Prostanoid compounds and pharmaceutical formulations

Prostanoids are described of the formulae ##STR1## (and the salts thereof) in which: X is cis or trans--CH.dbd.CH-- or CH.sub.2 CH.sub.2 --; PA1 R.sup.1 is C.sub.1-7 alkyl terminated by --COOR.sup.10 where R.sup.10 is H, C.sub.1-6 alkyl or aralkyl; PA1 Y is a saturtaed heterocyclic amino group; and PA1 R.sup.4 is thienylalkyl or furanylalkyl in which the ring may be substituted. These compounds inhibit blood platelet aggregation and have bronchodilatory action, and may be formulated for use as anti-asthmatics and antithrombotic agents.

Prostaglandins are a class of naturally occurring cyclopentane derivatives 
which are biologically active in many physiological systems and they and 
substances which antagonise their effects are therefore of considerable 
interest in both human and veterinary medicine. 
In view of the activity found in the natural prostaglandins, considerable 
effort has been directed towards the preparation of synthetic analogues. 
Many such compounds have been described, and in general it has been 
reported that these compounds possess activity within the same spectrum as 
the natural compounds. The synthetic compounds can however have increased 
selectivity of action, longer duration of activity or different potency, 
and in some cases they can antagonise the activity of natural 
prostaglandins. 
In most of the synthetic prostanoids previously reported, the side chains 
have been attached to the cyclopentane ring via carbon atoms, as in the 
natural prostaglandin structure. We have now found a new class of 
prostanoid compounds in which the .alpha.-side chain has the same or 
similar structure to that of the natural compounds, while the .beta.-side 
chain is attached to the ring via a nitrogen atom and the ring is also 
substituted by certain heteroaralkoxy groups. Compounds in this class have 
shown prostanoid activity in our tests and in particular they inhibit 
blood platelet aggregation and have bronchodilatatory action. 
The invention provides prostanoids of the general formula (1) 
##STR2## 
in which 
A represents 
##STR3## 
X is cis or trans --CH.dbd.CH-- or --(CH.sub.2).sub.2 --; 
R.sup.1 is straight or branched C.sub.1-7 alkyl bearing as a terminal 
substituent --COOR.sup.10 where R.sup.10 is a hydrogen atom, C.sub.1-6 
alkyl or C.sub.7-10 aralkyl (e.g. benzyl); 
Y represents (i) --NR.sup.2 R.sup.3 where R.sup.2 and R.sup.3 are the same 
or different and are each a hydrogen atom, aralkyl having a C.sub.1-7 
alkyl portion or C.sub.1-10 alkyl, both alkyls being optionally 
substituted by one or more substituents --OR.sup.7 (where R.sup.7 is a 
hydrogen atom, C.sub.1-7 alkyl, aryl or aralkyl having a C.sub.1-4 alkyl 
portion) or --NR.sup.8 R.sup.9 (where R.sup.8 and R.sup.9 are the same or 
different and are each a hydrogen atom or C.sub.1-4 alkyl, or where 
--NR.sup.8 R.sup.9 is a saturated heterocyclic amino group (as defined 
below for Y); any aryl group in R.sup.2 or R.sup.3 being optionally 
substituted by one or more C.sub.1-4 alkyl or trifluoromethyl groups; 
always provided that the total number of carbon atoms in the group 
--NR.sup.2 R.sup.3 does not exceed 15; 
or (ii) a saturated heterocyclic amino group which has 5-8 ring members and 
(a) optionally contains in the ring --O--, --S--, --SO.sub.2, --NR.sup.14 
-- (where R.sup.14 is a hydrogen atom, C.sub.1-7 alkyl or aralkyl having a 
C.sub.1-4 alkyl portion), &gt;C(OH)R.sup.6 (where R.sup.6 is a hydrogen atom, 
C.sub.1-7 alkyl, phenyl, or aralkyl having a C.sub.1-4 alkyl portion); 
and/or (b) is optionally substituted by one or more C.sub.1-4 alkyl 
groups; 
R.sup.4 is the group: 
##STR4## 
where alk is C.sub.1-3 alkylene; 
Z is O or S; 
R.sup.11 is a hydrogen atom; C.sub.1-6 alkyl; C.sub.1-6 alkoxy; aryl (e.g. 
phenyl) or phenylalkoxy or phenylalkyl having a C.sub.1-3 alkyl portion 
(the aryl portion in each case being optionally substituted by C.sub.1-3 
alkyl, C.sub.1-3 alkoxy or halogen); aryloxy (e.g. phenoxy); C.sub.5-7 
cycloalkyl; halogen or nitro; 
and the physiologically acceptable salts thereof. 
