THIENOPYRIMIDINE DERIVATIVES, THEIR PRODUCTION AND USE

Abstract: A thienopyrimidine derivative, wherein it has: (1) a carboxyl group which may be esterified and (2) a group which is capable of forming an anion or a group convertible thereinto except carboxyl group in its molecule, such as a compound of formula (I'), wherein each of R<1> and R<2> are hydrogen or an optionally substituted hydrocarbon residue, R<3> is a C1-6 alkyl group which is substituted by a C1-6 alkoxy-carbonyl group or a group of the formula: -NH-SO2-R<5>, wherein R<5> is : (1) a C1-6 alkyl group which may optionally be substituted by halogen or (2) a C6-14 aryl group, R<4> is an optionally substituted hydrocarbon residue or an optionnally substituted heterocyclic group, W denotes a chemical bond or a spacer group and n denotes an integer of 1 to 3; or a salt thereof, exhibits high endothelin receptor antagonist action and can, therefore, be used with advantager as a prophylactic or therapeutic drug for acute renal failure, myocardial infarction, lever disorder, angina pectoris, cerebral infarction, cerebrovasospasm, hypertension, kidney disease, asthma, ectopic angina, Raynaud's syndrome, pulmonary hypertension, surgical shock, chronic heart failure, atherosclerosis, cardiac hyperthrophy, migraine, etc., as a prophylactic or therapeutic drug for organ surgery- or graft-associated hypofunction of organs, as a prophylactic drug for vascular restenosis following percutaneous transluminal coronary angioplasty (PTCA), or as an inhibitor for vasoconstriction of cerebrovascular system or pulmonary vascular system.

Description: DESCRIPTION THIENOPYRIMIDINE DERIVATIVES, THEIR PRODUCTION AND USE Technical Field The present invention relates to thienopyrimidine derivatives and salts thereof. The present invention further relates to methods for manufacturing the thienopyrimidine derivatives and the salts thereof, and pharmaceutical compositions containing the thienopyrimidine derivatives. Background Art The possibility has been suggested that, among adult diseases which are being encountered with increasing frequencies in these years, ischemia- associated diseases such as cerebral infarction, angina pectoris, myocardial infarction, renal failure and hepatic disorder are mediated by endothelin. Endothelin is a peptide of 21 amino acid residues as produced and released from endothelial cells and endothelin-1, endothelin-2 and endothelin-3 have so far been identified. Throughout this specification, these endothelin species are collectively referred to as "endothelin". Endothelin reportedly is a substance having the most potent and lasting vasoconstrictive, pressor and heart muscle contractility-increasing actions of all the physiological substances and synthetic substances so far known. It is suspected that these actions of this particular peptide are manifested through the endothelin receptors suspected to exist in the vascular smooth muscle fascia and elsewhere. As the endothelin receptors, endothelin-A and endothelin-B receptors (both are collectively referred to as endothelin receptors) are already known. Therefore, any compound having an affinity for the endothelin receptors and showing endothelin antagonizing activity is likely to be effective in the prevention and treatment of ischemia-associated diseases (for example, cerebral infarction, angina pectoris, myocardial infarction, renal failure, and hepatic disorder) and the development of a drug of this type haε been awaited in earnest. As synthetic compounds having endothelin receptor antagonist activity, the compounds described typically in EP-A- 510526, EP-A-526708, PCT«WO-9308799, and Journal of Medicinal Chemistry, . 37., 1553-1557, 1994 are known. Recently, it has been pointed out that a thieno¬ pyrimidine derivative has endothelin receptor antagonist activity (European Patent Publication No. 640,606) . During the study of thienopyrimidine compounds, the present inventors have found that a thienopyrimidine compound which has a carboxyl group and a group capable of forming an anion in the molecule has particularly potent endothelin receptor antagonist activity. The inventors did further research on the basis of the above finding and have completed the present invention. Disclosure of Invention The present invention provides : (1) A thieno[2,3-d]pyrimidine derivative, i.e. compound (I), wherein it has (i) a carboxyl group or an ester thereof and (ii) a group other than a carboxyl group which is capable of forming an anion or a group convertible thereinto in its molecule; (2) A compound according to the item (1), wherein the group other than a carboxyl group which is capable of forming an anion or a group convertible thereinto is tetrazolyl, an optionally substituted sulfonamido group, a phosphono group or a sulfo group, each of which may optionally be substituted by alkyl or acyl; (3) A compound (I') of the formula: wherein each of R and R are hydrogen or an optionally substituted hydrocarbon residue, R is a Cχ_ 6 alkyl group which is substituted by a C,_ 6 alkoxy-carbonyl group or a group of the formula: -NH-S0 2 -R wherein R is (1) a Cι_ 6 alkyl group which may optionally be substituted by halogen or (2) a C 6 . 14 aryl group, R is an optionally substituted hydrocarbon residue or an optionally substituted heterocyclic group, W denotes a chemical bond or a spacer group and n denotes an integer of 1 to 3, or a salt thereof; (4) A compound according to the item (3), wherein R is an optionally substituted C,. 20 hydrocarbon residue; (5) A compound according to the item (4), wherein the ι- 20 hydrocarbon residue is a Cχ. 10 alkyl, C 3 _ 10 cycloalkyl, C 2 . 10 alkenyl, C 6 . aryl or C 7 _ 20 aralkyl group; (6). A compound according to the item (4), wherein R 1 is an optionally substituted C 7 . 20 aralkyl group; (7) A compound according to the item (3), wherein R iε a hydrocarbon residue optionally substituted with (1) halogen, (2) nitro, (3) cyano, (4) an optionally substituted hydroxyl group, (5) a group of the formula -S(0)f-R , wherein f denotes an integer of 0 to 2, and R is a hydrogen atom or an optionally substituted hydrocarbon residue, (6) an optionally substituted amino group or (7) an optionally substituted 5- or 6- membered heterocyclic group which contains 1 to 4 heteroatom(s ) of oxygen, sulfur or nitrogen; (8) A compound according to the item (3), wherein R is a hydrocarbon residue optionally substituted with halogen or a Cι_ 4 alkylthio group; (9) A compound according to the item (3), wherein R is an optionally substitueted C,_ 20 hydrocarbon residue; (10) A compound according to the item (9), wherein R is an optionally substituted Cι_ 10 alkyl, C 3 - 10 cycloalkyl, C 2 _ι 0 alkenyl, C 6 . 1 aryl or C 7 _ 20 aralkyl group; (11) A compound according to the item (3), wherein R ' is an optionally substituted Cι_ 10 alkyl; (12) A compound according to the item (3), wherein R is a hydrocarbon residue optionally substituted with (1) halogen, (2) nitro, (3) cyano, (4) an optionally substituted hydroxyl group, (5) a group of the formula: -S(0)f-R , wherein f denotes an integer of 0 to 2, and R is a hydrogen atom or an optionally substituted hydrocarbon residue, (6) an optionally substituted amino group or (7) an optionally substituted 5- or 6- membered heterocyclic group which contains 1 to 4 heteroatom(s) of oxygen, sulfur or nitrogen; (13) A compound according to the item (3), wherein R is a hydrocarbon residue optionally substituted with (1)- halogen, (2) nitro, (3) hydroxyl, (4) cyano, (5) Ci. 4 alkylthio, (6) Cι_ 4 alkoxy, (7) C,_ 6 alkyl- carbonyloxy or (8) C 3 . 6 cycloalkyl-oxycarbonyloxy; (14) A compound according to the item (3), wherein R " is hydrogen or a Cι_ 6 alkyl group which may optionally be substituted by Cy_ 6 alkyl-carbonyloxy or C 3 _ 6 cycloalkyl-oxycarbonyloxy; (15) A compound according to the item (3), wherein R 1 is a Cι- 6 alkyl group which is substituted by a Cι_ 6 alkoxy-carbonyl group or a group of the formula: -NH- S0 2 -R , wherein R is a Cj-e alkyl group or a C 6 _ 1( aryl group; (16) A compound according to the item (3), wherein R " is a C j -e alkyl group which is substituted by a group of the formula: -NH-S0 2 -R 5 , wherein R 5 is (1) a C,. 6 alkyl group which may optionally be substituted by halogen or (2) a C 6 _ 14 aryl group; (17) A compound according to the item (3), wherein R is a C j _ 6 alkyl group which is substituted by a group of the formula: -NH-S0 Z -R 5' , wherein R 5' is a C,_ 6 alkyl group or a C 6 _, 4 aryl group; (18) A compound according to the item (3), wherein R' is optionally substituted C j .^ hydrocarbon residue or an optionally substituted 5- to 13-membered heterocyclic group which contains 1 to 4 heteroatom(s ) of oxygen, εulfur or nitrogen; (19) A compound according to the item (3), wherein R is an optionally substituted C 6 .,, ( aryl group; (20) A compound according to the item (3), wherein R is a hydrocarbon residue optionally substituted with (1) halogen, (2) nitro, (3) cyano, (4) C j .β alkoxy which may optionally be substituted by C j - 6 alkoxy, carboxyl, halogen, C,_ 5 alkyl-carba oyl or 5 to 7 membered nitrogen-containing heterocyclic group-carbonyl , (5) C 7 _ 13 aralkyloxy, (6) Cι. 4 alkyl which may be substituted by C,_ 3 alkoxy, (7) C,_ 6 alkanoyl, (8) C,_ 4 alkylthio, (9) C 2 . 6 aikenyloxy, (10) C,. 6 alkoxy-carbonyl or (11) C,_ 6 alkyl-carbamoyl; (21) A compound according to the item (3), wherein the R is a hydrocarbon residue optionally substituted with Cχ_ 6 alkoxy which may optionally be substituted by C,. 6 alkoxy, carboxyl, halogen, C,_ 6 alkyl-carbamoyl, a 5 to 7 membered nitrogen-containing heterocyclic group- carbonyl ; (22) A compound according to the item (3), wherein is a spacer group selected from the group consisting of (1) C,_ 4 alkylene, (2) C 2 - 6 alkenylene, (3) a group of the formula ~(CH 2 )cNR 7 -, where c represents an integer of 0-3, R 7 represents hydrogen or C,_ 6 alkyl, (4) -CO-, (5) a group of the formula -CONR-, where R is as defined above, (6) -0-, (7) a group of the formula: - S(0)f-, where f represents an integer of 0 to 2, and (8) a group of the formula: -NRS(0)e-, where e represents an integer of 0-2; R is as defined above; (23) A compound according to the item (3), wherein W is a chemical bond; (24) A compound according to the item (3), wherein R is benzyl group which may optionally be substituted by (1) halogen or (2) C,_ 4 alkylthio, R 2 is a hydrogen atom or a Ci- 4 alkyl group which may optionally be substituted by (1) C,_ 6 alkyl-carbonyloxy or (2) C 3 - 6 cycloalkyl-oxycarbonyloxy, R is a Cj- 6 alkyl group which is substituted by (1) a Cj- 6 alkoxy-carbonyl group or (2) a group of the formula: -NH-S0 2 -R 5" (wherein R 5" is (1) a C^ alkyl group which may optionally be substituted by halogen or (2) a phenyl group, is a chemical bond, R is a phenyl group which is substituted by (1) C 1-4 alkoxy, which may be substituted by Cι_ 6 alkoxy, carboxyl, Cι- 6 alkyl-carbamoyl, piperazinecarbonyl or halogen, (2) C 7 . 8 aralkyloxy, (3) C,. 4 alkyl which may be substituted by d_ 3 alkoxy, (4) Cι_ 6 alkanoyl, (5) C 2 . 4 aikenyloxy, (6) C^ alkoxy-carbonyl or (7) C,_ 6 alkyl carbamoyl; (25) 2,4(lH,3H)-dioxo-6-(4-methoxymethoxyphenyl)-l-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)- thieno[2,3-d]pyrimidine-3-acetic acid or its salt; (26) 2 ,4( IH,3H)-dioxo-6-(4-methoxymethoxyphenyl)-1-(2- methylthiobenzyl)-5-(ethanesulfonamidomethyl)- thieno[2, 3-d]pyrimidine-3-acetic acid or its salt; (27) 2,4 ( lH,3H)-dioxo-6-(4-methoxyphenyl)-l-(2- ethylthiobenzyl)-5-(methanesulfonamidomethyl)- thieno[2, 3-d]pyrimidine-3-acetic acid or its salt; (28) Ethyl 2,4 ( IH, 3H) -dioxo-6-(4-methoxyphenyl)-1-(2- methylthiobenzyl)-5-(carboxymethyl)thieno[2,3- d]pyrimidine-3-acetate; (29) A method for producing a compound as defined in the item (3), which comprises subjecting a compound (II) of the formula: wherein, R , R , W and R have the same meaning as defined in the item (3) and R is a C,. G alkyl group which is halogenated or cyanated, to (1) a nucleophilic substitution reaction with a sulfonamide compound when the alkyl of R is halogenated or (2) alkali- hydrolysis and then esterification when the alkyl of 3 > R is cyanated; (30) A pharmaceutical composition, which comprises a compound as defined in the item (1), (3) or (28) and a carrier, excipient or diluent therefor; (31) A pharmaceutical compoεition according to the item (30), which is a therapeutic drug for treating vasoconstriction in a mammal; (32) A pharmaceutical composition according to the item (31), wherein the vasoconstriction is in a coronary artery, coronary vein, cerebrovascular system or pulmonary vascular system; and (33) A pharmaceutical composition according to the item (30), which is for antagonizing endothelin activity; (34) A pharmaceutical composition according to the item (33), which is a therapeutic drug for acute renal insufficiency, cardiac infarction or liver insufficiency; (35) A pharmaceutical composition according to the item (33), which is a treapeutic drug for hypofunction of an organ caused by a surgery or transplant; (36) A pharmaceutical composition according to the item (35), wherein the organ is liver; (37) A method for treating a mammal suffering from vasoconstriction, which comprises administering an effective amount of a compound as defined in the item (1), (3) or (28) to the mammal; and (38) A method for treating a mammal suffering from acute renal insufficiency, cardiac infarction or liver insufficiency, which comprises administering an effective amount of a compound as defined in the item (1), (3) or (28) to the mammal. (39) Use of a compound as defined in item (1), (3) or (28) for producing a pharmaceutical composition for the manufacture of a medicament for therapeutic application on vasoconstriction. (40) Use of a compound as defined in item (1), (3) or (28) for producing a pharmaceutical composition for the manufacture of a medicament for therapeutic application on acute renal insufficiency, cardiac infarction or liver insufficiency. The nucleus of the present compound, 2,4(1H,3H)- dioxo-thieno[2, 3-d]pyrimidine, is shown below: The esterified carboxyl group in the thienopyrimidine derivatives includes a group represented by the formula: -CO-D, wherein D denotes (1) hydroxyl group, (2) a group of the formula: -O-R , wherein R is an optionally εubstituted hydrocarbon residue or an optionally subεtituted amino group. The group which is capable of forming an anion or a group convertible thereinto except carboxyl group includes tetrazolyl, an optionally substituted sulfonamide group, e.g. a group of the formula: -NH- S0 2 -R wherein R 5 is (1) a C^ alkyl group which may optionally be substituted by halogen or (2) a C 6.14 aryl group, phoεphono group and sulfo group, each of which may optionally be substituted by one or 2 of C,_ 6 alkyl or acyl, e.g. C 2 . 5 alkanoyl, e.g. acetyl, propionyl, butyryl, valeryl, or C 6 . 14 arylcarbonyl, e.g. benzoyi. As preferred example of the compound (I), mention is made of a compound (I') of the formula: wherein each of R 1 and R are hydrogen or an optionally substituted hydrocarbon residue, R is a Cj.g alkyl group which is substituted by a Cι_ 6 alkoxy-carbonyl group or a group of the formula: -NH-S0 2 -R wherein R is (1) a Cι_ 6 alkyl group which may optionally be substituted by halogen or (2) a C 6 - 14 aryl group, R is an optionally substituted hydrocarbon residue or an optionally substituted heterocyclic group, denotes a chemical bond or a spacer group and n denotes an integer of 1 to 3, or a salt thereof. The hydrocarbon residue in the optionally o substituted hydrocarbon residue for the group R in the group D, the group R , the group R , the group R in the formula (I') and the group R mentioned below includes a hydrocarbon residue having one to 20 carbon atoms. As examples of the Cι_ 20 hydrocarbon residue, mention is made of C,. 10 alkyl, e.g. methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, etc, and among others, C ] . 6 alkyl is preferable, C 3 - 10 cycloalkyl, e.g. cydopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, etc, and among others, C 3 . 6 cycloalkyl is preferable, C 7 - 10 bicycloalkyl, e.g. bicyclo[2,2,1]heptyl , bicyclo[2,2,2]octyl, bicyclo[3, 2,1]octyl, bicyclo[3,2 , 1]nonyl, bicyclo[4, 2, 1]nonyl and bicyclo[ 4 , 3 , 1 ]decyl , etc, C 2 ., 0 alkenyl, e.g. vinyl, allyl, isopropenyl, 1-butenyl, 2- butenyl, butadienyl, hexatrienyl, etc, and among others, C 2 . 6 alkenyl is preferable, C 5 _ 14 aryl e.g. phenyl, naphthyl, anthryl, phenanthryl, acenaphthyl, anthracenyl, etc., among others, phenyl, 1-naphthyl, 2- naphthyl are preferable, and C 7 . 20 aralkyl, e.g. benzyl, phenethyl, benzhydryl, trityl, etc, and among others, C 7 _ 8 aralkyl, e.g. benzyl and phenethyl are preferable. The substituent which said hydrocarbon residue may optionally have includeε but is not limited to (1) halogen, e.g. fluorine, chlorine, bromine, iodine, (2) nitro, (3) nitroso, (4) cyano, (5) hydroxyl group which may optionally be substituted by (i) C,- 6 alkyl, which may optionally be substituted by hydroxyl, C,_ 6 alkoxy, C x . 3 • alkoxy-C U3 alkoxy, C,_ 3 alkylthio, oxy-C^ alkoxy, carboxyl, carbamoyl, Cι_ β alkyl-carbamoyl, 5 to 7 membered nitrogen containing heterocyclic group- carbonyl or halogen, (ϋ) C,_ 6 acyl, (iii) C 7 . Z0 aralkyl, which may optionally be substituted by halogen, C^ alkoxy or C,_ 4 alkyl, (iv) C 6 . 14 aryl, which may optionally be substituted by halogen, (v) C 2 . 6 alkenyl, (vi) C 3 _ 7 cycloalkyl, (vii) C w alkoxy-carbonyl, (viii) mono- or di-Cι_ 6 alkyl-amino, (ix) C^ alkoxy-carbonyl, (x) Cι_ 6 alkyl-carbonyl, (xi) C 3 . 6 cycloalkyloxycarbonyl or (xii) trifluorosulfonyl, (6) a group of the formula: -S(0)f-R 6 , wherein f is an integer of 0 to 2 , R represents a hydrogen atom or a hydrocarbon residue which may optionally be subεtituted, the hydrocarbon residue has the same meaning as defined above, among others, C^ alkyl, C 6 . 14 aryl, C 7 _ 20 aralkyl are preferable, and as examples of the substituent to the hydrocarbon residue, mention is made of halogen, nitro, cyano, hydroxy, oxo, thioxo, carboxyl, cyano-C 6 _ 14 aryl, halogeno-C 6 . 14 aryl, etc, (7) an optionally substituted amino group, which is represented by the formula: - NR 9 R 10 , wherein each of R and R are hydrogen, hydrocarbon residue, which has the same meaning as defined above, C 1 _ 6 acyl or a 5 to 13 membered heterocyclic group which is mentioned below, (8) an optionally substituted carboxyl group of the formula: - CO-R l wherein R 11 denotes (i) hydrogen, (ii) hydroxyl, (iii) C,_ 6 alkyl, (iv) C,_ 6 alkoxy, (v) C 3 . 6 cycloalkyl, (vi) C 6 .ι 4 aryl, (vii) C 7 . 20 aralkyl, (viii) an optionally substituted amino group which is defined above or (vix) an optionally substituted 5- to 13-membered heterocyclic group which is mentioned below, (9) a 5- through 13-membered heterocyclic group containing 1-4 hetero-atom(s ) selected from oxygen (0), sulfur (S) and nitrogen (N) as ring members, the heterocyclic group being optionally substituted by (i) halogen, (ii) Cγ.,, alkyl, (iii) C 3 alkoxy, (iv) C,.,, alkylthio, (v) phenoxy which may optionally be substituted by a halogen, (10) sulfo, (11) C 6 _ 14 aryl, e.g. phenyl, naphthyl, anthryl, phenanthryl , acenaphthyl, anthracenyl , etc, (12) C 3 - 7 cycloalkyl, (13) C,- 6 alkylenedioxy, e.g. methylenedioxy, ethylenedioxy, propylenedioxy, 2,2- dimethylenedioxy, etc, (14) oxo, (15) thioxo, (16) C 2.Λ alkenyl, (17) C 3 . 4 alkynyl, e.g. propagyl, 2-butenyl, etc, (18) C 3 -, 0 cycloalkyl, (19) C 2 - 10 alkenyl, e.g. vinyl, allyl, isopropenyl, 1-butenyl, 2-butenyl, butadienyl, hexatrienyl, etc., and among others, C 2 . 6 alkenyl is preferable, (20) C 7 . 20 aralkyl, which has the same meaning as defined above, (21) amidino, and (22) azido. When the hydrocarbon residue is cycloalkyl, cycloalkenyl, aryl or aralkyl, each of the group may have one to three of Cι- 6 alkyl, e.g. methyl, ethyl, propyl, isopropyl, butyl, as a substituent. The C j .g alkyl group may further substituted by one to three of hydroxy, oxo, C^ alkoxy, e.g. methoxy, ethoxy, n- propoxy, isopropoxy, C^ alkylthio, halogen or carbamoyl. i The examples of the substituted alkyl, mention is made of (1) formyl, i.e. methyl is substituted by oxo, (2) carboxyl, i.e. methyl is substituted by oxo and hydroxy, (3) C 6 alkoxy-carbonyl, i.e. methyl is subεtituted by oxo and alkoxy, e.g. methoxycarbonyl, ethoxycarbonyl, t-butoxycarbonyl, hydroxy-C^ alkyl, e.g. hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxybutyl, (4) C 1 . 3 alkoxy-Cj.e alkyl, e.g. methoxymethyl, ethoxyethyl, ethoxybutyl, propoxymethyl, propoxyhexyl . In the above optionally substituted hydrocarbon residue, the number of the εubεtituent(ε) iε preferably 1 to 6, more preferably 1 to 5, and εtill preferably 1 to 3 and moεt preferably 1 to 2. The number of the subεtituent(ε) which iε εubεtituted on the εubεtituent iε preferably 1 to 3, more preferably 1 or 2. In the formula (I), n denotes 1 to 3, preferably 1 or 2, more preferably 1. The C,_ 6 alkyl group in the Cj.g alkyl group which is subεtituted by a C v _ 6 alkoxy-carbonyl group or a 5 3 group of the formula: -NH-S0 2 -R mentioned for R includeε methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, t-butyl, pentyl, hexyl, etc. Particularly preferred is methyl or ethyl. The Ci .β alkoxy in C x _ 6 alkoxy-carbonyl group of R ' includes methoxy, ethoxy, propoxy, isopropoxy, n- butoxy, isobutoxy, t-butoxy, pentoxy, hexyloxy. In particular, C j _ 4 alkoxy is preferable. The Cj. 6 alkyl group of the C^ alkyl which may optionally be substituted by halogen of R includes the same groups as mentioned above. In particular, methyl or ethyl, is preferred. The halogen includes fluorine, chlorine, bromine, iodine. Among others, fluorine and chloride is preferable. The number of the subεtituent is preferably 1 to 3. The C 6 . 14 aryl group of R includes phenyl, naphthyl, anthryl . Among others, phenyl is preferable. The heterocyclic group of the optionally substituted heterocyclic group mentioned for R' includes 3- through 13-membered, preferably 5- through 13-membered, heteroaromatic groups and non-aromatic saturated or unsaturated heterocyclic groups containing 1-4 hetero-atoms εelected from among oxygen (0) , sulfur (S) and nitrogen (N) as ring members. The preferred heteroaromatic group includes mono¬ cyclic heteroaromatic groups such as furyl, thienyl, pyrrolyl, pyrrolinyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, imidazolinyl, pyrazolyl, pyrazolinyl, 1,2, 3-oxadiazolyl, 1, 2 ,4-oxadiazolyl, 1, 3,4-oxadiazolyl, furazanyl, 1,2, 3-thiadiazolyl, 1,2, 4-thiadiazolyl, 1, 3,4-thiadiazolyl, triazinyl, 1 ,2,3-triazolyl, triazolidinyl , 1, 2 ,4-triazolyl, tetrazolyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazinyl, etc., and fused heteroaromatic groups such as benzofuranyl, isobenzofuranyl, benzo[b]thienyl, indolyl, isoindolyl, lH-indazolyl , benzimidazolyl, benzoxazolyl, 1,2-benzisoxazolyl, benzothiazolyl, 1,2-benziεothiazolyl, 1H- benzotriazolyl, quinolyl, isoquinolyl, cinnolinyl, quinazolinyl, quinoxalinyl, phthalazinyl, naphthylidinyl, purinyl, pteridinyl, carbazolyl, α- carbolinyl, β-carbolinyl, γ-carbolinyl, acridinyl, phenoxazinyl, phenothiazinyl, phenazinyl, phenoxathiinyl, thianthrenyl, phenathridinyl, phenanthrolinyl, indolidinyl, pyrrolo[l,2- b]pyridazinyl, pyrazolo[ 1,5-a]pyridyl, imidazo[l,2- a]pyridyl, imidazo[ 1,5-a]pyridyl, imidazo[l,2- b]pyridazinyl, imidazo[1,2-a]pyrimidinyl, 1,2,4- triazolo[4,3-a]pyridyl, 1,2 ,4-triazolo[4,3- bjpyridazinyl, etc. The preferred nonaromatic heterocyclic group includes oxiranyl, azetidinyl, oxetanyl, thietanyl, thiazolidinyl, pyrrolidinyl, pyrazolidinyl, imidazolidinyl, tetrahydrofuryl, thioranyl, piperidyl, piperidinyl, tetrahydropyranyl, morpholinyl, thiomorpholinyl, piperazinyl, oxazolino, hexamethyleneamino, etc. As the heterocyclic group, a 5 to 7 membered heretocyclic group is prefereble, and a 5 to 6 membered heterocyclic group is more prefereble. The above heterocyclic groupε may each have 1 or more, preferably 1-3, εuitable εubεtituentε, which can be the εame aε the above-mentioned substituentε for hydrocarbon reεidue. The εpacer group mentioned for W includeε C x _ 4 alkylene, e.g. methylene, ethylene, etc, C 2 . 6 alkenylene, e.g. vinylene, butadienylene, etc, groups of the formula -(CH 2 )cNR-, where c represents an integer of 0-3, R representε hydrogen or Cj_ 6 alkyl, e.g. methyl, ethyl, propyl, butyl, etc, -CO-, groupε of the formula -CONR-, where R is as defined above, -0-, -S(0)f-, where f representε an integer of 0 to 2, and - NRS(0)e-, where e repreεentε an integer of 0-2; R iε as defined above, among other groups. The optionally εubεtituted hydrocarbon reεidue of R iε preferably C 1 . 20 hydrocarbon reεidue. Among others, C J . J Q alkyl, C 3 _ι 0 cycloalkyl, C 2 _ 10 alkenyl, C 6 . 14 aryl and C 7 . 20 aralkyl are preferable. As R , an optionally substitued C 7 . 20 aralkyl iε most preferable. As preferable examples of the substituent in the optionally subεtituted hydrocarbon reεidue of R is (1) halogen, (2) nitro, (3) cyano, (4) an optionally subεtituted hydroxyl group, (5) a group of the formula: -S(0)f-R wherein f denotes an integer of 0 to 2, and R is a hydrogen atom or an optionally subεtituted hydrocarbon reεidue, (6) an optionally substituted amino group or (7) an optionally subεtituted 5- or 6- membered heterocyclic group which contains 1 to 4 heteroatom(s) of oxygen, sulfur or nitrogen. The group R 1 is preferably the group of the formula: -(CH 2 )-.Q, wherein m is an integer of 0 to 3 and Q iε an optionally substituted C 6 _ 14 aryl group, an optionally subεtituted C 3 . 10 cycloalkyl group or an optionally subεtituted 5 to 13-membered heterocyclic group. Aε the above optionally εubεtituted C 6 . 14 aryl group, a C 6 . 14 aryl group which may have one to three εubεtituent(ε) of halogen, nitro, cyano, amino, carboxyl which may be optionally εubstituted, C 6 alkylenedioxy, Cχ .6 alkoxy, Ci-e alkylthio or a group of the formula: -A-R 12, wherein A is a spacer group having the same meaning as W, and R 12 is Cj.g alkyl. The optionally subεtituted carboxyl has the same meaning of the above group of the formula: -CO-R . In particular, Q iε preferably C 6 . 14 aryl group optionally εubstituted by (1) halogen, (2) C x . e alkoxy, (3) C 6 alkylthio, (4) a 1 group of the formula: -A-R 12 (wherein A and R 12 have the same meaning as defined above. Furthermore, Q is more preferably C 6 . 14 aryl which may be substituted by (1) halogen, (2) C J . J alkylthio or (3) C,_ 6 alkoxy. As the aryl, phenyl is most preferable. As the preferable group of R , mention is made of a C 7 _ 20 aralkyl which is optionally substituted. As the preferable example of the substituent, mention is made of (1) halogen, (2) nitro, (3) hydroxy, (4) cyano, (5) C x _ 4 alkyl, (6) C 1-4 alkylthio, (7) C^,, alkoxy. Among others, (1) halogen and (2) Cj- 4 alkylthio is preferable, and C l alkylthio is most preferable. As the C 7 - 2o aralkyl, benzyl is most preferable. As the optionally substituted amino group represented by R 8 , mention is made of a group of the formula: -NR 9R10, wherein R9 and R-0 are the same or different hydrogen, hydrocarbon residue, which has the same meaning as defined above, C^ acyl or heterocyclic group which is mentioned below. As the preferred group of R " , mention is made of those of R . Further, as the group R , hydrogen or an optionally substituted alkyl is preferable. As the alkyl, an optionally substituted C^ alkyl is more preferable, and furthermore an optionally substituted C,_ 4 alkyl is most preferable. As the substituent on the alkyl of R ' , preferred examples are (1) halogen, (2) nitro, (3) cyano, (4) an optionally substituted hydroxyl group, (5) a group of the formula: -S(0)f-R 6 , wherein f denotes an integer of 0 to 2 , and R is a hydrogen atom or an optionally substituted hydrocarbon residue, (6) an optionally substituted amino group or (7) an optionally substituted 5- or 6-membered heterocyclic group which contains 1 to 4 heteroatoms of oxygen, sulfur or nitrogen. Among others, as substituents, (1) halogen, (2) nitro, (3) hydroxy, (4) cyano, (5) C alkylthio, (6) C ! _ 4 alkoxy, (7) C^ alkyl-carbonyloxy, (8) C 3 . 6 cycloalkyl-oxycarbonyloxy are preferred. In these groups, (1) C^g alkyl-carbonyloxy or (2) C 3 . 6 cycloalkyl-oxycarbonyloxy is most preferable. As the group R , preferable examples include (a) a C 6 alkyl group which is substituted by (1) a C^ alkoxy-carbonyl group or (2) a group of the formula: - NH-S0 2 -R , wherein R is a C^ alkyl group or a C 6 . 14 aryl group, (b) a C^g alkyl group which is subεtituted by a group of the formula: -NH-S0 2 -R , wherein R is (1) a C j _ 6 alkyl group which may optionally substituted by halogen or (2) or C 6 . 14 aryl group, (c) a C^g alkyl group which is subεtituted by a group of the formula: - NH-S0 2 -R 5' , wherein R 5' iε a Ci_ 6 alkyl group or a C 6 . 14 aryl group, (d) a C^ alkyl group which iε substituted by a group of the formula: -NH-S0 2 -R , wherein R is a Ci_ 3 alkyl group which may optionally be substituted by halogen or a phenyl group, (e) a C γ _ 6 alkyl group which iε εubεtituted by a group of the formula: -NH-S0 2 -R , wherein R iε a C^ alkyl group or a phenyl group, (f) a C,_ 6 alkyl group which is εubεtituted by a group of the formula: -NH-S0 2 -R 5" " , which R 5"" iε a C x _ 6 alkyl group, and (g) a Cj.g alkyl group which iε subεtituted by a group of the formula: -NH-S0 2 -R , wherein R 5""' is a Ci_ 3 alkyl group. As the group R , an optionally substituted C 6.14 aryl group, an optionally substituted C 7 . 20 aralkyl group, an optionally subεtituted C 3 . 7 cycloalkyl group, an optionally εubεtituted carboxyl group of the formula -CO-R aε mentioned above or an optionally substituted 5- to 13-membered heterocyclic group which contains 1 to 4 heteroatoms of oxygen, εulfur or nitrogen (5- or 6-membered heterocyclic group is preferable), are preferable. The substituent of the above groups are the same as those of hydrocarbon residue as mentioned above. As preferred examples of the substituents, mention is made of (1) halogen, (2) nitro, (3) cyano, (4) C f) alkoxy which may optionally be substituted by Cγ_ 6 alkoxy, carboxyl, halogen, C^ alkyl-carbamoyl, 5 to 7 membered nitrogen-containing heterocyclic group, (5) C 7 - 13 aralkyloxy, (6) C^ alkyl which may be substituted by hydroxy, oxo or C j ,- 3 alkoxy, (7) C^g alkanoyl, (8) C,_ 4 alkylthio, (9) C 2 . 