The formulae used herein are to be understood to depict either or both 
optical isomers of each of the compounds concerned as well as mixtures of 
the isomers, including racemates, even though the precise structure as set 
out only relates to one optical isomer. 
Compounds having the ring type (b) are particularly important. 
In the group --CH.sub.2 XR.sup.1, the alkyl portion of the group R.sup.1 
may for example contain 2-5 carbon atoms (straight or branched) and is 
preferably --(CH.sub.2).sub.3 COOR.sup.10. R.sup.10 is preferably a 
hydrogen atom or C.sub.1-4 alkyl, e.g. methyl, particularly hydrogen. 
When R.sup.1 is terminally substituted by --COOH,the compounds are capable 
of salt formation with bases, examples of suitable salts being alkali 
metal (e.g. sodium and potassium), alkaline earth metal (e.g. calcium), 
ammonium, substituted ammonium (e.g. tromethamine or 
dimethylaminoethanol), piperazine, morpholine, piperidine and tertiary 
amine (e.g. triethylamine) salts. 
X is preferably --CH.sub.2 CH.sub.2 -- or cis --CH.dbd.CH--, paticularly 
the latter. 
In the group Y, when one of R.sup.2 and R.sup.3 is alkyl or substituted 
alkyl, the alkyl group preferably contains no more than 7 (e.g. 2-7) 
carbon atoms and preferably has a straight chain. Examples of such groups 
are n-hexyl and n-heptyl. In such compounds, the other group of R.sup.2 or 
R.sup.3 is preferably hydrogen or methyl. When R.sup.2 or R.sup.3 is an 
aralkyl group, it may for example be benzyl, phenethyl or phenpentyl. 
In the optional substituent --OR.sup.7 on R.sup.2 or R.sup.3, examples of 
R.sup.7 are a hydrogen atom, methyl, n-butyl, phenyl, benzyl and 
phenethyl. The optional amino substituent --NR.sup.8 R.sup.9 may for 
example be --NH.sub.2, --NHMe, --NHEt, --NMe.sub.2 or --NEt.sub.2. These 
optional substituents may for example be carried at the .beta.-position, 
as in .beta.-hydroxyalkyl groups. Two --OR.sup.7 groups may be present, 
particularly on an R.sup.2 or R.sup.3 alkyl group; for example, there may 
be a hydroxy group at the .beta.-position and a second --OR.sup.7 group at 
the terminal position. 
Aryl (e.g. phenyl) groups in R.sup.2 and R.sup.3 may themselves be 
substituted, e.g. by C.sub.1-4 alkyl or trifluoromethyl. 
Compounds in which Y is a saturated heterocyclic amino group are however 
preferred. The types of heterocyclic group which are generally preferred 
are those in which the ring has 5-8 members and (a) optionally contains 
--O--, --S--, --SO.sub.2 -- or --NR.sup.14 -- and/or (b) is optionally 
substituted by one or more C.sub.1-4 alkyl (e.g. methyl) groups. The group 
may for example have a 5, 6 or 7-membered ring, e.g. pyrrolidino, 
piperidino, morpholino, piperazino, thiamorpholino, 1-dioxothiamorpholino, 
homomorpholino and hexamethyleneimino. 
Examples of the optional substituents which may be present on a second 
nitrogen atom in the ring are methyl, ethyl and benzyl. The carbon atoms 
of the heterocyclic rings may for example be substituted by methyl or 
ethyl. The group C(OH)R.sup.6 may for example be present in a piperidino 
ring and when R.sup.6 is other than hydrogen it may for example be methyl, 
ethyl or butyl. 
Compounds in which Y is a morpholino, dioxothiamorpholino or piperidino 
group are particularly preferred. 
The amino group in the group Y enables the compounds to form salts with 
inorganic or organic acids, e.g. hydrochlorides, sulphates, acetates, 
maleates and succinates. 