6 aikenyloxy, (10) C t _ 5 alkoxy- carbonyl or (11) C^g alkyl-aminocarbonyl . As the group R , preferred examples are a C 6 . 1 aryl group, a C 3 - ]0 cycloalkyl group, a 5 to 13 membered heterocyclic group, or carboxyl group, each of these groups being optionally substituted, and an optionally substituted C 6 . 14 aryl group is more preferable. In the group R , as preferred examples of the substituents, mention is also made of C .g alkoxy which may optionally substituted by a Cj-g alkoxy, carboxyl, halogen, Cι_ 6 alkyl-carbamoyl or 5 to 7 membered nitrogen-containing heterocyclic group. Additional preferred examples of R are C 6 . 14 aryl which may be substituted by (1) C j .g alkoxy, which may be substituted by halogen or Cχ- 6 alkoxy or (2) C U6 alkylthio. A most preferred example of the group R' is C 6 . ]4 aryl which may optionally be substituted by an optionally substituted C x _ alkoxy, especially C^ alkoxy which may optionally be substituted by C]_ 6 alkoxy. Still other preferred examples of the group R' are phenyl which may be substituted by (1) Cι_ 4 alkoxy which may be εubεtituted by Cj.g alkoxy, carboxy, C,_ 6 alkyl¬ carbamoyl, piperazinecarbonyl or halogen, (2) C 7 . 8 aralkyloxy, (3) C,_ 4 alkyl which may optionally be εubεtituted by hydroxy, oxo or Cj- 3 alkoxy, eεpecially C j _ 4 alkyl which may optionally be substituted by C j - 3 alkoxy, (4) Cj.g alkanoyl, (5) C 2 _ 4 aikenyloxy, (6) C j .g alkoxy-carbonyl or (7) Cj. 6 alkyl-carbamoyl. W is preferably a chemical bond or an εpacer group of the formula -S(0)f-, wherein f repreεents an integer of 0-2, the formula -CO-, or the formula -CONR 7 -, where R represents Cj.ή alkyl such as methyl, ethyl, propyl, butyl, etc. W is most preferably a chemical bond. In the above definitions, C 2 . 6 alkenyl is exemplified by vinyl, allyl, iεopropenyl, butenyl, hexatrienyl, C 2 _ 4 alkenyl iε exemplified by vinyl, allyl, iεopropenyl, butenyl. C 6 . 14 aryl iε exemplified by phenyl, naphthyl, anthryl, phenanthryl, acenaphthyl, anthracenyl, especially phenyl is most preferable. C 7 _ 8 aralkyl is exemplified by benzyl and phenethyl . C ι _ 6 alkoxy is exemplified by methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, isobutoxy, s-butoxy, t- butoxy, pentyloxy, hexyloxy, C^,, alkoxy is exemplified by methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, isobutoxy, s-butoxy, t-butoxy. C ι _ 3 alkoxy is exemplified by methoxy, ethoxy, propoxy, isopropoxy. Halogen is exemplified by fluorine, chlorine, bromine, iodine. C j . 6 alkyl is exemplified by methyl, ethyl, n- propyl, isopropyl, n-butyl, isobutyl, t-butyl, pentyl, hexyl. C j . 4 alkyl iε exemplified by methyl, ethyl, n- propyl, isopropyl, n-butyl, isobutyl, t-butyl. C^ alkyl is exemplified by methyl, ethyl, n-propyl, isopropyl. c --ιo cycloalkyl iε exemplified by cydopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl . C 3 _ 7 cycloalkyl iε exemplified by cydopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl . C 3 _ 6 cycloalkyl is exemplified by cydopropyl, cyclobutyl, cyclopentyl, cyclohexyl. c ι- 6 acyl is exemplified by formyl and C x .g alkanoyl of the formula: -CO-Rι 3 , wherein Rι is methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, pentyl. C 2 . 6 alkanoyl is exemplified by the formula: -CO- R , wherein R 13 has the same meaning as defined above. Cj_ 4 acyl is exemplified by formyl and the formula: -CO- R 13' (wherein R1 3 ' iε methyl, ethyl, n-propyl, isopropyl. ) . Preferable five to seven-membered heterocyclic groups which contain 1 to 4 heteroatoms of oxygen, sulfur or nitrogen are exemplified by thienyl, furyl, pyrrolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, imidazolyl, triazolyl, tetrazolyl, furazanyl, tetrahydrofuryl, pyridyl, pyrimidinyl, pyridazynyl, oxadiazolyl, tetrahydropyranyl, morpholinyl, thiomorpholinyl, pyrrolidinyl, pyrrolinyl, pyrazolidinyl, pyrazolinyl, imidazolidinyl, imidazolinyl, imidazolyl, 1,2, 3-triazinyl, 1,2,3- triazolidinyl, 1,2, 3-triazolyl, 1,2,3,4-tetrazolyl, piperidinyl, piperazinyl, hexamethyleneaminyl, oxazolidinyl or thiazolidinyl. As more preferable heterocyclic groups, mention is made of 5 to 6 membered heterocyclic groups. In particular, pyrrolidinyl, pyrazolinyl, pyrazolyl, piperidinyl, piperazinyl, morpholinyl and thiomorpholinyl are preferable. In the above definition, the number of the substituent(s) is preferably 1 to 3. The present compound (I) and their saltε can be produced by per se known methods. Typically, the present compound can be produced by the processes described below. (a) The compound (I') in which R is hydrogen and R is an optionally subεtituted hydrocarbon residue, that is to say compound (IV) or a salt thereof can be produced by cyclizing a compound of the following general formula (II') or a salt thereof with a base. R-OO wherein R represents an optionally substituted hydro¬ carbon residue; R 3 , and n are as defined herein¬ before; R ' represents hydrogen or an optionally substituted hydrocarbon residue being the same as above. This reaction is carried out in a solvent that does not interfere with the reaction. The solvent that can be used includes but is not limited to alcohols such as methanol, ethanol, isopropyl alcohol, etc. and ethers such as dioxane, tetrahydrofuran, etc. The baεe mentioned above may for example be an alkali metal alkoxide, e.g. εodium methoxide, sodium ethoxide, sodium isopropoxide, etc., or an alkali metal hydride, e.g. sodium hydride. The amount of the base with respect to compound (II') is about 1.1-5 molar equivalents, preferably about 1.5-3 equivalents. The reaction temperature may range from about 10°C to the boiling point of the solvent used and is preferably about 25°C to the boiling point of the solvent. The reaction time is several minutes to a few dayε and preferably about 10 minutes to 2 days. (b) Compound (IV) or a salt thereof can be produced by cyclizing a compound of the following general formula (III) or a salt thereof in the presence of a base and subjecting the cyclization product to electrophilic substitution reaction for introducing a group of the formula -WR , where W and R ' are as defined hereinbefore. wherein R represents an optionally substituted hydro- carbon residue; R is as defined hereinbefore; R represents hydrogen or an optionally substituted hydrocarbon residue; n represents a whole number of 1- 3. This cyclization reaction is conducted in a solvent that does not interfere with the reaction. The εolvent that can be used includes but is not limited to alcohols such as methanol, ethanol, isopropyl alcohol, etc. and ethers such as dioxane, tetrahydrofuran, etc. The base that can be used includes alkali metal alkoxides such as sodium methoxide, sodium ethoxide, sodium isopropoxide, etc. and alkali metal hydrides such as sodium hydride etc. The proportion of the base with respect to compound (III) is about 1.1-5 molar equivalents and preferably about 1.5-3 equivalents. The reaction temperature may range from about 10°C to the boiling point of the solvent used and is preferably about 25°C to the boiling point of the solvent. The reaction time is several minutes to a few days and preferably about 10 minutes to 2 days. This electrophilic subεtitution can be achieved by a per εe known electrophilic εubstitution reaction. Specific examples of such reaction are the nitration reaction, e.g. the reaction using fuming nitric acid- concentrated sulfuric acid or εodium nitrate- concentrated sulfuric acid, acylation reaction, e.g. the reaction using an acid chloride-aluminum chloride, formylation reaction, e.g. the reaction using phosphorus oxychloride-N,N-dimethylformamide or N- methylformanilide, and halogenation reaction, e.g. the reaction using N-bromosuccinimide, bromine-pyridine, or sulfuryl chloride. The electrophilic substitution reaction can be carried out under per se known reaction conditions. Typical sets of conditions are as follows. The nitration reaction is conducted in fuming nitric acid- concentrated sulfuric acid, εodium nitrate-concentrated εulfuric acid, or potaεsium nitrate-concentrated sulfuric acid at about 0-80°C. The acylation reaction is carried out using an alkanoyl chloride, e.g. acetyl chloride, propionyl chloride, etc, in a solvent that does not interfere with the reaction, e.g. nitrobenzene, nitromethane, carbon disulfide, etc, in the presence of a Lewis acid catalyst, e.g. aluminum chloride, titanium tetrachloride, etc, at about 0- 100°C. The formylation reaction is carried out using phosphorus oxychloride-N,N-dimethyIformamide/N- methylformanilide, oxalyl chloride-N,N- dimethylformamide/N-methylformanilide, thionyl chloride-N,N-dimethylformamide/N-methylformanilide in a solvent that does not interfere with the reaction, e.g. benzene, toluene, xylene, tetrahydrofuran, dioxane, 1,2-dichloroethane, etc, or in the absence of a solvent at about 15-130°C. The halogenation reaction is carried out using sulfuryl chloride, N- chloroεuccinimide, N-bromosuccinimide, bromine. chlorine, or iodine in a εolvent that does not interfere with the reaction, e.g. dichloromethane, chloroform, carbon tetrachloride, 1,2-dichloroethane, pyridine, benzene, toluene, xylene, etc, at about 15- 130°C. The εubstituent group introduced by the above electrophilic substitution reaction can be subjected, where desired, to a functional group transformation reaction. This functional group transformation reaction can be carried out by the per se known transformation reaction. Specific examples of the reaction are reduction reaction, acylation reaction, sulfonylation reaction, alkylation reaction, diazo coupling reaction, Wittig reaction, halogenation reaction, halide-Grignard reaction, and coupling reaction with an organozinc reagent, an organoboron reagent or an organotin reagent. (c) The compound (I') wherein R represents an option- 2 ally substituted hydrocarbon residue and R represents an optionally subεtituted hydrocarbon residue, that is to say compound (VI), or a salt thereof can be produced by reacting the compound (IV) or a salt thereof as prepared by the above procedure (a) or (b) with a compound of the general formula (V): R -X (V), wherein R represents an optionally substituted hydrocarbon residue; X represents halogen, or a salt thereof . The optionally subεtituted hydrocarbon reεidue mentioned for R has the same meaning aε defined hereinbefore. The halogen mentioned for X includeε fluorine, chlorine, bromine, and iodine. Thiε reaction iε conducted in a εolvent that doeε not interfere with the reaction. The solvent that can be used includes ethers such as tetrahydrofuran, dioxane, etc., aromatic hydrocarbons such as benzene, toluene, xylene, etc., amides such as N,N- dimethylformamide, N,N-dimethylacetamide, etc., dimethyl sulfoxide, and so on. This reaction is preferably carried out under basic conditions, e.g. in the presence of potassium carbonate, sodium hydride, potassium hydride, potasεium t-butoxide, or the like. The proportion of compound (V ) with reεpect to compound (IV') iε about 1-5 molar equivalents and preferably about 1.1-2.5 equivalents. When a base is used, its proportion is about 1-5 equivalents, preferably 1.1-3 equivalents, based on compound (IV ) . The reaction temperature may range from about 10°C to the boiling point of the solvent used and is preferably about 20°C-130°C. The reaction time ranges from several minutes to a few days and preferably from about 15 minutes to about 2 days. (d) The hydroxyl group in the εtarting compound can be εubstituted by various kinds of groupε . The reaction is carried out in an appropriate solvent, e.g. dimethylformamide (DMF), acetonitrile, acetone. To the solution of the starting compound is added halide such as alkyl halide, e.g. propyl iodide, isobutyl iodide, ethybromo acetate, or aralkyl halide, e.g. benzylchlolide. The mixture is stirred at 0 to 40°C for 2 to 18 hours. For example, in the case of ethyl bromoacetate, the obtained acetic acid ester iε hydrolyzed in an adequate εolvent and baεe, e.g. iN NaOH solution in ethyl alcohol, at room temperature for 2 to 12 hours. The acetic acid compound is disεolved in an adequate solvent, e.g. tetrahydrofuran (THF). To the solution is added isobutyl chloroformate in the presence of an adequate base, e.g. Et 3 N, and the reaction is carried out at 0°C for 1 to 4 hours. To the εolution is added adequate amine derivatives, e.g. methylamine, propylamine, piperidine. The reaction is carried out at 0°C to room temperature for 1 to 12 hours. Said starting compound which has a hydroxyl group is produced by acid-hydrolysis of a compound such as one having an alkoxy group. The acid hydrolysis is carried out in a conventional manner such as by adding IN hydrochloric acid in an appropriate solvent such as tetrahydrofuran or alcohol, e.g. methanol, ethanol, at 0°C to room temperature for one to 10 hours. (e) The present compound (I'), wherein WR 1 is an alkanoyl- phenyl group can be produced by the introduction of a alkanoyl-phenyl group to the halogenated compound (WR 4 =Br) . The halogenated compound is obtained by the halogenation reaction with the starting compound (WR =H) . The halogenation is carried out in an adequate solvent, e.g. carbontetrachloride or chloroform. To the solution is added N-bromosuccinimide and catalytic amount of 2,2'- azobis- ( isobutyronitrile) . The reaction is carried out at 100 to 120°C for 1 to 4 hours. The introduction reaction of alkanoyl phenyl group iε carried out in an appropriate degased solvent, e.g. dimethoxyethane (DME) . To the εolution iε added alkanoyl phenyl borate, palladium compound, e.g. Pd(PPh 3 ) 4 (Ph=phenyl) and sodium carbonate (2M, Na 2 C0 3 ) . The alkanoyl phenyl borate is synthesized by the reaction of alkanoyl phenyl bromide with adequate borate, e.g. ( i- PrO) 3 B(Pro=propyl) in the presence of adequate base, e.g. BuLi (Bu=butyl) . The introduction reaction is carried out at room temperature to 120 C C for 1 to 12 hours under inert gas atmosphere. (f) The present compound (I'), wherein WR' is alkylphenyl group can be produced by the similar manner as shown in (e) with alkyl phenyl borates instead of alkanoyl phenyl borates . Any other group in the compound can be introduced by any known per se known methodε . 3 (g) The present compound (I), wherein R is an alkoxycarbonyl group, can be produced by introducing a cyano group, and then subjecting the obtained compound to esterification. In the reaction of the introduction of cyano group, the εtarting compound is disεolved in an appropriate εolvent, e.g. dimethylεulfoxide (DMSO), and to the εolution iε added sodium cyanide. The reaction is carried out at 40 to 60°C for 2 to 12 hourε. The eεterification reaction iε carried out in an appropriate solvent εuch as ethyl alcohol. The reaction is conducted by mixing the starting compound and alcohol solution, e.g. ethyl alcohol, saturated with hydrochloric acid. The reaction is carried out at 80 to 120°C for 12 to 48 hours. (h) The present compound (I'), wherein R is an alkyl group which is substituted by a group -NH-S0 2 -R , wherein R is the same meaning aε defined above, can be εynthesized by (i) halogenation of thiε alkyl group and (ii) nucleophilic substitution of this halogen with a sulfonamide compound in the presence of appropriate base, e.g. sodium hydride. The halogenation is carried out in an appropriate solvent, e.g. carbon tetrachloride. To the solution is added N-bromoεuccinimide or catalytic amount of 2,2'- azobis (iεobutyronitrile) . The reaction is carried out at 100 to 120°C for 1 to 4 hourε. The nucleophilic εubstitution reaction is carried out in a similar manner as described in the above procesε (P) on the reaction of the compound (IV) and (V ) . Particularly, in an appropriate εolvent εuch as N,N-dimethylformamide (DMF). To the εolution is added sodium hydride washed with n-hexane and sulfonamide derivativeε, e.g. methanesulfonamide, ethanesulfonamide, benzeneεulfonamide. The reaction is carried out at 0 to 40°C for 1 to 24 hours. (i) The compound (I') wherein R is hydrogen, that is to say compound (VII) or (VII'), or a salt thereof, can be obtained by subjecting the compound (IV) or (VI), or a salt thereof, aε produced in the above manner to a reaction for conversion of R to hydrogen. The reaction for converting R to hydrogen or from eεters to carboxylic groupε may for example be a alkali-hydrolyεiε reaction. This hydrolysiε reaction is conducted by reacting compound (IV) or (VI), or a salt thereof, with a base in a solvent that does not interfere with the reaction. The solvent that can be uεed for this reaction includes alcohols such as methanol, ethanol, isopropyl alcohol, etc., etherε εuch aε tetrahydrofuran, dioxane, etc., amides such aε N,N- dimethylformamide, N,N-dimethylacetamide, etc., and dimethyl εulfoxide, among others. The base that can be used includes alkali metal hydroxideε such as lithium hydroxide, sodium hydroxide, potassium hydroxide, etc., alkaline earth metal hydroxides such as calcium hydroxide, barium hydroxide, etc., and alkali metal carbonates such as potasεium carbonate, εodium carbonate, etc. The proportion of the baεe to compound (IV) or (VI) iε about 1-10 molar equivalents and preferably about 1.5-5 equivalents. The reaction temperature may range from about 10°C to the boiling point of the solvent used and is preferably about 15°- 100°C. The reaction time is several minutes to a few dayε and preferably about 15 minutes to two days. The compound of the item (28) aforementioned can be produced by subjecting a starting compound (I') in which R is alkoxycarbonyl-methyl to an alkali- hydrolyεiε aε mentioned above. (j) The preεent compound (I'), wherein R is the optionally substituted hydrocarbon residue such as pivaloyloxymethyl or 1-(cyclohexyloxycarbonyloxy)ethyl can be synthesized by the condensation reaction of the compound (I',R 2 =H) with chloride agents (e.g. pivaloyloxymethyl chloride, 1- (cyclohexyloxycarbonyloxy)ethyl-l-chloride) or acid anhydride agents, e.g. pivalic anhydride, in an appropriate solvent, e.g. dimethylformamide (DMF), in the presence of adequate base (e.g. K 2 C0 3 ) and potassium iodide (KI) . The reaction is carried out at 0°C to room temperature for 2 to 24 hours. The starting compounds (II') and (III), as well as salts thereof, which are to be employed in the above production processes can be produced typically by the following alternative processes A and B. 1. Process A In this process, either a compound of the general formula (VIII) or a salt thereof or a compound of the general formula (VIII') or a salt thereof is reacted with an isocyanic acid ester derivative. wherein R , R*, R , W, and n are as defined hereinbefore, . . 3 14 wherein R and R are as defined as hereinbefore. The isocyanic acid derivative mentioned above may for example be an isocyanate derivative of the formula R OOC-(CH 2 ) n -NCO, wherein R^ and n are as defined hereinbefore. The reaction of compound (VIII) or compound (VIII'), or a salt thereof, with said isocyanate derivative is carried out in a solvent which doeε not interfere with the reaction, e.g. tetrahydrofuran, pyridine, dioxane, benzene, dichloromethane, 1,2- dichloroethane, toluene, xylene, etc, at about 15-130°C and preferably at about 25-130°C. The isocyanate derivative is used in a proportion of about 1-5, preferably about 1.1-2.5 molar equivalents, relative to compound (VIII) or (VIII'). The reaction time is several minutes to a few days and preferably about 15 minutes to about 2 days. 2. Process B This process comprises reacting compound (VIII) or (VIII'), or a salt thereof, with phosgene or the equivalent, e.g. triphosgene of bis(trichloromethyl) carbonate or the like, diphosgene of trichloromethyl chloroformate or the like, etc, to give the isocyanate derivative and adding an amine, e.g. a compound of the formula R OOC-(CH 2 )n-NH 2 , where R ' and n are as defined hereinbefore. The reaction between compound (VIII) or (VIII'), or a salt thereof, and phosgene or the equivalent is conducted in a solvent that does not interfere with the reaction, e.g. dioxane, tetrahydrofuran, benzene, toluene, xylene, 1 , 2-dichloroethane, chloroform, etc, at about 15-130°C and preferably at about 25-130°C. Phosgene or the equivalent thereof is used in a proportion of about 0.5-2 molar equivalents, preferably about 0.9-1.1 equivalents, with respect to compound (VIII) or (VIII' ) . The reaction time is several minutes to a few days and preferably about 15 minutes to about two days . The amine addition reaction is carried out in a solvent that does not interfere with the reaction, e.g. pyridine, tetrahydrofuran, dioxane, benzene, dichloro¬ methane, 1,2-α.ichloroethane, toluene, xylene, etc, at about 15-130°C and preferably at about 25-130°C. The amine is used in a proportion of about 1-5 molar equivalents, preferably about 1.1-3 equivalents, with respect to compound (VIII) or (VIII'). The reaction time is several minutes to a few dayε and preferably about 15 minutes to about two days. The compound (VIII) or a salt thereof for use in the above reaction can be produced by the following process . A ketone having an active methylene group, e.g. a compound (IX) of the formula R 3 -CO-CH 2 -WR*, where R 3 , R Λ and W are as defined hereinbefore, is reacted with a cyanoacetic ester derivative and sulfur according to the method of K. Gewald, E. Schinke and H. Bettcher, Chem. Ber., 91, 94-100, 1966, to give compound (VIII) or a salt thereof. Thus, the above-mentioned ketone and the cyanoacetate derivative are heated together under reflux in a solvent that does not interfere with the reaction, e.g. benzene, toluene, etc, in the presence of acetic acid and ammonium acetate to give the alkylidenecyanoacetate derivative which is then heated in a solvent that does not interfere with the reaction, e.g. methanol, ethanol, etc, in the presence of sulfur and a base, e.g. an organic base such as triethylamine, ethyldiisopropyla ine, dimethyi¬ aminopyridine, etc, at a temperature of about 50-80°C to give 2-aminothiophene derivative i.e. Compound (VIII). Compound (VIII') can be synthesized by the method of K. Gewald (Chem. Ber., 9J . , 3571-3577 (1965) (K. Gewald) and Chem. Ber., 9_9, 2712-2715 (1966) (K. GewaJd and E. Schinke) . In this εpecification, "the present compound" meanε the compoundε of this invention, such as the compound (I), the compound (I') and the compound of the above item (28). The εalt of the preεent compound thuε obtained is preferably a physiologically acceptable acid addition salt. Such addition salt may for example be any of salts with inorganic acids, e.g. hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid, phosphoric acid, etc, and salts with organic acids, e.g. formic acid, acetic acid, trifluoroacetic acid, fumaric acid, oxalic acid, tartaric acid, maleic acid, citric acid, succinic acid, malic acid, methanesulfonic acid, benzenesulfonic acid, etc. Where the present compound of the invention has an acidic group such as -COOH, the present compound may form salts with inorganic bases, e.g. alkali metals or alkaline earth metals such as sodium, potassium, calcium, magnesium, etc, or ammonia, or organic bases, e.g. trimethylamine, triethylamine, pyridine, picoline, ethanolamine, diethanolamine, triethanolamine, dicyclohexylamine, N,N'-dibenzylethylenediamine, etc. The compound or εalt of the invention as produced by the above-described technology can be isolated and purified by the conventional procedureε such as recrystallization, distillation, and chromatography, among other fractionation techniques . Where the present compound is obtained as a free compound, it can be converted to a salt by a per se known method or any method analogous therewith. Conversely where a salt is obtained, it can be converted to the free compound or a different salt by a per se known method or any method analogous therewith. The salts of the compounds (II) to (IX) can also be salts similar to the salts of compound (I). Where the present compound or salt of the invention is an optically active compound, it can be fractionated into the d- and C -compounds by a conventional optical resolution technique. The preεent compound has only a low toxic potential and can, therefore, be safely used. The endothelin antagonist composition of the present invention has remarkably potent endothelin receptor antagoniεt activity and can be administered as an endothelin antagonist to mammals, e.g. rat, mouse, rabbit, cat, dog, bovine, equine, and human being. Specifically, it can be used safely as a therapeutic drug for acute renal failure, myocardial infarction, liver disorder, angina pectoris, cerebral infarction, cerebrovasospas , hypertension, kidney disease, asthma, ectopic angina, Raynaud's syndrome, pulmonary hypertension, surgical shock, chronic cardiac insufficiency, atherosclerosis, cardiac hypertrophy and migraine, among other diseases, as a prophylactic or therapeutic drug for organ, e.g. liver, surgery- or transplant-aεsociated organic hypofunction, or as a prophylactic agent for post-PTCA vascular restenosis. Particularly, the composition is of great use as a therapeutic drug for acute renal failure, myocardial infarction, hepatic disorder, hypertension, and pulmonary hypertension, as a prophylactic or therapeutic drug for organ, e.g. liver, surgery- or transplant-associated organic hypo unction, or as a prophylactic drug for post-PTCA vascular restenosis. Furthermore, the compound of the present invention can be uεed as an inhibitor for vasoconstriction, such as an inhibitor for vasoconstriction of coronary artery, coronary vein, cerebrovascular system or pulmonary vascular system. When the present compound or a salt thereof is to be administered to a human being, the compound as such or in the form of a pharmaceutical composition formulated with a suitable pharmacologically acceptable carrier, excipient or diluent can be safely administered orally or non-orally.. The pharmaceutical composition mentioned above may be provided in various dosage forms such as oral dosage forms, e.g. powders, granules, capsules, tablets, etc., injections, drip injections, dosage forms for external application, e.g. nasal dosage forms and transdermal drug delivery systems, and suppositories, e.g. rectal suppoεitorieε, vaginal εuppoεitories . Theεe doεage formε can be manufactured by the established pharmaceutical procedures. The present compound or salt of the invention can be formulated with a dispersant, e.g. Tween 80, Atlas Powder Co., U.S.A., HOC 60, Nikko Chemicals Co., polyethylene glycol, carboxymethylcellulose, εodium alginate, etc., a preεervative, e.g methyl p- hydroxybenzoate, propyl p-hydroxybenzoate, benzyl alcohol, etc., an isotonizing agent, e.g. sodium chloride, mannitol, sorbitol, glucose, etc., and other additives to provide an aqueous injection, or dissolved, suεpended or emulεified in vegetable oil, e.g. olive oil, εeεame oil, cottonseed oil, corn oil, etc., propylene glycol, or the like to provide an oily injection. For the manufacture of oral dosage forms, the present compound or salt of the invention is formulated with, for example, an excipient, e.g. lactose, sucroεe, εtarch, etc., a disintegrator, e.g. starch, calcium carbonate, etc., a binder, e.g. starch, gum arabic, carboxymethylcellulose, polyvinylpyrrolidone, hydroxypropylcellulose, etc., and/or a lubricant, e.g. talc, magneεium stearate, polyethylene glycol 6000, etc., and compresεed in the per se conventional manner. Where neceεεary, for masking the taste or insuring enteric or sustained release, the compresεed composition can be coated by the per se known technique to provide an oral doεage form. The coating agent that can be used includeε but iε not limited to hydroxypropylmethylcelluloεe, ethylcelluloεe, hydroxy- methylcelluloεe, hydroxypropylcellulose, polyoxyethylene glycol, Tween 80, Pluronic F68, celluloεe acetate phthalate, hydroxypropylmethylcellulose phthalate, hydroxymethylcellulose acetate succinate, Eudragit, Rohm St Haas Co., Germany; methacrylic-acrylic acid copolymer, and pigments, e.g. red iron oxide, titanium dioxide, etc.. In the manufacture of an enteric release dosage form, it is preferable to provide an intermediate phase between an enteric phase and a drug- containing phase for phase-to-phase isolation. For the manufacture of dosage forms for external application, the present compound or εalt of the invention can be proceεεed into solid, semisolid or liquid preparations. To provide a solid preparation, for inεtance, the present compound or a salt thereof is used as it is or in the form of a powdery compoεition formulated with an excipient, e.g. glycol, mannitol, εtarch, microcrystalline cellulose, etc., a thickener, e.g. natural gums, cellulose derivatives, acrylic polymers, etc., and other additives. A liquid preparation can be substantially similar to the injection mentioned above and may be an oily or aqueous suεpension. The semisolid preparation can be an aqueous or oleaginous gel or ointment. To any of these preparations, a pH control agent, e.g. carbonic acid, phosphoric acid, citric acid, hydrochloric acid, sodium hydroxide, etc. and an antiseptic, e.g. p- hydroxybenzoic esters, chlorobutanol, benzalkonium chloride, etc. can be added. For the production of suppositories, the present compound or salt of the invention can be processed into oleaginous or hydrous solid, semisolid or liquid suppositories in accordance with per se known production procedures . The oleaginous base that can be used for the above composition includes higher fatty acid glycerides, e.g. caccao butter, witepsols, Dynamite Nobel, Germany, medium fatty acid glycerideε, e.g. miglyols, Dynamite Nobel, Germany, etc., and vegetable oils, e.g. sesame oil, soybean oil, cottonseed oil, etc.. The water-soluble base includes polyethylene glycols, propylene glycol, and the hydrogel base that can be used includes natural gums, cellulose derivatives, vinyl polymers, acrylic polymerε, and εo on. The daily doεage of the present compound varies with the severity of illness, the recipient's age, sex, body weight, and senεitivity, administration time and interval, the property, recipe, and type of doεage form, and εpecieε of active ingredient, among