In R.sup.4, the alkylene group is preferably methylene and Z is preferably 
S. Where Z is S, the thienyl group is preferably substituted by C.sub.1-3 
alkyl (e.g. methyl), aryl (e.g. phenyl, optionally substituted by 
C.sub.1-3 alkoxy, e.g. methoxy), C.sub.5-7 cycloalkyl (e.g. cyclohexyl), 
halogen (e.g. bromine) or phenalkyl (e.g. phenethyl), and where Z is O the 
furanyl group is preferably substituted by an aryl, e.g. phenyl group. 
Particularly preferred groups of this type are phenylthienylalkyl and 
alkoxyphenylthienylalkyl. 
A particularly preferred group of compounds has the formula 1(b) where: 
X is cis --CH.dbd.CH--, 
R.sup.1 is --(CH.sub.2).sub.3 COOH, 
Y is morpholino, piperidino, or 1-dioxothiamorpholino, and 
R.sup.4 is methoxyphenylthienylmethyl. 
As indicated above, our tests have shown that compounds of formula (1) 
inhibit blood platelet aggregation and/or have bronchodilatatory activity. 
The test we have used for bronchodilatation is as described by K. M. 
Lulich, et al in British Journal of Pharmacology 58, 71-79, (1976) except 
quinea-pig lung is used instead of cat lung. The test for inhibition of 
platelet aggregation is as described by G. V. Born in Nature 194, 927-929 
(1962) except collagen is used instead of ADP as the pro-aggregatory 
agent. 
The compounds are thus of interest in the treatment of asthma and as 
antithrombotic agents for use in the treatment and prevention of 
cardiovascular diseases or conditions such as arteriosclerosis, 
atherosclerosis and myocardial infarcts. They may be formulated for use in 
conventional manner, with one or more pharmaceutical carriers. 
For oral administration, the pharmaceutical composition may take the form 
of, for example, tablets, capsules, powders, solutions, syrups, or 
suspensions prepared by conventional means with acceptable excipients. 
The compounds may be formulated for parenteral administration by bolus 
injections or continuous infusion. Formulations for injections may be 
presented in unit dosage form in ampoules, or in multi-dose containers, 
with an added preservative. The compositions may take such forms as 
suspensions, solutions, or emulsions in oily or aqueous vehicles, and may 
contain formulatory agents such as suspending, stabilising and/or 
dispersing agents. Alternatively, the active ingredient may be in powder 
form for reconstitution before use with a suitable vehicle, e.g. sterile 
pyrogen-free water. 
For administration by inhalation the compounds are conveniently delivered 
in the form of an aerosol spray presentation from pressurised packs or a 
nebuliser, or as a cartridge from which the powdered composition may be 
inhaled with the aid of a suitable device. In the case of a pressurised 
aerosol the dosage unit may be determined by providing a valve to deliver 
a metered amount. 
For use as antithrombotic agents, the compounds are preferably administered 
orally, for example in amounts of 0.1 to 10 mg/kg body weight, 1 to 4 
times daily. For use in the treatment of asthma, the compounds may also be 
administered orally in amounts of 0.1 to 10 mg/kg body weight, 1 to 4 
times daily; preferably however they are administered by inhalation in the 
form of aerosols or solutions for nebulisers, at doses varying from 0.3 to 
30 mg, 1 to 4 times daily. The compounds may be used in combination with 
other anti-asthmatic agents. It will be appreciated that the precise dose 
administered will always depend on the age and condition of the patient. 
The compounds of formula (1) may be prepared by selection and adaptation of 
methods known in prostanoid chemistry (see for example British Patent 
Specification 2028805A). Method (a) below is particularly important in 
forming certain prostanoids of the desired class, and other compounds in 
the class can be prepared from them by known techniques for example using 
one or more of methods (b) to (k) below. 
The following reactions will frequently require the use of (or will 
conveniently be applied to) starting materials having protected functional 
groups (e.g. hydroxy). It is to be understood that references to the use 
of starting materials of a particular structure are intended to include 
starting materials having protected functional groups. Certain of the 
reactions described below are capable of affecting other groups in the 
starting material which are desired in the end product, and this must be 
taken into account when performing multi-stage reactions. 
In the discussion below, the groups X and Y and the various R groups are as 
defined above except where otherwise indicated. 