other variableε, and cannot be εtated in general termε. Usually, however, the recommended doεage is about 0.01- 10 mg, preferably about 0.03-3 mg, per kilogram body weight of the mammal and the above amount is uεually adminiεtered once or in up to 4 divided doεes a day. The compound of the present invention has particu¬ larly high endothelin receptor antagonist activity. Moreover, the compound is highly amenable to oral administration and features a sustained action. The following examples are intended to describe the present invention in further detail and should by no means be construed as defining the scope of the invention. The H-NMR spectra shown were determined with a Varian Gemini 200 (200 MHz) εpectrometer or Bruker AM- 500 (500 MHz) εpectrometer uεing tetramethylεilane as internal standard and all δ values were expressed in ppm. The symbols used have the following meanings . s: singlet, d: doublet, t: triplet, q: quartet, dt: double triplet, m: multiplet, br: broad, J: coupling constant. Reference Example 1 Production of ethyl 2-amino-4-methyl-5-(4-methoxy- phenyl)thiophene-3-carboxylate: A mixture of 4-methoxyphenylacetone (16.5 g, 0.10 mol), ethyl cyanoacetate (12.2 g, 0.10 mol), ammonium acetate (1.55 g, 20 mmol), acetic acid (4.6 ml, 80 mmol), and benzene (20 ml) was refluxed for 24 hours, with the byproduct water being removed with a Dean- Stark trap. After cooling, the reaction mixture was concentrated under reduced presεure and the reεidue was distributed between dichloromethane and sodium hydrogen carbonate-water. The organic layer waε waεhed with NaCl-water and dried (MgS0 4 ) and the εolvent waε diεtilled off under reduced preεsure. The reεidue was dissolved in ethanol (30 ml), and εulfur (3.21 g, 0.10 mol) and diethylamine (10.4 ml, 0.10 mol) were added. Thiε mixture waε εtirred at 50-60°C for 2 hours and then concentrated and the residue was extracted with ethyl acetate. The extract was washed with NaCl-water and dried (MgS0 4 ) and the solvent was distilled off under reduced pressure. The residue was purified by εilica gel column chromatography and crystallized from ether-hexane to provide light-yellow platelets (11.5 g, 40%). m.p. 79-80°C. Elemental analysiε for C 15 H 17 N0 3 S C (%) H (%) N (%) S (%) Calcd.: 61.83; 5.88; 4.81; 11.01 Found : 61.81; 5.75; 4.74; 10.82 ^-NMR (200 MHz, CDC1 3 ) δ: 1.37 (3H, t, J=7.1 Hz), 2.28 (3H, s), 3.83 (3H, ε), 4.31 (2H, q, J=7.1 Hz), 6.05 (2H, br ε), 6.91 (2H, d, J=8.8 Hz), 7.27 (2H, d, J=8.8 Hz) . IR (KBr): 3426, 3328, 1651, 1586, 1550, 1505, 1485 FAB-MS m/z: 291 (M + ) . Reference Example 2 (1) Production of ethyl 2 ,4 ( IH, 3H)-dioxo-6-(4-methoxy- phenyl)thienof2,3-d]pyrimidine-3-acetate: To a pyridine solution (30 ml) of the ethyl 2- amino-4-methyl-5-(4-methoxyphenyl)thiophene-3- carboxylate obtained in Reference Example 1 (8.00 g, 27.0 mmol) was added ethyl isocyanatoacetate (4.54 ml, 40.5 mmol) dropwise and the mixture was stirred at 50°C for 2 hours. This reaction mixture was concentrated to drynesε and the reεidue waε diεtributed between ethyl acetate and ammonium chloride-water. The aqueouε layer waε extracted with ethyl acetate. The extractε were combined, waεhed with NaCl-water, and dried (MgS0 4 ) and the εolvent waε diεtilled off under reduced preεεure. The residue waε suspended in ethanol (100 ml) and following addition of potasεium tert-butoxide (6.06 g, 54.0 mmol), the εuεpension was stirred at room temperature for 3 hours. To this reaction mixture was added 1N-HC1 (50 ml) with ice-cooling and the ethanol was distilled off under reduced pressure. The resulting crystals were collected by filtration, rinsed with water-ethanol, and dried in vacuo over phosphorus pentoxide to provide white powders (11.0 g, 96%). For uεe as a εample for elemental analyεiε, the above powderε were recryεtallized from ethanol to provide colorless crystalε . m.p. 164-165°C. (2) Uεing ethyl 2-amino-4-methylthiophene-3- carboxylate, the procedure of Reference Example 2 (1) waε repeated to provide ethyl 2 ,4( IH,3H)-dioxo-5- methylthieno[2,3-d]pyrimidine-3-acetate. Yield 94%, amorphouε . (3) To a solution of ethyl 2 ,4( IH,3H)-dioxo-5- methylthieno[2.3-d]pyrimidine-3-acetate obtained in the above item (2) in chloroform was added N- bromoεuccinimide. Then the mixture was refluxed for 2 hourε to provide ethyl 2,4 ( IH, 3H)-dioxo-5-methyl-6- bromothieno[2 ,3-d]pyrimidine-3-acetate. Yield 86%, amorphous . Reference Example 3 Production of ethyl 2,4( IH, 3H)-dioxo-6-(4-hydroxy- phenyl)-5-methylthieno[2, 3-d]pyrimidine-3-acetate: To an ice-cooled mixture of aluminum chloride (2.90 g, 21.7 mmol), methyl disulfide (2.45 ml, 27.2 mmol), and dichloromethane (60 ml) was added a solution of the compound obtained in Reference Example 2 (2.0 g, 5.34 mmol) in dichloromethane (40 ml) dropwise and the mixture was stirred at room temperature for 20 hours. The reaction mixture was then poured in ice-water and the dichloromethane was distilled off under reduced preεεure. This suεpenεion was extracted with ethyl acetate and the extract was washed with NaCl-water and dried (MgS0 4 ) . The solvent was then distilled off under reduced presεure and the residue was purified by silica gel column chromatography to provide white powders (1.64 g, 85%) . For use as a sample for elemental analysiε, the powderε were recryεtallized from ethyl acetate to provide colorleεε cryεtals . m.p. 240-242°C. Elemental analyεis for C 17 H 16 N 2 0 5 S« 0.1H 2 0 C (%) H (%) N (%) Calcd.: 56.38; 4.51; 7.73 Found : 56.28; 4.48; 7.64 *H-NMR (200 MHz, DMSO-d 6 ) δ: 1.22 (3H, t, J=7.1 Hz), 2.37 (3H, ε), 4.15 (2H, q, J=7.1 Hz), 4.59 (2H, ε), 6.85 (2H, d, J=8.6 Hz), 7.26 (2H, d, J=8.6 Hz), 9.73 (IH, ε), 12.39 (IH, s) . IR (KBr): 3356, 2992, 1720, 1690, 1667, 1611, 1593, 1568, 1537, 1502 cm "1 . Reference Example 4 Production of ethyl 2 ,4 ( IH, 3H)-dioxo-6-(4-hydroxy- phenyl)-1-(2-methylthiobenzyl)-5-methylthieno[2,3-d]- pyrimidine-3-acetate: To a solution of the compound obtained in Reference Example 3 (0.60 g, 1.66 mmol) in pyridine (8 ml) was added acetic anhydride (3 ml, 31.8 mmol) and the mixture was stirred at room temperature for 3 hours . This reaction mixture was concentrated and the residue was diεtributed between ethyl acetate and diluted hydrochloric acid. The aqueous layer was extracted with ethyl acetate. The organic layerε were combined, washed with NaCl-water, and dried (MgS0 4 ) and the εolvent waε diεtilled off under reduced presεure. The residue waε purified by εilica gel column chromatography to provide a white amorphous solid (0.57 g) . To a solution of this amorphous solid in dimethylformamide (5 ml) were added potassium carbonate (0.38 g, 2.75 mmol) and 2-methylthiobenzyl chloride (0.65 g, 4.15 mmol) and the mixture was stirred at room temperature for 22 hours. This reaction mixture was concentrated and the reεidue was distributed between ethyl acetate and NaCl-water. The aqueous layer was extracted with ethyl acetate. The organic layers were combined, waεhed with NaCl-water, and dried (MgS0 4 ) and the εolvent waε distilled off under reduced pressure. The residue was purified by silica gel column chromatography to provide a white amorphous solid (0.60 g) . This amorphous εolid was diεεolved in methanol (18 ml)-tetrahydrofuran (12 ml) and a solution of potaεεium carbonate (0.313 g, 2.26 mmol) in water (8 ml) waε added dropwiεe. The mixture was stirred at room temperature for 30 minutes and after lN-hydrochloric acid (5 ml) was added under ice-cooling, the mixture was extracted with ethyl acetate. The extract was washed with NaCl-water and dried (MgSO,,), and the εolvent was distilled off under reduced pressure. The reεidue waε cryεtallized from ether to provide colorless crystalε (4.33 g, 78%). m.p. 177-178°C. Elemental analyεis for C 25 H 24 N 2 0 5 S 2 » l/10H 2 O C (%) H (%) N (%) Calcd.: 60.25; 4.89; 5.62 Found : 60.09; 4.66; 5.57 X H-NMR (200 MHz, CDC1 3 ) δ: 1.32 (3H, t, J=7.2 Hz), 2.45 (3H, s), 2.52 (3H, ε), 4.28 (2H, q, J=7.2 Hz), 4.87 (2H, s), 5.28 (2H, s), 5.75 (IH, ε), 6.78 (2H, d, J=8.6 Hz), 6.97-7.14 (4H, m) , 7.21-7.34 (2H, m) . IR (KBr): 3346, 2978, 1752, 1700, 1651, 1613, 1591, 1564, 1535, 1481 cm "1 . Reference Example 5 (1) Uεing the compound obtained in Reference Example 3, the procedure of Reference Example 4 was repeated except that 2-chloro-6-fluorobenzyl chloride was used in lieu of 2-methylthiobenzyl chloride to provide ethyl 2,4( IH,3H)-dioxo-6-(4-hydroxyphenyl)-1-(2-chloro-6- fluorobenzyl)-5-methylthieno[2 ,3-d]pyrimidine-3- acetate. Yield 59%, amorphous. (2) Using the compound obtained in Reference Example 2 (3), the procedure of Reference Example 4 was repeated to provide ethyl 2,4 ( IH,3H)-dioxo-1-(2- methylthiobenzyl)-5-methylthieno[2,3-d]pyrimidine-3- acetate. Yield 87%, amorphouε . Reference Example 6 Production of ethyl 2,4( IH,3H)-dioxo-6-( -methoxy- ethoxyphenyl)-1-(2-methylthiobenzyl)-5- methylthieno[2 , 3-d]pyrimidine-3-acetate: To a suspenεion of εodium hydride (60% in oil, 500 mg, 12.5 mmol) in dimethylformamide (20 ml) waε added a solution of the compound obtained in Reference Example 4 (2.0 g, 3.7 mmol) in dimethylformamide (30 ml) dropwise in a nitrogen gas εtream under ice-cooling. The mixture waε εtirred at the εame temperature for 30 minuteε and, then, chloromethyl methyl ether (1.0 g, 12.4 mmol) was added dropwise. This mixture was εtirred at room temperature for 16 hourε and then concentrated, and the reεidue waε diεtributed between ethyl acetate and aqueous ammonium chloride solution. The aqueous layer was extracted with ethyl acetate. The extracts were combined, washed with NaCl-water, and dried (MgS0 4 ) and the solvent was distilled off under reduced pressure. The reεidue waε purified by εilica gel column chromatography and recryεtallized from ethyl acetate-hexane to provide colorleεs cryεtals (1.05 g, 59%). m.p. 133-134°C. Elemental analysiε for C 27 H 28 N 2 0 6 S C (%) H (%) N (%) Calcd.: 63.76; 5.55; 5.51 Found : 63.48; 5.62; 5.37 : H-NMR (300 MHz, CDCl 3 ) δ: 1.30 (3H, t, J=7.1 Hz), 1.43 (3H, t, J=7.0 Hz), 2.49 (3H, ε), 3.87 (3H, ε), 4.05 (2H, q, J=7.0 Hz), 4.25 (2H, q, J=7.1 Hz), 4.83 (2H, ε), 5.24 (2H, ε), 6.86-6.94 (4H, m) , 7.09-7.14 (IH, ), 7.22-7.31 (3H, m) . IR (KBr): 2984, 1758, 1707, 1665, 1607, 1562, 1535, 1477 cm "1 . Reference Example 7 The compound obtained in Reference Example 5 waε reacted with 2-chloro-6-fluorobenzyl chloride in lieu of chloromethyl methyl ether to provide ethyl 2,4(lH,3H)-dioxo-6-(4-isobutoxyphenyl)-l-(2-chloro-6- fluorobenzyl)-5-methylthieno[2,3-d]pyrimidine-3- acetate. Yield 29%, amorphous. Reference Example 8 Production of ethyl 2,4( IH,3H)-dioxo-5- bromomethyl-1-(2-methylthiobenzyl)-6-(4- methoxy ethoxyphenyl)thieno[2,3-d]pyrimidine-3-acetate: A mixture of the compound obtained in Reference Example 6 (1.20 g, 2.22 mmol), N-bromosuccinimide (0.4 g, 2.25 mmol), α,c '-azobiεisobutyronitrile (50 mg) , and carbon tetrachloride (50 ml) waε refluxed for 4 hours. After cooling, the inεolubles were filtered off and the filtrate waε diluted with dichloromethane. The organic layer was waεhed with NaCl-water and dried (MgS0 4 ) and the εolvent was distilled off under reduced presεure to provide a yellow amorphouε solid (2.0 g) . ^-NMR (300 MHz, CDCl 3 ) δ: 1.28 (3H, t, J=7.2 Hz), 2.53 (3H, s), 3.50 (3H, s), 4.26 (2H, q, J=7.2 Hz), 4.80 (2H, s), 4.89 (2H, ε), 5.22 (2H, ε), 5.36 (2H, ε) , 7.00-7.50 (8H, m) . Reference Example 9 Production of ethyl 2,4 ( IH, 3H)-dioxo-6-(4-methoxy- phenyl)-1-(2-methylthiobenzyl)-5-methylthieno[2,3-d]- pyrimidine-3-acetate: To a εolution of the compound obtained in Reference Example 2 (2.0 g, 5.35 mmol) in dimethylformamide (25 ml) were added potaεsium carbonate (1.1 g, 7.98 mmol), potassium iodide (catalyst amount), and 2-methylthiobenzyl chloride (1.2 g, 6.96 mmol) and the mixture was stirred at room temperature for 18 hours. This reaction mixture was concentrated and the residue was diεtributed between ethyl acetate and NaCl-water. The aqueouε layer waε extracted with ethyl acetate. The organic layers were combined, washed with NaCl-water, and dried (MgS0 4 ) and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography to provide a light-yellow amorphous solid (1.8 g, 66%) . Recrystallization from ether gave colorless crystals. m.p. 144-145°C. Reference Example 10 Starting with the compound obtained in Reference Example 2, the procedure of Reference Example 9 was otherwise repeated to provide ethyl 2,4( IH, 3H)-dioxo-6- (4-methoxyphenyl)-1-(2-chloro-6-fluorobenzyl)-5-methyl- thieno[2,3-d]pyrimidine-3-acetate. Yield 95%, amorphous . Reference Example 11 Starting with the compounds obtained in Reference Examples 9 and 10, respectively, the procedure of Reference Example 8 was repeated to provide the following compounds . Compound 1: Ethyl 2 , 4 ( IH, 3H)-dioxo-6-( 4-methoxyphenyl) - l-(2-methylthiobenzyl)-5-bromomethylthieno[2 , 3- d]pyrimidine-3-acetate . Yield 95%, amorphous. Compound 2: Ethyl 2 , 4 ( IH, 3H)-dioxo-6-(4-methoxyphenyl)- 1-(2-chloro-6-fluorobenzyl)-5-bromomethylthieno[2,3- d]pyrimidine-3-acetate. Yield 100%, amorphous. Compound 3: Ethyl 2 , 4 ( IH, 3H) -dioxo-6-( 4- isobutoxyphenyl)-1-( 2-chloro-6-fluorobenzyl) -5- bromomethylthieno[2 , 3-d]pyrimidine-3-acetate. Yield 60%, amorphous. Reference Example 12 In accordance with the similar manner of Reference Examples 6 and 8 the following compounds were obtained. Compound 1: Ethyl 2 , 4 ( IH, 3H) -dioxo-5-bromomethyl- 1- (2-methylthiobenzyl ) -6- ( 4-propoxyphenyl) thieno[2 , 3- d]pyrimidine-3-acetate . amorphous . Reference Example 13 Production of ethyl { 2 ,4 ( IH, 3H)-dioxo-5-methyl-l- (2-methylthiobenzyl) -6-(4- (2-methoxyethyl )phenyl) - thienof2 , 3-d]pyrimidine-3-acetate: To a mixture of ethyl {2 ,4 ( IH, 3H)-dioxo-6-bromo-5- methyl-1-( 2-methylthiobenzyl)thieno[ 2 , 3-d]pyrimidine-3- acetate (1.0 g, 2.07 mmol) obtained in Reference Example 5(2), 4-(methoxyethylphenyl)boronic acid (1.0 g, 5.56 mmol), and 2M sodium carbonate (5.2 ml , 10.4 mmol) in 1, 2-dimethoxyethane (50 ml) was added Pd(PPh 3 ) 4 (Ph denotes phenyl) (358 mg, 0.31 mmol) under argon atmosphere. The mixture was stirred under reflux for 5 hour and filtered through celite. The filterate was partitioned between ethyl acetate and brine. The aqueous phase was separated and extracted with ethyl acetate. The combined extracts were washed with brine, dried over MgS0 4 and concentrated in vacuo. The residue was chromatographed on silica gel with ethyl acetate and n-hexane (1:5 - 1:3) to give the product (860 mg, 77%) as colorless amorphous solid. Recryεtallization from ethyl acetate and nhexane gave product (594 mg) aε colorleεε powder, m.p. 126-128°C. Reference Example 14 Production of ethyl 2,4 ( IH, 3H)-dioxo-5- bromomethyl-1-(2-methylthiobenzyl)-6-(4-(2- methoxyethyl)phenyl)thieno[2,3-d]pyrimidine-3-acetate: A mixture of ethyl 2,4 ( IH,3H)-dioxo-5-methyl-l-( 2- methylthiobenzyl)-6-(4-(2-methoxyethyl) henyl)thieno [2,3-d]pyrimidine-3-acetate (600 mg, 1.11 mmol) obtained in Reference Example 13, N-bromosuccinimide (198 mg, 1.11 mmol) and 2,2 '-azobiεiεobutyronitrile (18 mg, 0.11 mmol) in chloroform (30 ml) waε εtirred under reflux for 1.5 hour. The mixture waε partitioned between CH 2 Cl 2 +brine. The organic layer was εeparated and washed with brine, dried over MgS0 4 and concentrated in vacuo to afford a pale yellow amorphouε (730 mg, 44% purity) . Reference Example 15 Production of ethyl 2,4 ( IH, 3H)-dioxo-6-(4-methoxy- phenyl)-1-(2-methylthiobenzyl)-5- (cyanomethyl)thieno[2 , 3-d]pyrimidine-3-acetate: In dimethyl sulfoxide (DMSO) (3 ml) was dissolved the compound obtained in Reference Example 11 (1) (0.67 g, 1.0 mmol) followed by addition of sodium cyanide (50 mg, 1.0 mmol) and the mixture was stirred at 60°C for 6 hours. After cooling, this reaction mixture was poured in iced water (100 ml) and extracted with ethyl acetate (50 ml) and methylene chloride (100 ml, twice). The extracts were pooled, washed with NaCl-water, and dried (MgS0 4 ) and the solvent was distilled off under reduced presεure. The residue was purified by silica gel column chromatography to provide a light-yellow amorphous solid (0.20 g, 38%). X H-NMR (300 MHz, CDC1 3 ) δ: 1.33 (3H, t, J=7.1 Hz), 2.52 (3H, ε), 3.82 (3H, s), 3.94 (2H, s), 4.25 (2H, q, J=7.1 Hz), 4.88 (2H, s), 5.38 (2H, s), 6.95 (2H, d), 7.05 (IH, d), 7.17 (IH, t), 7.34 (2H, d), 7.20-7.40 (2H, m) . IR (KBr): 2978, 2254, 1676, 1607, 1568, 1539, 1483, 1257 cm "1 . The compounds shown in the above Reference Examples are listed in the Table 1. Table 1 Reference R 1 R 2 R 3 R Example No. 2(1) H ethyl H methoxyphenyl 2(2) H ethyl methyl H 2(3) H ethyl methyl bromo 3 H ethyl methyl A-hydroxyphenyl A 2-methylthio- ethyl methyl A-hydroxyphenyl benzyl 5(1) 2-chloro-6- ethyl methyl A-hydroxyphenyl fluorobenzyl 5(2) 2-methylthio- ethyl methyl bromo benzyl 6 2-methylthio- ethyl methyl A-methoxy- benzyl methoxypheny1 7 2-chloro-6- ethyl methyl A-isobutoxyphenyl fluorobenzyl 8 2-methylthio- ethyl bromomethyl A-methoxy- benzyl methoxypheny1 9 2-methylthio- ethyl methyl A-methoxyphenyl benzyl 10 2-chloro-6- ethyl methyl A-methoxyphenyl fluorobenzyl 11(1) 2-methylthio- ethyl bromomethyl A-methoxyphenyl benzyl Reference R 1 R 2 R 3 R Example No. 11(2) 2-chloro-6- ethyl bromomethyl A-methoxyphenyl fluorobenzyl 11(3) 2-chloro-6- ethyl bromomethyl A-isobutoxyphenyl fluorobenzyl 12 2-methylthio- ethyl bromomethyl A-propoxyphenyl benzyl 13 2-methylthio- ethyl methyl A-(2- benzyl methoxyethyl)- phenyl IA 2-methylthio- ethyl bromomethyl A-(2- benzyl methoxyethyl)- phenyl 15 2-methylthio- ethyl cyanomethyl A-methoxyphenyl benzyl Example 1 Production of ethyl 2,4 ( IH,3H)-dioxo-6-(4-methoxy- methoxyphenyl)-1-(2-methylthiobenzyl)-5-(methanesulfon- amidomethyl)thieno[2, 3-d]pyrimidine-3-acetate: To a suspension of sodium hydride (60% in oil; 60 mg, 1.5 mmol) in dimethylformamide (10 ml) was added the compound obtained in Reference Example 8 (0.6 g, 1.0 mmol) as well as methanesulfonamide (0.11 g, 1.2 mmol). The mixture was stirred at room temperature for 16 hours, at the end of which time it was concentrated. The- residue was distributed between ethyl acetate and aqueous ammonium chloride εolution and the aqueouε layer waε extracted with ethyl acetate. The extracts were combined, washed with NaCl-water, and dried (MgS0 4 ) , and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography to provide a light-yellow amorphous solid (0.36 g, 59%). ^-NMR (300 MHz, CDC1 3 ) δ: 1.33 (3H, t, J=7.1 Hz), 2.53 (3H, s), 2.88 (3H, ε), 3.48 (3H, ε), 4.28 (2H, q, J=7.1 Hz), 4.37 (2H, d, J=6.3 Hz), 4.85 (2H, ε), 5.19 (2H, s), 5.36 (2H, s), 6.07 (IH, t), 7.0-7.20 (4H, m) , 7.25-7.40 (4H, m) . Example 2 Production of ethyl 2,4 ( IH,3H)-dioxo-6-(4-methoxy- methoxyphenyl)-1-(2-methylthiobenzyl)-5-(benzenesulfon- amidomethyl)thieno[2, 3-d]pyrimidine-3-acetate: The compound obtained in Reference Example 8 (0.6 g) waε reacted with benzenesulfonamide in lieu of methaneεulfonamide in otherwiεe the same manner aε Example 1 to provide a light-yellow amorphous solid (0.56 g, 83%) . 2 H-NMR (300 MHz, CDC1 3 ) δ: 1.34 (3H, t, J=7.1 Hz), 2.52 (3H, s), 3.50 (3H, s), 4.30 (2H, q, J=7.1 Hz), 4.27 (2H, ), 4.82 (2H, s), 5.21 (2H, s), 5.26 (2H, s), 6.63 (IH, t), 6.97 (IH, d) , 7.08 (2H, d) , 7.17 (IH, dt), 7.25-7.45 (6H, m) , 7.51 (IH, t) , 7.66 (2H, dd) , 7.94 (IH, d) . Example 3 Using the compound obtained in Reference Example 8, 11, 12, 13 and 14, the εimilar procedure as in Example 1 was otherwise repeated to provide the following compounds. Compound 1: Ethyl 2,4(1H,3H)- dioxo-6-(4-methoxyphenyl)-1-(2-methylthiobenzyl)-5- (methaneεulfonamidomethyl)thieno[2,3-d]pyrimidine-3- acetate. Yield 91%, amorphous. Compound 2: Ethyl 2,4( IH,3H)-dioxo-6-(4-methoxyphenyl)- l-(2-chloro-6-fluorobenzyl)-5- (methanesulfonamidomethyl)thieno[2, 3-d]pyrimidine-3- acetate. Yield 33%, amorphouε . Compound 3: Ethyl 2 ,4( IH, 3H)-dioxo-6-(4- iεobutoxyphenyl)-1-(2-chloro-6-fluorobenzyl)-5- (methanesulfonamidomethyl)thieno[ 2 , 3-d]pyrimidine-3- acetate. Yield 29%, amorphous. Compound 4: Ethyl 2 ,4 ( IH, 3H)-dioxo-6-( 4-propoxyphenyl)- l-(2-methylthiobenzyl)-5- (methanesulfonamidomethyl)thieno[2 , 3-d]pyrimidine-3- acetate. Yield 85%, amorphous. Compound 5: Ethyl 2 , 4 ( IH, 3H)-dioxo-6-(4-methoxymethoxy phenyl)-1-(2-methylthiobenzyl)-5- (ethaneεulfonamidomethyl)thieno[2, 3-d]pyrimidine-3- acetate. Yield 89%, m.p. 153-155°C. Compound 6: Ethyl 2 ,4 ( IH,3H)-dioxo-6-(4-methoxymethoxy phenyl)-1-(2-methylthiobenzyl)-5- (propaneεulfonamidomethyl)thieno[2,3-d]pyrimidine-3- acetate. Yield 85%, m.p. 122-123°C. Compound 7: Ethyl 2,4 ( IH,3H)-dioxo-6-(4-propoxyphenyl)- 1-(2-methylthiobenzyl)-5- (isopropanesulfonamidomethyl)thieno[2, 3-d]pyrimidine-3- acetate . Yield 60%, amorphous. Compound 8: Ethyl 2 ,4 ( IH,3H)-dioxo-6-(4-methoxymethoxy phenyl)-l-(2-methylthiobenzyl)-5- (trifluoromethaneεulfonamidomethyl)thieno[2, 3- d]pyrimidine-3-acetate. Yield 58%, amorphouε . Compound 9: Ethyl 2,4 ( IH,3H)-dioxo-6-(4-methoxymethoxy phenyl)-1-(2-methylthiobenzyl)-5- ( iεopropaneεulfonamidomethyl)thieno[2,3-d]pyrimidine-3- acetate. Yield 93%, amorphouε. Compound 10: Ethyl 2,4 ( IH,3H)-dioxo-6-(4- propoxyphenyl)-1-(2-methylthiobenzyl)-5- (ethanesulfonamidomethyl)thieno[2 ,3-d]pyrimidine-3- acetate. Yield 84%, m.p. 132-134°C. Compound 11: Ethyl 2 ,4 ( IH,3H)-dioxo-6-(4-(2- methoxyethyl)phenyl)-1-(2-methylthiobenzyl)-5- (methaneεulfonamidomethyl)thieno[2,3-d]pyrimidine-3- acetate. Yield 59%, m.p. 131-134°C. Example 4 Production of ethyl 2 ,4 ( IH,3H)-dioxo-6-(4-methoxy- phenyl)-1-(2-methylthiobenzyl)-5- (ethoxycarbonylmethyl)thieno[2 , 3-d]pyrimidine-3- acetate: The compound obtained in Reference Example 15 (0.11 g, 0.21 mmol) was disεolved in ethanol (20 ml) followed by addition of saturated HCl-ethanol (10.5 N) (4 ml) and the mixture was refluxed for 48 hours. After cooling, the reaction mixture was distributed between ethyl acetate (50 ml) and saturated NaHC0 3 - water (30 ml). The aqueous layer was re-extracted with ethyl acetate (30 ml). The extracts were combined, washed with NaCl-water, and dried (MgS0 4 ) and the solvent was distilled off under reduced presεure. The residue waε cryεtallized from methanol to provide colorlesε cryεtalε (0.10 g, 84%) . m.p. 117-118°C. Elemental analysis for C 29 H 30 N 2 O 7 S»1/2H 2 0 C (%) H (%) N (%) Calcd.: 58.87; 5.28; 4.73 Found : 58.97; 5.25; 4.65 H-NMR (300 MHz, CDC1 3 ) δ: 1.27 (3H, t, J=7.1 Hz), 1.29 (3H, t, J=7.1 Hz), 2.53 (3H, ε), 3.82 (3H, ε), 3.84 (2H, d), 4.19 (2H, q, J=7.0 Hz), 4.22 (2H, q, J=7.1 Hz), 4.82 (2H, s), 5.34 (2H, s), 6.89 (2H, d), 7.05 (IH, d), 7.15 (IH, t) , 7.25 (2H, d) , 7.32 (2H, t) . Example 5 Production of 2,4( IH, 3H)-dioxo-6-(4- methoxymethoxyphenyl)-1-(2-methylthiobenzyl)-5- (methanesulfonamidomethyl)thieno[2 ,3-d]pyrimidine-3- aretic acid: The compound obtained in Example 1 (0.5 g, 0.83 mmol) was dissolved in tetrahydrofuran (10 ml)-methanol (2 ml) followed by addition of lN-sodium hydroxide- water (2 ml). This mixture was stirred at room temperature for 4 hours, after which IN hydrochloric acid solution (2 ml) was added. The mixture was then concentrated and the residue was distributed between ethyl acetate and aqueous ammonium chloride solution. The aqueous layer was extracted with ethyl acetate. The extracts were combined, washed with NaCl-water, and dried (MgS0 4 ) and the εolvent was distilled off under reduced preεεure. The reεidue was purified by εilica gel column chromatography to give a light-yellow εolid (0.55 g) . Thiε product waε recrystallized from ethyl acetate-isopropyl ether to provide light-yellow crystalε (0.40 g, 76%). m.p. 208-209°C. Elemental analysis for C 26 H 27 N 3 0 8 S 3 « 1/2H 2 0 C (%) H (%) N (%) Calcd.: 50.80; 4.59; 6.83 Found : 50.75; 4.53; 6.79 J H-NMR (300 MHz, DMSO) δ: 2.55 (3H, s), 2.87 (3H, s), 3.41 (3H, s), 4.30 (2H, s), 4.41 (2H, ε), 5.21 (2H, s), 5.24 (2H, s), 6.91 (IH, t), 7.02 (IH, d) , 7.11 (2H, d), 7.15 (IH, d) , 7.33 (IH, t), 7.42 (2H, d). Example 6 Production of ethyl 2,4 ( IH,3H)-dioxo-6-(4- iεobutoxyphenyl)-1-(2-methylthiobenzyl)-5- (methanesulfonamidomethyl)thieno[2, 3-d]pyrimidine-3- acetate: To a solution of ethyl 2 ,4 ( IH, 3H)-dioxo-6-(4- hydroxyphenyl)-1-(2-methylthiobenzyl)-5- (methaneεulfonamidomethyl)thieno[2,3-d]pyrimidine-3- acetate (0.30 g) , which waε synthesized from ethyl 2,4 ( IH, 3H)-dioxo-6-(4-methoxymethoxyphenyl)-1-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)thieno [2,3-d]pyrimidine-3-acetate (which was obtained in Example 1) with IN hydrochloric acid in tetrahydrofuran at room temperature for 3 hours, in dimethylformamide (DMF) (25 ml) was added isobutyliodide (0.30 g) and K 2 C0 3 (0.3 g) . The mixture waε stirred at room temperature for 24 hours. Then the mixture was evaporated in vacuo to give the residue, which was partitioned between ethyl acetate (50 ml) and aq.NH 4 Cl (30 ml). The organic solution was dried with Na 2 S0 4 and evaporated in vacuo to give a yellow amorphous, which was chromatographed on εilica gel to provide a yellow amorphous (0.11 g, 33%). Example 7 Using the compounds obtained in Example 1, the εimilar procedure aε in Example 6 is repeated to provide the following compounds: Compound 1: Ethyl 2,4 ( IH,3H)-dioxo-6-(4- carboxymethoxyphenyl)-1-(2-methylthiobenzyl)-5- (methaneεulfonamidomethyl)thieno[2,3-d]pyrimidine-3- acetate. Yield 70%, amorphous. Compound 2: Ethyl 2,4 ( IH,3H)-dioxo-6-(4- allyloxyphenyl)-1-(2-methylthiobenzyl)-5- (methaneεulfonamidomethyl)thieno[2, 3-d]pyrimidine-3- acetate. Yield 84%, amorphouε. Compound 3: Ethyl 2,4 ( IH,3H)-dioxo-6-(4-butoxyphenyl)- 1-(2-methylthiobenzyl)-5- (methaneεulfonamidomethyl)thieno[2, 3-d]pyrimidine-3- acetate. Yield 82%, amorphous. Compound 4: Ethyl 2, 4 ( IH,3H)-dioxo-5-[4-(2,2,2- trifluoroethoxyphanyl) ]-1-(2-methylthiobenzyl)-5- (methanesulfonamidomethyl)thieno(2, 3-d)pyrimidine-3- acetate. Example 8 Production of ethyl 2,4 ( IH,3H)-dioxo-6-(4- methylamino carbonylmethoxyphenyl)-1-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)thieno [2, 3-d]pyrimidine-3-acetate: The compound 1 obtained in Example 7 waε reacted with iεobutylchloroformate and triethylamine in tetrahydrofuran (THF) at 0°C for three hourε to provide acid anhydride compound, which waε converted to amide derivative with methylamine. Yield 100%, amorphous. Example 9 Uεing the compounds obtained in Example 7, the procedure as in Example 8 was repeated to produce the following compounds: Compound 1: Ethyl 2 ,4 ( IH, 3H)-dioxo-6-(4- propylaminocarbonylmethoxyphenyl)-1-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)thieno [2,3-d]pyrimidine-3-acetate. Yield 95%, amorphous. Compound 2: Ethyl 2 ,4 ( IH, 3H)-dioxo-6-(4- piperazinecarbonylmethoxyphenyl)-l-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)thieno [2,3-d]pyrimidine-3-acetate. Yield 66%, amorphous. Example 10 (1) Production of pivaloyloxymethyl 2,4 ( IH,3H)-dioxo- 6-(4-methoxymethoxyphenyl)-l-(2-methylthiobenzyl)-5- (methaneεuIfonamidomethyl)-thieno[2,3-d]pyrimidine-3- acetate: To an ice-cooled mixture of 2,4( IH, 3H)-dioxo-5- methaneεulfonamidomethyl-6-(4-methoxymethoxypheny1)-1- (2-methylthiobenzyl)thieno[2,3-d]pyrimidine-3-acetic acid obtained in Example 5 (0.25 g, 0.413 mmol), K 2 C0 3 (86 mg, 0.622 mmol) and KI (83 mg, 0.50 mmol) in DMF (8 ml) was added dropwise chloromethyl pivalate (72 ml, 0.50 mmol). After being stirred at 0°C to room temperature for 22 hours, the mixture was concentrated in vacuo and the residue was partitioned between ethyl acetate and brine. The aqueous phase was separated and extracted with ethyl acetate. The combined extracts were washed with brine, dried over MgS0 4 , and concentrated in vacuo. The residue was subjected to silica gel column chromatography by eluting with ethyl acetate - hexane (4:6 - 1:1) to give the product (0.24 g, 80.8%) as a colorless syrup. Crystallization from ethyl acetate-ether-hexane afforded the product (0.203 g, 72.6%) as white crystals. Yield 81%, m.p. 74-77°C. (2) Employing the compound produced in Example 5 as the starting material, in accordance with substantially the same procedure as described the above item (1) of Example 10, the following compound is produced. (R.S)-l-(cyclohexyloxycarbonyloxy)ethyl 2 ,4( IH, 3H)- dioxo-6-(4-methoxymethoxyphenyl)-1-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)thieno [2,3-d]pyrimidine-3-acetate Example 11 Uεing the compoundε obtained in Exampleε 2, 3, 4, 6, 7, 8 or 9, the procedure of Example 5 is otherwise repeated to provide the following compounds . Compound 1: 2,4( IH,3H)-Dioxo-6-(4- methoxymethoxyphenyl)-1-(2-methylthiobenzyl)-5- (benzeneεulfonamidomethyl)thieno[2, 3-d]pyrimidine-3- acetic acid. Yield 68%, m.p. 120-125°C. Compound 2: 2,4( IH,3H)-Dioxo-6-(4-methoxyphenyl)-1-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)- thienof2,3-d]pyrimidine-3-acetic acid. Yield 76%, m.p. 208-209°C. Compound 3: Ethyl 2,4 ( IH,3H)-dioxo-6-(4-methoxyphenyl)- 1-(2-methylthiobenzyl)-5-(carboxylmethyl)thieno[2,3-d]- pyrimidine-3-acetate. Yield 65%, m.p. 243-245°C. Compound 4: 2,4( IH, 3H)-Dioxo-6-(4-methoxyphenyl)-l-(2- chloro-6-fluorobenzyl)-5-(methaneεulfonamidomethyl)- thieno[2,3-d]pyrimidine-3-acetic acid. Yield 57%, amorphouε . Compound 5: 2 ,4( IH,3H)-Dioxo-6-(4-iεobutoxyphenyl)-1- (2-chloro-6-fluorobenzyl)-5-(methanesulfonamidomethyl)- thieno[2,3-d]pyrimidine-3-acetic acid. Yield 30%, m.p, amorphouε . Compound 6: 2,4 ( IH,3H)-Dioxo-6-(4-iεobutoxyphenyl)-1- (2-methylthiobenzyl)-5-(methaneεulfonamidomethyl)- thieno[2,3-d]pyrimidine-3-acetic acid. Compound 7: 2,4 ( IH,3H)-Dioxo-6-(4-propoxyphenyl)-l-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)- thieno[2, 3-d]pyrimidine-3-acetic acid. Yield 84%, amorphous . Compound 8: 2 ,4( IH, 3H)-Dioxo-6-(4-butoxyphenyl)-1-(2- methylthiobenzyl)-5-(methaneεulfonamidomethyl)- thieno[2,3-d]pyrimidine-3-acetic acid. Yield 85%, amorphous . Compound 9: 2, 4 ( IH, 3H) -Dioxo-6-(4-propoxyphenyl) -1-( 2- methylthiobenzyl ) -5-(ethanesulfonamidomethyl )- thieno[ 2 , 3-d]pyrimidine-3-acetic acid. amorphous. Compound 10: 2 , 4 ( IH, 3H) -Dioxo-6-( 4- ( 2- methoxyethyl)phenyl )-1-(2-methylthiobenzyl) -5- ( ethanesulfonamidomethyl )thieno[ 2 , 3-d]pyrimidine-3- acetic acid. Yield 73%, m.p. 167-168°C. Compound 11: 2 , 4 ( IH, 3H) -Dioxo-6-( 4-methoxymethoxy phenyl)-l- ( 2-methylthiobenzyl )-5- ( isopropanesulfonamidomethyl)thieno[2 , 3-d]pyrimidine-3- acetic acid. Yield 64%, m.p. 112-114°C. Compound 12: 2,4 ( IH,3H) -Dioxo-6-(4-methylaminocarbonyl- methoxyphenyl)-l-( 