(a) Compounds of formula (2) 
##STR5## 
(where R.sup.1a is as defined above for R.sup.1 where R.sup.10 is a 
hydrogen atom) may be prepared by reacting lactols of formula (3) or their 
aldehyde isomers of formula (3a) 
##STR6## 
with appropriate Wittig reagents, e.g. a phosphorane of formula 
R.sub.3.sup.12 P.dbd.CHR.sup.1a (where R.sup.12 is C.sub.1-6 alkyl or 
aryl, e.g. monocyclic aryl such as phenyl), or a salt thereof, e.g. the 
potassium salt. Suitable reaction solvents include hydrocarbons (e.g. 
benzene and toluene), ethers (e.g. tetrahydrofuran), dialkylsulphoxides 
(e.g. dimethylsulphoxide), alcohols and halogenated hydrocarbons. The 
reaction may be carried out at any suitable temperature up to 50.degree. 
C., preferably at room temperature. 
The reaction is particularly suitable for the preparation of compounds in 
which R.sup.1 is terminally substituted by --COOH (in salt form). Any 
hydroxy group in Y should preferably be in a protected state prior to this 
reaction. Suitable hydroxy protecting groups are described below. Any 
--NH.sub.2 group present should also be protected, e.g. by 
t-butoxycarbonyl. 
Except as regards the nature of R.sup.4, this reaction is the same as 
process (a) of British Patent Specification 2028805A. The intermediates of 
formulae (3) and (3a) may thus be prepared by the methods described in 
that specification, using starting materials containing the desired 
R.sup.4 group. 
These starting materials may themselves be prepared by the same general 
methods as described in Specification 2028805A. 
(b) Compounds of ring type (b) may be prepared by oxidising the 
corresponding hydroxy compound of ring type (a), for example with a 
Cr.sup.VI oxidising reagent, e.g. Jones reagent, at -10.degree. to room 
temperature, preferably -10.degree.-0.degree., in a solvent such as 
acetone. Other conventional methods can also be used, for example using 
dimethylsulphoxide and a suitable electrophilic reagent, such as acetyl 
bromide, oxalyl chloride, thionyl chloride, or dicyclohexylcarbodiimide in 
a hydrocarbon solvent such as toluene at low temperature e.g. -70.degree.. 
With the latter reagent, the reaction is preferably carried out in the 
presence of trifluoroacetic acid or its pyridinium salt. 
Other suitable reagents are N-chlorosuccinimidedimethylsulphide complex 
(used for example in a hydrocarbon solvent, such as toluene, e.g. at 
0.degree.-5.degree.), and pyridine-sulphur trioxide complex in 
dimethylsulphoxide (e.g. at 0.degree. to room temperature). 
When the .alpha.-side chain has a terminal --COOH group (i.e. when R.sup.10 
is hydrogen), better yields are sometimes obtained by prior protecting the 
carboxyl group, for example in the form of a trialkyl (e.g. trimethyl or 
triethyl) silyl ester. 
Any other hydroxy group present should be protected in this reaction. 
(c) Compounds in which R.sup.10 is alkyl or aralkyl can be prepared by 
esterification of the corresponding carboxylic acid (in which R.sup.10 is 
hydrogen). Conventional esterification techniques may be used, reaction 
with a diazoalkane being preferred. The alkyl esters may also be formed by 
reaction with an appropriate alcohol in the presence of a mineral acid, 
e.g. hydrochloric or sulphuric acid. 
(d) Compounds in which R.sup.1 is terminally substituted by a --COOH group 
can be prepared by saponifying a corresponding ester, e.g. using KOH or 
NaOH in methanol. 
(e) compounds in which X is trans --CH.dbd.CH-- may be prepared by 
isomerising the corresponding cis compound. The isomerisation may be 
effected by treatment with, for example, p-toluene sulphinic acid in 
dioxan (e.g. at reflux) or azobisisobutyronitrile and thiophenol, using 
for example a hydrocarbon solvent and any suitable temperature up to 
reflux. Where an oxo group is desired in the end product, it should be 
introduced after this reaction. 
(f) Compounds in which X is --(CH.sub.2).sub.2 -- may be prepared by 
catalytic hydrogenation of a corresponding compound in which X is 
--CH.dbd.CH--. Conventional catalysts may be used, preferably palladium or 
platinum on carbon, in a suitable solvent (e.g. an alcohol such as 
methanol) e.g. at room temperature. 