2-methylthiobenzyl ) -5- (methanesulfonamidomethyl)thieno[ 2 , 3-d]pyrimidine-3- acetic acid. Yield 58%, amorphous. Compound 13: 2 , 4 ( IH, 3H) -Dioxo-6-( 4-propylamino carbonylmethoxyphenyl)-1- ( 2-methylthiobenzyl)-5- (methanesulfonamidomethyl )thieno( 2 , 3-d]pyrimidine-3- acetic acid. Yield 81%, amorphous. Compound 14: 2 , 4 ( IH, 3H)-Dioxo-6-( 4-piperazine carbonylmethoxyphenyl) -1-( 2-methylthiobenzyl) -5- (methanesulfonamidomethyl)thieno[ 2 , 3-d]pyrimidine-3- acetic acid. Yield 84%, amorphous. Compound 15: 2 , 4 ( IH, 3H) -Dioxo-6-(4-propoxyphenyl) -1-( 2- methylthiobenzyl)-5-( isopropanesulfonamidomethyl) - thieno[2 , 3-d]pyrimidine-3-acetic acid. Yield 84%, amorphous . Compound 16: 2 ,4 ( IH, 3H)-Dioxo-6-( 4- methoxymethoxyphenyl)-1-(2-methylthiobenzyl) -5- (ethanesulfonamidomethyl)thieno[2,3-d]pyrimidine-3- acetic acid. Yield 80%, m.p. 125-128°C Elemental analysis for C 27 H 2 ,N 3 0 8 S 3 - 1. OH-0 C (%) H (%) N (%) Calcd. : 50.85; 4.90; 6.59 Found : 51.15; 4.78; 6.54 ^-NMR (300 MHz, CDC1 3 ) δ: 1.33 (3H, t, J=7.4 Hz), 2.53 (3H, ε), 2.96 (2H, q, J=7.4 Hz), 3.48 (3H, ε), 4.35 (2H, d, J=6.6Hz), 4.92 (2H, ε), 5.19 (2H, s), 5.36 (2H, s), 6.05 (IH, t, J=6.6 Hz), 7.01-7.37 (8H, m) . IR (KBr): 1702, 1649, 1543, 1487 cm "1 Maεε εpectrum: 620.1 (MH + ) Compound 17: Ethyl 2,4( IH,3H)-dioxo-6-(4- methoxymethoxyphenyl)-1-(2-methylthiobenzyl)-5- (propaneεulfonamidomethyl)thieno[2 , 3-d]pyrimidine-3- acetic acid. Yield 93%, m.p. 123-124°C Compound 18: Ethyl 2,4( IH,3H)-dioxo-6-(4- methoxymethoxyphenyl)-1-(2-methylthiobenzyl)-5- (trifluoro ethaneεulfonamidomethyl)thieno[2,3- d]pyrimidine-3-acetic acid. Yield 52%, amorphouε. Compound 19: 2,4( IH,3H)-Dioxo-6-[4-(2,2,2- trifluoroethoxyphenyl) ]-1-(2-methylthiobenzyl)-5- ( ethaneεulfonamidomethyl)thieno[2 , 3-d]pyrimidine-3- acetic acid. The compounds shown in the above Examples are listed in the Table 2. Table 2 Example No. R 1 R 2 R 3 ' R 4 ' 1 2-methylthio- ethyl methane- methoxymethoxy benzyl sulfonamido 2 2-methylthio- ethyl benzene- methoxy ethoxy benzyl sulfonamido 3(1) 2-methylthio- ethyl methane- methoxy benzyl sulfonamido Example No. R 1 R 2 R 1 ' R* ' 3(2) 2-chloro-6- ethyl m thane- methoxy fluorobenzyl sulfonamido 3(3) 2-chloro-6- ethyl methane¬ isobutoxy fluorobenzyl sulfonamido 3(4) 2-methylthio- ethyl methane- propoxy benzyl sulfonamido 3(5) 2-methylthio- ethyl ethane- methoxymethoxy benzyl sulfonamido 3(6) 2-methylthio- ethyl propane- methoxymethoxy benzyl sulfonamido 3(7) 2-methylthio¬ ethyl isopropane- propoxy benzyl εulfonamido 3(8) 2-methylthio- ethyl trifluoro- methoxymethoxy benzyl methane- sulfonamido 3(9) 2-methylthio- ethyl isopropane- methoxyme hoxy benzyl sulfonamido 3(10) 2-methylthio- ethyl ethane¬ propoxy benzyl sulfonamido 3(11) 2-methylthio- ethyl me hane- 2-methoxyethyl benzyl sulfonamido 4 2-methylthio- ethyl ethoxy¬ methoxy benzyl carbonyl 5 2-methylthio- H methane- methoxymethoxy benzyl sulfonamido 6 2-methylthio- ethyl methane- isobutoxy benzyl sulfonamido 7(1) 2-methylthio- ethyl methane¬ carboxymethoxy benzyl sulfonamido 7(2) 2-methylthio- ethyl methane¬ allyloxy benzyl sulfonamido 7(3) 2-methylthio- ethyl methane- butoxy benzyl sulfonamido 7(4) 2-methylthio- ethyl methane- 2,2,2- benzyl sulfonamido trifluoro- ethoxy 8 2-methylthio- ethyl methane- methylamino- benzyl sulfonamido carbonylmethoxy Example No. R 1 R 2 R 3 ' R " 9(1) 2-methylthio- ethyl methane- propylamino- benzyl sulfonamido carbonyl ethoxy 9(2) 2-methylthio- ethyl methane- piperazine- benzyl sulfonamido carbonylmethoxy 10(1) 2-methylthio- pivaloyloxy¬ methane- methoxymethoxy benzyl methyl sulfonamido 10(2) 2-methylthio- 1- (cyclo¬ methane- methoxymethoxy benzyl hexyloxy¬ sulfonamido carbonyloxy)- ethyl 11(1) 2-methylthio- H benzen- methoxymethoxy benzyl sulfonamido 11(2) 2-methylthio- H methane- methoxy benzyl sulfonamido 11(3) 2-methylthio- ethyl carboxy methoxy benzyl 11(4) 2-chloro-6- H methane- methoxy fluorobenzyl sulfona ido 11(5) 2-chloro-6- H methane- isobutoxy fluorobenzyl sulfonamido 11(6) 2-methylthio- H methane- isobutoxy benzyl sulfonamido 11(7) 2-methylthio- H methane- propoxy benzyl sulfonamido 11(8) 2-methylthio- H methane- butoxy benzyl sulfonamido 11(9) 2-methylthio- H ethane- propoxy benzyl sulfonamido 11(10) 2-methylthio- H methane- 2-methoxyethyl benzyl sulfonamido 11(11) 2-methylthio- H isopropane- methoxymethoxy benzyl sulfonamido 11(12) 2-methylthio- H methane¬ methylamino- benzyl sulfonamido carbonylmethoxy 11(13) 2-methylthio- H methane- propylamino- benzyl sulfonamido carbonylmethoxy 11(14) 2-methylthio- H methane- piperazine- benzyl sulfonamido carbonylmethoxy Example No. R 1 R 2 R R 11(15) 2-methylthio- H isopropane- propoxy benzyl sulfonamide 11(16) 2-methylthio- H ethane- methoxyme hoxy benzyl sulfonamido 11(17) 2-methylthio- H propane- methoxymethoxy benzyl sulfonamido 11(18) 2-methylthio- H trifluoro- methoxymethoxy benzyl methane- sulfonamido 11(19) 2-methylthio- H methane- 2,2,2- benzyl sulfonamido trifluoro- ethoxy Example 12 A tablet is prepared by a conventional method using 100 mg of the compound produced in Example 1, 165 mg of lactose, 25 mg corn starch, 4 mg of polyvinyl alcohol and 1 mg of magneεium εtearate. Example 13 The compound (5 g) produced in Example 1 iε diεεolved in a diεtilled water for injection to make the total volume 100 ml. The εolution iε εubjected to an aseptic filtration uεing a membrane filter of 0.22 micrometer (manufactured by Sumitomo Electric, Japan or by Saltoriuε, Germany). Each 2 ml of the filtrate is placed in a washed and sterilized vial and dried by freezing by a conventional method to prepare a freeze- dried injection of 100 mg/vial . Example 14 A tablet is prepared by a conventional method using 100 mg of the compound produced in Example 5, 165 mg of lactose, 25 mg of corn starch, 4 mg of polyvinyl alcohol and 1 mg of magnesium stearate. Example 15 The compound (5 g) produced in Example 5 is disεolved in a distilled water for injection to make the total volume 100 ml. The solution iε subjected to an aseptic filtration uεing a membrane filter of 0.22 micrometer (manufactured by Sumitomo Electric, Japan or by Saltorius, Germany). Each 2 ml of the filtrate is placed in a washed and sterilized vial and dried by freezing by a conventional method to prepare a freeze- dried injection of 100 mg/vial . Example 16 A tablet is prepared by a conventional method using 100 mg of the compound (5) produced in Example 3, 165 mg of lactose, 25 mg of corn εtarch, 4 mg of polyvinyl alcohol and 1 mg of magnesium stearate. Example 17 The compound (5) (5 g) produced in Example 3 was dissolved in a distilled water for injection to make the total volume 100 ml. The εolution waε εubjected to an aεeptic filtration uεing a membrane filter Of 0.22 micrometer (manufactured by Sumitomo Electric, Japan or by Saltorius, Germany). Each 2 ml of the viltrate waε placed in a washed and sterilized vial and dried by freezing to prepare a freeze-dried injection of 100 mg/vial. Example 18 A tablet iε prepared by a conventional method uεing 100 mg of the compound (16) produced in Example 11, 165 mg of lactoεe, 25 mg of corn starch, 4 mg of polyvinyl alcohol and 1 mg of magnesium stearate. Example 19 The compound (16) (5 g) produced in Example 11 is disεolved in a distilled water for injection to make the total volume 100 ml. The solution is subjected to an aseptic filtration using a membrane filter of 0.22 micrometer (manufactured by Sumitomo Electric, Japan or by Saltorius, Germany). Each 2 ml of the filtrate is placed in a washed and sterilized vial and dried by freezing by a conventional method to prepare a freeze- dried injection of 100 mg/vial. Experimental Example 1 Binding Teεt to ET A receptor expressed in CHO cell: Procedure cells: CHO cell expresεing human ET A 24 endothelin receptor, i.e. ET A 24 cellε medium: DMEM 10% FCS Gin, nonessential amino acids, penicillin, streptomycin Cells were seeded in 12 wells of 24 well plates at a density of 2x10 cells/well (1 ml medium/well). On the next day, [ H]arachidonic acid waε added to each well to be 250 nCi(nanocurie) /ml . On the next day, the medium waε εucked from the wellε by the uεe of an aεpirator to remove free arachidonic acid and floating cellε, and then 0.5 ml of medium waε added. Thiε procedure was repeated again. After allowing to stand for 30 minutes in a C0 2 incubator, the medium was exchanged rapidly. The sample of compound obtained in Example 5 or compound 16 of Example 11 was stepwise diluted with a buffer solution for dilution, containing 3.15x10 " M endothelin-1 (ET-1) {20 mM Triε, 5 mM Mg(AcO) 2 , 2 mM EGTA, 0.03% NaN 3 , 0.1% BSA, 0.05% CHAPS}. 10 μl of the εolution waε added to each well (final concentration of ET-1: 6.3x10 " M) . The maximum reaction value was estimated by adding 10 μl of 3.15xlO "8 M ET-1. The radio activity under no stimulation was estimated by adding the buffer solution for dilution. After allowing to-stand for 30 minutes in the C0 2 incubator, the medium waε completely collected and the radio activity of [ H]arachidonic acid releaεed in the medium was measured by a liquid εcintillation counter. IC 50 values were calculated by hill plot from the concentration and relative reaction value of each εample. Abbreviations : DMEM: Dulbecco's medified Eagle Medium FCS : fetal calf εerum AcO : acetyloxy EGTA: ethyleneglycol bis(2-aminoethyl- ether)tetraacetic acid BSA : bovine εerum albumin CHAPS: 3-[ ( 3-chloroamidopropylJdimethyl- ammonio]-1-propanesulfonate Reεults IC 50 valueε obtained are εhown in Table 3 fTable 3] Teεt compound IC 50 value: μM Compound obtained in 0.39 (n=2) Example 5 Compound 16 of Example 0.11 (n=2) 11 Experimental Example 2 Binding Teεt to ET B receptor expressed in CHO cell: Procedure cellε: CHO cell expreεεing human ET B endothelin receptor, i.e. ET B 12 cells medium: DMEM 10% FCS Gin, nonesεential amino acidε, penicillin, streptomycin Cells were seeded in 12 wellε of 24 well plates at a density of 2xl0 5 cells/well (1 ml medium/well) . On the next day, [ H]arachidonic acid waε added to each well to be 250 nCi(nanocurie) /ml . On the next day, the medium was sucked from the wells by the use of an aspirator to remove free arachidonic acid and floating cells, and then 0.5 ml of medium was added. This procedure was repeated agian. After allowing to stand for 30minutes in a C0 2 incubator, the medium waε exchanged rapidly. The sample of compound obtained in Example 5 or compound 16 of Example 11 waε εtepwiεe diluted with a buffer solution for dilution, containing 3.15x10 M endothelin-1 (ET-1) {20 mM Tris, 5mM Mg(AcO) 2 , 2 mM EGTA, 0.03% NaN 3/ 0.1% BSA, 0.05% CHAPS}. 10 μl of the εolution waε added to each well (final concentration of ET-1: 6.3x10 " M) . The maximum reaction value waε eεtimated by adding 10 μl of 3.15xlO "8 M ET-1. The radio activity under no εtimulation was eεtimated by adding the buffer εolution for dilution. After allowing to-εtand for 30 minuteε in the C0 2 incubator, the medium waε completely collected and the radio activity of [ H]arachidonic acid releaεed in the medium was meaεured by a liquid εcintillation counter. IC 50 values were calculated by Hill Plot from the concentration and relative reaction value of each sample. Results IC 50 values obtained are εhown in Table 4: [Table 4] Teεt compound IC 5 o value: μM Compound obtained in 0.49 (n=2) Example 5 Compound 16 of Example 0.13 (n=2) 11 Experimental Example 3 Inhibition Teεt on coronary artery where ET A iε expreεεed: Procedure 3-mm ring εamples for vehicle group and drug- treating group were prepared by removing fat and connective tiεεue from coronary artery enucleated from porcine heart and obtained from the adjacent portions thereof. The sampleε, hanging in Magnus tube filled with Krebε solution, were εtabilized for 90 minuteε under 2 g of εtatic tenεion. After εubjecting the εamples to constriction for 10 minutes by potasεium chloride (KCl) (60 mM) to obtain the maximum reaction, the samples were then washed and stabilized for 60 minutes . After pre-treating compound obtained in Example 5 or Compound 16 of Example 11 or vehicle (H 2 0) for 30 minutes, ET-1 (2 mM) was added to observe the maximum constriction. The constriction efficiency (% KCl) of ET-1 was calculated as a relative value to KCl constriction of each sample which was regarded as 100%. Further, the inhibiting efficiency was calculated from the constriction efficiency of the drug-treating group calculated aε a relative value to the conεtriction of the vehicle group which waε regarded as 100%. Results The results are shown in Table 5. [Table 5] 7. inhibition (MEAN ± S.E.M. )(n=) Binding artery (ET-1 3nM) IC 50 (μM) Compound 0.1 μM 1 μM ET A Compound in 7.6 ± 37.3 (3) 78.1 ± 11.9 (4) 0.0076 Example 5 Compound 16 of — 33.1 ± 8.6 (4) 0.0061 Example 11 • It is apparent from the results of Table 5 that in the ring εampleε of porcine coronary artery in which ET A iε expreεεed, the compoundε of present invention suppresε vaεcular (εmooth muscle) constriction through the agonist of ET A , i.e. ET-1 (3 nM) . Thuε, it was confirmed that the compounds of present invention are antagonists for ET A receptor. Experimental Example 4 Inhibition Test on coronary vein where ET B is expresεed: Procedure 1 3-mm ring εamples for vehicle group and drug- treating group were prepared by removing fat and connective tiεεue from coronary vein enucleated from porcine heart and obtained from the adjacent portions thereof. The εamples, hanging in Magnus tube filled with Krebs solution, were stabilized for 90 minutes under 0.5 g static tension. After subjecting the εamples to constriction for 10 minuteε by potaεεium chloride (KCl) (60 mM) to obtain the maximum reaction, the εamples were waεhed and εtabilized for 60 minutes. After pre-treating compound obtained in Example 5 or Compound 16 of Example 11 or vehicle (H z O) for 30 minuteε, S6c (1 nM) (S6c: εarafotoxin S6c, peptide type snake toxin consisting of 21 amino acids, it is useful for the εelective agoniεt to ET B receptor owing to the εimilarity of itε structure to endothelin) was added to observe the maximum constriction. The constriction efficiency (% KCl) of S6c was calculated as a relative value to KCl conεtriction of each εample which waε regarded as 100%. Further, the inhibiting efficiency was calculated from the constriction efficiency of the drug-treating group calculated as a relative value to the constriction of the vehicle group which was regarded aε 100%. Reεultε The reεults are shown in Table 6. [Table 6] 7. inhibition (MEAN ± S.E.M.) (n=) Binding vein (S6c 1 nM) IC 50 (μM) Compound 0.1 μM 10 μM ET B Compound in 73.4 ± 3.1 (3) 100 ± 0 (4) 0.100 Example 5 Compound 16 of 53.3 ± 4.4 (4) 98.0 ± 1.1 (4) 0.054 Example 11 It is apparent from the results of Table 6 that in the ring εamples of porcine coronary vein in which ET B is expressed, the compounds of preεent invention εuppreεs vascular (smooth muscle) constriction through the agonist of ET B , i.e. S6c (1 nM) . Thuε, it waε confirmed that the compounds of preεent invention are antagoniεtε for ET B receptor. Experimental Example 5 Binding Test to ET A receptor expreεεed in an insect cell Sf9: Procedure Endothelin (ET) receptors