(g) Compounds of formula (1a) may be prepared by etherification of the 
corresponding hydroxy compound (in which R.sup.4 represents hydrogen), for 
example by reaction with an appropriate halide (R.sup.4 Hal), for example 
by reaction at room temperature in the presence of a suitable base (e.g. 
sodium hydride) in a suitable solvent (e.g. dimethylformamide). 
Any other hydroxy group present in the starting material (e.g. the ring 
hydroxy group) should be protected in this reaction. 
Starting materials for this reaction may be prepared by the same general 
technique as described above for process (a), using intermediates in which 
the group --OR.sup.4 is a protected hydroxy group and removing the 
protecting group prior to etherification. 
Starting materials of the formula (4) 
##STR7## 
(where R.sup.1a is as defined above and --OR.sup.h represents a protected 
hydroxy group) may also be prepared by method (b) of British Patent 
Specification 2028805A. 
(h) Compounds having ring type (a) can be prepared by removing the 
protecting group from the corresponding compound in which the ring hydroxy 
group is protected, for example by reduction or acid or alkaline 
hydrolysis. This is discussed below in connection with hydroxy group 
protection. 
(i) Compounds of formula (1a) in which Y is a substituted amino group may 
be prepared by substitution of the corresponding compound in which Y is 
--NH.sub.2. 
This reaction may be performed by treating the starting material with a 
compound of the formula JR.sup.13 J, where J is a readily displaceable 
group (such as halo, e.g. iodo, or hydrocarbylsulphonyloxy, e.g. 
p-toluenesulphonyloxy) and R.sup.13 is the appropriate divalent group 
(e.g. --(CH.sub.2).sub.2 O(CH.sub.2).sub.2 --). The reaction may be 
carried out in a solvent such as acetonitrile or methanol, in the presence 
of a suitable base, e.g. potassium carbonate or sodium bicarbonate. 
Alternatively, the starting material may be reacted with an appropriate 
dialdehyde or diketone in the presence of a reducing agent. For example, 
reaction with glutardialdehyde gives a compound in which Y is piperidino. 
The reducing agents which may be used are those generally known for the 
reduction of imines, e.g. formic acid, or an alkali metal borohydride or 
cyanoborohydride (e.g. sodium borohydride or potassium cyanoborohydride, 
using an alcohol such as ethanol as solvent, suitably at room temperature, 
preferably at pH 4-6), or hydrogen in the presence of a metal catalyst, 
e.g. palladium. 
The amines required as starting materials may be prepared by reduction of 
the corresponding azide, for example as described for process (j). 
(j) compounds of ring type (a) in which Y is --NH.sub.2 and R.sup.10 is 
hydrogen may be prepared by reducing the corresponding compound in which Y 
represents an azido group. 
Compounds in which X is --(CH.sub.2).sub.2 -- may thus be prepared by 
catalytic hydrogenation, using for example platinum or palladium on carbon 
as the catalyst. However, when compounds in which X is --CH.dbd.CH-- are 
required, selective reduction methods specific for the azide function 
should be used. Examples of suitable reagents are zinc and sodium 
dihydrogen phosphate in a suitable solvent (e.g. tetrahydrofuran); zinc 
and methanol/sulphuric acid; or triphenyl phosphine followed by 
methanol/sulphuric acid. 
The azido starting materials required for this reaction may be prepared by 
methods analogous to those for preparing the compounds of formula (2), 
using reagents in which Y is axido. These methods are analogous to those 
of process (c) of British Patent Specification No. 2028805A. 
(k) Salts of the compounds of formula (1) may be prepared by conventional 
methods, e.g. by treatment with an acid or (where R.sup.10 is hydrogen) a 
base in a suitable solvent e.g. water or an organic solvent such as ether. 
In the preparation of compounds of formula (1) the ring hydroxy group (or 
any other hydroxy group present) will often be protected and its 
liberation will frequently be the last step in the preparation. 
Conventional methods of protection may be used, protection in the form of 
t-butyldimethylsilyloxy or tetrahydropyranyloxy groups being preferred. 
These groups may be removed by acid hydrolysis. The group may also be 
protected in the form of an alkanoyloxy group having up to 7 carbon atoms, 
e.g. acetoxy. Such groups may be removed by alkaline hydrolysis.

The examples below illustrate the invention. The preparation of the 
intermediates required is described first. 
The preparation of the following intermediates is described in British 
Patent Specification 2028805 A: 
Intermediate 4: 
(.+-.)-3-endo-Hydroxy-2-exo-(4-morpholinyl)bicyclo[3.2.0]-heptan-6-one 
Intermediate 5: 
(3a.alpha.,4 
.alpha.,5.beta.,6a.alpha.)-(.+-.)-Hexahydro-5-hydroxy-4-(4-morpholinyl)-2H 
-cyclopenta(b)furan-2-one 
Intermediate 6: 
(3a.alpha.,4.alpha.,5.beta.,6a.alpha.)-(.+-.)-Hexahydro-4-(4-morpholinyl)-5 
-(tetrahydro-2H-pyran-2-yl)oxy-2H-cyclopenta(b)furan-2-one 
Intermediate 7: 
(3a.alpha.,4.alpha.,5.beta.,6a.alpha.)-(.+-.)-Hexahydro-4-(4-morpholinyl)-5 
-(tetrahydro-2H-pyran-2-yl)oxy-2H-cyclopenta(b)furan-2ol 
Intermediate 8: [1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
7-[5-Acetoxy-2-(4-morpholinyl)-3-[(tetrahydro-2H-pyran-2-yl)oxy]cyclopenty 
l]-5-heptenoate 
Intermediate 9: [1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-Methyl 
7-[5-Hydroxy-2-(4-morpholinyl)-3-[(tetrahydro-2H-pyran-2-yl)oxy]cyclopenty 
l]-5-heptenoate 
Temperatures are in .degree.C. The following abbreviations are used: 
TLC - thin layer chromatography, PE - petroleum ether (boiling at 
40-60.degree. unless otherwise stated), THF -tetrahydrofuran, EA - ethyl 
acetate, PTSA - p-toluene-sulphonic acid monohydrate, DMF - 
dimethylformamide, DMSO - dimethylsulphoxide, Dibal - diisobutyalaluminium 
hydride. 
Chromatography was carried out using silica gel. TLC was caried out using 
SiO.sub.2. The following abbreviations illustrate the eluent used for the 
chromatography and TLC: (A) 9:1 PE(b.p. 60-80.degree.) - EA; (B) 4:1 PE 
(b.p. 60-80.degree.) - EA; (C) 3:1 PE-ether; (D) ether-EA; (E) 9:1 EA-PE; 
(F) ether-PE; (G) 4:1 ether-PE; (H) 7:3 ether-PE; (I) 9:1 ether-methanol; 
(J) ether; (K) EA; (L) 19:1 ether-methanol; (M) 1:1 ether-PE (b.p. 
60-80.degree.); (N) 9:1 EA-PE (b.p. 60-80.degree.); (O) EA-PE (b.p. 
60-80.degree.); (P) 19:1 EA-methanol; (Q) 95:5 ether-methanol; (R) 85:15 
EA-methanol; (S) 3:1 EA-methanol; (T) 98:2 chloroform-methanol; (U) 95:5 
EA-methanol; (V) 4:1 ether-methanol; (W) PE; (X) 9:1 EA-methanol; (Y) 7:3 
EA-PE; (Z) 3:2 ether-PE; (AB) 1:1 EA-PE; (AC) 4:1 ether-isopentane; (AD) 
39:1 ether-methanol; (AE) 4:1 ether-PE (b.p. 60-80.degree.); (AF) 
ether-isopentane; (AG) chloroform; (AH) 97:3 chloroform-methanol; (AI) 7:3 
EA-PE (b.p. 60-80.degree.); (AJ) 85:15 ether-methanol; (AK) 97:3 
ether-methanol; AL 99:1 ether-methanol; (AM) ether-methanol. 
INTERMEDIATE 12 
(.+-.)-7-anti-(4-Morpholinyl)-5-endo-[tetrahydro-2H-pyran-2-yl)oxy]bicyclo 
[2.2.1]heptan-2-one 
Morpholine (76 ml) was added dropwise over 15 mins to a stirred solution of 
2-exo-bromo-3-endo-[(tetrahydro-2H-pyran-2-yl)oxy]bicyclo[3.2.0]heptan-6-o 
ne (100.8g) in acetone (500 ml) at 0.degree.. After 2h at 5.degree. the 
mixture was stirred at 20.degree. for 18h and then filtered. Evaporation 
of the filtrate gave an oil which was taken into ether (350 ml), filtered 
and washed (water, 2.times.100 ml). The ethereal solution was dried 
(MgSO.sub.4), filtered and evaporated to give the title compound as a 
solid. Purification from PE gave material (85.5 g) of m.p. 