were prepared by diluting fractionε of inεect cell (Sf9) membrane having human endothelin-A (ETA) receptorε expreεεed, with an aεεay buffer {20 mM Tris-HCl, 2 mM EGTA (ethyleneglycol blε(2-aminoethylether) tetra acetic acid), 5 mM magneεium acetate, 0.1% BSA (bovine serum albumin), 0.03% NaN 3 , 0.5 mM PMSF (phenyl methyl sulfonyl fluoride), 20 μg/ml leupeptin, 4 μg/ml E-64 (products of the Peptide Institute, Japan) , 1 μg/ml pepstatin, (pH 7.2)} respectively in a concentration of 1.4 μg/ml in the former case and 0.7 μg/ml in the latte case. To 100 μl of each portion was added 5 nM[ I] endothelin-1 (2 μl). A dimethylsulfoxide solution (3 μl) of the test compound was added thereto and incubated at 25°C for 60 minutes. And, to determine the maximum binding amount (B 0 ) and non-specific binding amount (NSB) , lotε to which a dimethyl sulfoxide solution (3 μl) or a dimethyl sulfoxide solution (3 μl) containing endothelin-1 (10 " M) had been added, were also incubated. These lotε were supplemented with 0.05% CHAPS(3- [ ( 3-chloroamidopropyl)dimethylammonio]-l- propaneεulfonate)-aεεay buffer (1.5 ml), εubjected to filtration through a glaεε fiber filter GF/F (trade name; product of Whatman Ltd. (England)), and then washed with the same buffer (1.5 ml)) . Radioactivity on the filter was counted in a gamma-counter to determine the Percent Maximum Binding (PMB) in accordance with the aforesaid calculation formula. The concentration causing PMB=50% was determined as IC 50 value. IC 50 values of some of the compounds of thiε invention, synthesized in the above¬ mentioned examples, are shown in Table 7. Table 7 Test compound IC 50 value: μM (Compounds are shown by the Human endotherin-A Example No . ) receptor 5 0.013. potassium salt of 5 0.0076 11(7) 0.018 11(9) 0.015 11(11) 0.0066 11(15) 0.011 11(16) 0.0061 11(17) 0.022 According to the result shown in the Table 5, it has been proved that the compound or its salt of the present invention have excellent endothelin receptor antagonistic action to endothelin-B receptor. Experimental Example 6 Binding Test to ET B receptor expressed in an insect cell Sf9: Procedure Endothelin (ET) receptors were prepared by diluting fractions of insect cell (Sf9) membrane having human endothelin-B (ETB) receptors expresεed, with an assay buffer {200 mM Tris-HCl, 2 mM EGTA (ethylenegiycol bis(2-aminoethylether) tetra acetic acid), 5 mM magneεium acetate, 0.1% BSA (bovine εerum albumin), 0.03% NaN 3 , 0.5 M PMSF(phenyl methyl εulfonyl fluoride) , 20 μg/ml leupeptin, 4 μg/ml E-64 (productε of the Peptide Inεtitute), 1 μg/ml pepεtatin, (pH 7.2)} reεpectively in a concentration of 1.4 μg/ml in the former caεe and 0.7 μg/ml in the latter caεe. To 100 μl of each portion waε added 5 nM[ I] endothelin-1 (2 μl). A dimethylsulfoxide solution (3 μl) of the sample was added thereto and incubated at 25°C fpr 60 minutes. And, to determine the maximum binding amount (B 0 ) and non-specific binding amount (NSB), lots to which a dimethyl sulfoxide solution (3 μl) or a dimethyl sulfoxide solution (3 μl) containing endothelin-1 (10 " M) had been added, were also incubated. These lots were supplemented with 0.05% CHAPS(3- [ (3-chloroamidopropyl)dimethylammonio]-l- propanesulfonate)-asεay buffer (1.5 ml), εubjected to filtration through a glaεε fiber filter GF/F (trade name; product of Whatman Ltd. (England)), and then waεhed with the same buffer (1.5 ml). Radioactivity on the filter was counted in a gamma-counter to determine the Percent Maximum Binding (PMB) in accordance with the aforesaid calculation formula. The concentration causing PMB=50% was determined as IC 50 value. IC 50 values of some of the compounds of this invention, syntheεized in the above¬ mentioned exampleε, are εhown in Table 8. Table 8 Test compound IC; 0 value: μM (Compounds are shown by the Human endotherin-B Example No . ) receptor 5 0.20 potassium salt of 5 0.10 11(7) 0.22 11(9) 0.11 11(11) 0.0 0 11(15) 0.094 11(16) 0.054 11(17) 0.047 According to the result shown in the Table 6, it has been proved that the compound or itε salt of the present invention have excellent endothelin receptor antagonistic action to endothelin-A receptor. The potassium salt of the compound of the Working Example 5 was produced by employing the compound of the Working Example 5, potassium carbonate and water- ethanol in a conventional manner. Industrial Applicability The thienopyrimidine derivative of the present invention possesses outstanding endothelin receptor antagonist activity and, therefore, the endothelin antagonist composition containing thiε thienopyrimidine derivative in accordance with the invention can be used with advantage as a prophylactic or therapeutic drug for acute renal failure, myocardial infarction, liver disorder, angina pectoris, cerebral infarction, cerebrovasospasm, hypertension, kidney disease, asthma, ectopic angina, Rayneau syndrome, pulmonary hypertension, surgical shock, chronic heart failure, atherosclerosis, cardiac hypertrophy, migrane, etc., as a prophylactic or therapeutic drug for organ surgery- or graft-associated hypofunction of organs, or as a prophylactic drug for vascular restenosis following percutaneous transluminal coronary angioplasty (PTCA), or as an inhibitor for vasoconstriction of coronary artery, coronary vein, cerebrovascular system or pulmonary vascular system.

Claims: CLAIMS What we claim iε: 1. A thieno[2,3-d]pyrimidine derivative, wherein the thienopyrimidine derivative haε (1) a carboxyl group or an ester thereof and (2) a group other than a carboxyl group which is capable of forming an anion or a group convertible thereinto in its molecule. 2. A compound according to claim 1, wherein the group which is capable of forming anion or a group convertible thereinto other than a carboxyl group is tetrazolyl, an optionally subεtituted εulfonamido group, a phoεphono group or a εulfo group, each of which may optionally be εubεtituted by alkyl or acyl. 3. A compound of the formula: wherein each of R and R are hydrogen or an optionally 3 εubεtituted hydrocarbon reεidue, R iε a Cχ_ 6 alkyl group which is εubεtituted by a Cj_ 6 alkoxy-carbonyl group or a group of the formula: -NH-S0 2 -R , wherein R is (1) a Cj.g alkyl group which may optionally be subεtituted by halogen or (2) a C 6 . 14 aryl group, R is an optionally substituted hydrocarbon residue or an optionally subεtituted heterocyclic group, W denoteε a chemical bond or a εpacer group and n denotes an integer of 1 to 3; or a salt thereof. 4. A compound according to claim 3, wherein R is an optionally subεtituted C 1 . 20 hydrocarbon reεidue. 5. A compound according to claim 4, wherein the C^o hydrocarbon reεidue iε a C^o alkyl, C 3 _ 10 cycloalkyl, C z _ 10 alkenyl, C 6 . ]A aryl or C 7 . 20 aralkyl group. 6. A compound according to claim 4, wherein R is an optionally substituted C 7 - 20 aralkyl group. 7. A compound according to claim 3, wherein R is a hydrocarbon residue optionally substituted with (1) halogen, (2) nitro, (3) cyano, (4) an optionally substituted hydroxyl group, (5) a group of the formula: -S(0)f-R 6 , wherein f denotes an integer of 0 to 2, and R is a hydrogen atom or an optionally substituted hydrocarbon residue, (6) an optionally substituted amino group or (7) an optionally substituted 5- or 6- membered heterocyclic group which contains 1 to 4 heteroatom( s ) of oxygen, sulfur or nitrogen. 8. A compound according to claim 3, wherein R is a hydrocarbon residue optionally substituted with halogen or a Ci-.., alkylthio group. 9. A compound according to claim 3, wherein R is an optionally substituted C 1 . 20 hydrocarbon residue. 10. A compound according to claim 9, wherein R is an optionally substituted C 1 . 10 alkyl, C 3 _ 10 cycloalkyl, C 7 - l0 alkenyl, C 6 - 14 aryl or C 7 - 20 aralkyl group. 11. A compound according to claim 3, wherein R is an optionally substituted C^o alkyl. 12. A compound according to claim 3, wherein R is a hydrocarbon residue optionally substituted with (1) halogen, (2) nitro, (3) cyano, (4) an optionally substituted hydroxyl group, (5) a group of the formula: -S(0)f-R , wherein f denotes an integer of 0 to 2, and R is a hydrogen atom or an optionally substituted hydrocarbon residue, (6) an optionally substituted amino group or (7) an optionally substituted 5- or 6- membered heterocyclic group which contains 1 to 4 heteroato (s) of oxygen, sulfur or nitrogen. 13. A compound according to claim 3, wherein R is a hydrocarbon residue optionally substituted with (1) halogen, (2) nitro, (3) hydroxyl, (4) cyano, (5) C 1-A alkylthio, (6) C^,, alkoxy, (7) C,_ 6 alkyl-carbonyloxy or (8) C 3 - 6 cycloalkyl-oxycarbonyl . 14. A compound according to claim 3, wherein R ' is hydrogen or a C x.6 alkyl group which may be optionally substituted by d .6 alkyl-carbonyloxy or C 3 _ 6 cycloalkyl- oxycarbonyl oxy. 15. A compound according to claim 3, wherein R is a C j - 6 alkyl group which is substituted by a Cι_ 6 alkoxy¬ carbonyl group or a group of the formula: -NH-S0 Z -R , wherein R is a C ] ._ 6 alkyl group or a C 6 . l aryl group. 16. A compound according to claim 3, wherein R is a C j - 6 alkyl group which is substituted by a group of the formula: -NH-S0 2 -R 5 , wherein R 3 is (1) a C^ alkyl group which may optionally be substituted by halogen or (2) a C 6 _u aryl group. 17. A compound according to claim 3, wherein R is a C j . 6 alkyl group which is substituted by a group of the formula: -NH-S0 2 -R , wherein R is a C,- 6 alkyl group or a C 6 -u aryl group. 18. A compound according to claim 3, wherein R' is an optionally substituted C j .^ hydrocarbon residue or an optionally subεtituted 5- to 13-membered heterocyclic group which contains 1 to 4 heteroatom(s) of oxygen, sulfur or nitrogen. 19. A compound according to claim 3, wherein the R is an optionally substituted C 6 . Ul aryl group. 20. A compound according to claim 3, wherein R * is a hydrocarbon residue optionally substituted with (1) halogen, (2) nitro, (3) cyano, (4) C j _ f , alkoxy which may optionally be subεtituted by C,_ fi alkoxy, carboxyl, halogen, C]_ 6 alkyl-carbamoyl or 5 to 7 membered nitrogen-containing heterocyclic group-carbonyl, (5) C 7 - 13 aralkyloxy, (6) C^ alkyl which may be εubstituted by Ci-j alkoxy, (7) C^ alkanoyl, (8) C alkylthio, (9) C 2 . 6 aikenyloxy, (10) C^g alkoxy-carbonyl or (11) C N6 alkyl-carbamoyl . 21. A compound according to claim 3, wherein R * is a hydrocarbon residue optionally substituted with C^g alkoxy which may optionally be substituted by Cj.e alkoxy, carboxyl, halogen, C^ alkyl-carbamoyl or a 5 to 7 membered nitrogen-containing heterocyclic group- carbonyl . 22. A compound according to claim 3, wherein W is a spacer group selected from the group consiεting of (1) C alkylene, (2) C 2 . 6 alkenylene, (3) a group of the formula - (CH 2 )cNR 10 -, where c represents an integer of 0-3, R repreεentε hydrogen or C^ alkyl, (4) -CO-, (5) a group of the formula -CONR -, where R is as defined above, (6) -0-, (7) a group of the formula: -S(0)f-, where f represents an integer of 0 to 2 , and (8) a group of the formula: -NR S(0)e-, where e represents an integer of 0-2; R is as defined above. 23. A compound according to claim 3, wherein W is a chemical bond. 24. A compound according to claim 3, wherein R is a benzyl group which may optionally be substituted by (1) halogen or (2) C^,, alkylthio, R is a hydrogen atom or a C ; -,, alkyl group which may optionally be subεtituted by (1) C j . f , alkyl-carbonyloxy or (2) C 3 . 6 cycloalkyl-oxycarbonyloxy, R is a Ci.g alkyl group which is substituted by (1) a C^ alkoxy-carbonyl group or (2) a group of the formula: -NH-S0 2 -R 5" (wherein R 5" is (1) a C ] _ 3 alkyl group which may optionally be substituted by halogen or (2) a phenyl group, R s a phenyl group which is substituted by (1) C alkoxy which may be substituted by C _ 6 alkoxy, carboxyl, C 1 - 6 alkyl-carbamoyl, piperazinecarbonyl or halogen, (2) C 7 . 8 aralkyloxy, (3) d-« alkyl which may be substituted by d- 3 alkoxy, (4) d- . alkanoyl, (5) C 2 . 4 aikenyloxy, (6) d- 6 alkoxy-carbonyl or (7) d_ 6 carbamoyl . 25. 2,4( lH,3H)-dioxo-6-(4-methoxymethoxyphenyl)-l-(2- methylthiobenzyl)-5-(methanesulfonamidomethyl)- thieno[2, 3-d]pyrimidine-3-acetic acid or its salt. 26. 2,4 ( lH,3H)-dioxo-6-(4-methoxymethoxyphenyl)-l-(2- methylthiobenzyl)-5-(ethanesulfonamidomethyl) - thieno[2,3-d]pyrimidine-3-acetic acid or its εalt. 27. 2,4(lH,3H)-dioxo-6-(4-methoxyphenyl)-l-(2- methylthiobenzyl)-5-(mthanesulfonamidomethyl)- thieno[2, 3-d]pyrimidine-3-acetic acid or its salt. 28. Ethyl 2,4(lH,3H)-dioxo-6-(4-methoxyphenyl)-l-(2- methylthiobenzyl)-5-(carboxymethyl)thieno[2,3- d]pyrimidine-3-acetate. 29. A method for producing a compound as defined in claim 3, which comprises subjecting a compound of the formula: wherein, R , R , W and R have the same meaning as defined in claim 3 and R is a C,- 6 alkyl group which is halogenated or cyanated, to (1) a nucleophilic substitution reaction with a sulfonamide compound when the alkyl of R 3 is halogenated or (2) alkali- hydrolysis and then esterification when the alkyl of R is cyanated. 30. A pharmaceutical composition, which comprises a compound as defined in claim 1, 3 or 28 and a carrier, excipient or diluent therefor. 31. A pharmaceutical composition according to claim 30, which is a therapeutic drug for treating vaεoconεtriction in a mammal. 32. A pharmaceutical compoεition according to claim 31, wherein the vasoconstriction is in a coronary artery, coronary vein, cerebrovascular system or pulmonary vascular system. 33. A pharmaceutical composition according to claim 30, which is for antagonizing endothelin activity. 34. A pharmaceutical composition according to claim 33, which is a therapeutic drug for acute renal insufficiency, cardiac infarction or liver inεufficiency. 35. A pharmaceutical compoεition according to claim 33, which iε a treapeutic drug for hypofunction of an organ caused by a surgery or transplant. 36. A pharmaceutical composition according to claim 35, wherein the organ is liver. 37. A method for treating a mammal suffering from vaεoconεtriction, which comprises administering an effective amount of a compound as defined in claim 1, 3 or 28 to the mammal. 38. A method for treating a mammal suffering from acute renal insufficiency, cardiac infarction or liver insufficiency, which compriseε adminiεtering an effective amount of a compound aε defined in claim 1, 3 or 28 to the mammal. 39. Uεe of a compound aε defined in claim 1, 3 or 28 for producing a pharmaceutical compoεition for the manufacture of a medicament for therapeutic application on vaεoconεtriction. 40. Uεe of a compound aε defined in claim 1, 3 or 28 for producing a pharmaceutical compoεition for the manufacture of a medicament for therapeutic application on acute renal inεufficiency, cardiac infarction or liver insufficiency.

Inventors: CHOH NOBUO, FURUYA SHUICHI, WATANABE TOSHIFUMI, CHOH, NOBUO, FURUYA, SHUICHI, WATANABE, TOSHIFUMI
Applicants: CHOH NOBUO, FURUYA SHUICHI, TAKEDA CHEMICAL INDUSTRIES LTD, WATANABE TOSHIFUMI, CHOH, NOBUO, FURUYA, SHUICHI, TAKEDA CHEMICAL INDUSTRIES, LTD., WATANABE, TOSHIFUMI
Application year: 1996
Main classification: C07D495
IPC codes: C07D495