86.degree.-88.degree.. 
INTERMEDIATE 14 
4-(1,3-Dioxolan-2-yl)-2-phenylthiophene 
A solution of 5-bromo-3-thiophenecarboxaldehyde (32.5g) in benzene (500 ml) 
was treated with PTSA (0.323g) and ethylene glycol (21.1g), and the 
mixture heated under reflux in a Dean and Stark apparatus until the 
theoretical volume of water had been removed. After cooling the mixture 
was washed with water, (2x) then brine, dried (MgSO.sub.4), filtered and 
concentrated, and the residue distilled (b.p. 96.degree.-100.degree. at 
0.4 mm) to give the title compound as an oil (24 g). 
Analysis Found: C, 35.8; H, 3.0; C.sub.7 H.sub.7 BrO.sub.2 S requires: C, 
35.7; H, 3.0%. 
INTERMEDIATE 15 
(a) 5-Phenyl-3-thiophenecarboxaldehyde 
A solution of phenylmagnesium chloride in THF (82.94 ml, 2.39 M) was added 
to a stirred solution of ZnBr.sub.2 (44.6g) in dry THF (350 ml) under 
nitrogen. The mixture was stirred at room temperature for 15 min. 
Dibal (9.91 ml, 1 M) in hexane solution was added dropwise to a stirred 
mixture of triphenylphosphine (10.39 g) and nickel acetoacetonate (2.55 g) 
in dry THF (160 ml) under nitrogen. A solution of Intermediate 14 (23.3 g) 
in dry THF (150 ml) was added after 10 min. The solution containing the 
organozinc reagent was then added dropwise and the mixture was stirred for 
1h. 
2N Hydrochloric acid (400 ml) was added at 0.degree. and the mixture was 
stirred at room temperature for 0.5h. The two layers were separated and 
the aqueous layer was extracted with ether (2.times.400 ml), washed with 
NaHCO.sub.3 solution and brine and then dried (MgSO.sub.4). Solvent 
removal in vacuo gave a solid (32.8g) which was chromatographed (A) to 
give the title compound (13.35 g), m.p. 64.degree.-65.degree. (from PE 
(b.p. 60.degree.-80.degree.)). 
The following compounds were prepared by a similar procedure: 
(b) 4-(4-Methoxyphenyl)-2-thiophenecarboxaldehyde, m.p. 
75.degree.-76.5.degree. (from PE (b.p. 60.degree.-80.degree.)-EA, 2:1), 
from 4-bromo-2-(1,3-dioxolan-2-yl)thiophene and p-methoxyphenyl zinc 
bromide [from 4-bromoanisole, zinc bromide] 
(c) 4-(Phenylmethyl)-2-thiophene carboxaldehyde, from 
4-bromo-2-(1,3-dioxolan-2-yl)thiophene and a solution of activated zinc 
dust and benzyl bromide in dry THF. Purification by chromatography (B) 
Analysis Found: C, 71.3; H, 5.0; C.sub.12 H.sub.10 OS requires: C, 71.3; H, 
5.0%. 
INTERMEDIATE 16 
4-(4-Methoxyphenyl)-2-thiophenemethanol 
Intermediate 15(b) (9.85 g) in THF (40ml) and absolute ethanol (160 ml) was 
stirred with NaBH.sub.4 (1.9 g) at room temperature for 1h. Saturated 
aqueous KH.sub.2 PO.sub.4 (60 ml) was added and the mixture evaporated in 
vacuo. Extraction of the residue with CH.sub.2 Cl.sub.2 (3.times.50 ml), 
drying (MgSO.sub.4) and evaporation gave a solid. Crystallisation from EA 
gave the title compound (7.49 g), m.p. 136.5.degree.-138.degree.. 
INTERMEDIATE 17 (a) 5-Phenyl-3-thiophenemethanol 
A stirred solution of Intermediate 15 (12g) in methanol (120 ml) was 
treated with NaBH.sub.4 (1.82 g) at room temperature for 15 min. The 
mixture was cooled to 0.degree. and treated with NH.sub.4 Cl solution (200 
ml), followed by water (200 ml) and ether (400 ml). The ether extract was 
separated and the aqueous phase further extracted with ether (400 ml), 
washed with brine, dried (MgSO.sub.4), filtered and evaporated to afford 
the title compound as a solid (11.5 g), m.p. 92.degree.-93.degree.. 
(b) 4-(Phenylmethyl)-2-thiophene methanol, m.p. 33.degree.-34.degree. was 
prepared by a similar procedure from Intermediate 15(c). 
INTERMEDIATE 18 
2-(1-Cyclohexenyl)thiophene 
n-Butyllithium (40.7 ml, 1.5 M) was added dropwise to a stirred solution of 
thiophene (5 g) in dry ether (50 ml) and the mixture heated under reflux 
for 30 min. After cooling to -78.degree., cyclohexanone (6.21 ml) in dry 
ether (30 ml) was added dropwise and the temperature allowed to rise to 
ambient. After 1h 2N hydrochloric acid (80 ml) was added and stirring 
continued for 16h. The organic layer was separated and the aqueous layer 
extracted with ether (2.times.40 ml). The combined extracts were washed 
with water, dried (MgSO.sub.4), filtered and evaporated to give an oil, 
which was dissolved in benzene (50 ml) and heated under reflux in the 
presence of PTSA for 0.75h. the cooled solution was washed twice with 8% 
NaHCO.sub.3 solution and the aqueous solution extracted with ether 
(2.times.40 ml), dried (MgSO.sub.4) filteed and evaporated to give the 
title compound as an oil (9.83 g). TLC(F) R.sub.f 0.73 
IMTERMEDIATE19 
2-Cyclohexylthiophene 
A solution of Intermediate 18 (9.8 g) in absolute alcohol (75 ml) was 
hydrogenated over prereduced 10% palladium oxide on charcoal (2 g). The 
mixture was filtered (`Hyflo`) and the filtrate evaporated. Distillation 
of the residue gave the title compound (6.6 g) of b.p. 
70.degree.-80.degree./0.2 mm. 
INTERMEDIATE .degree. 
5-Cyclohexyl-2-thiophenemethanol 
n-Butyllithium (25.3 ml, 1.5 M) was added dropwise to a stirred solution of 
Intermediate 19 (6 g) in dry THF (75 ml). After 15 min the solution was 
cooled to 0.degree. and paraformaldehyde (3.25 g) was added. After a 
further 20 min at room temperature saturated NH.sub.4 Cl solution (30 ml) 
was added, the organic layer separated and the aqueous solution extracted 
with ether (2.times.50 ml), dried (MgSO.sub.4), filtered and evaporated, 
and the residue chromatographed (C). The title compound was obtained as a 
solid (5.36 g), m.p. 31.degree.-31.5.degree.. 
INTERMEDIATE 21 
(a) 4-Phenyl-2-thiophenemethanol 
A stirred suspension of 4phenyl-2-thiophenecarboxaldehyde (4.32 g) in 
absolute ethanol (85 ml) was cooled in an ice-bath and treated with 
NaBH.sub.4 (1.06g). After 20 min. the mixture was allowed to attain 
ambient temperature when stirring was continued for 6h. Saturated aqueous 
NH.sub.4 Cl (30 ml) was then carefully added to the vigorously stirred 
mixture, and the resulting suspension extracted with ether (2.times.200 
ml). The combined extracts were dried (Na.sub.2 SO.sub.4 /K.sub.2 
CO.sub.3), filtered and evaporated to give the title compound (4.2 g) as 
crystals, m.p. 112.degree.-113.degree.. 
(b) 4-Bromo-2-thiophene methanol was similarly prepared from 
4-bromo-2-thiophene carboxaldehyde. 
Analysis Found: C, 31.1; H, 2.6; C.sub.5 H.sub.5 BrOS requires: C, 30.8; H, 
2.6%. 
INTERMEDIATE 22 
4-Methyl-2-thiophenemethanol 
A solution of 4-methyl-2-thiophene carboxylic acid (6 g) in dry ether (50 
ml) was added to a stirred suspensin of LiAlH.sub.4 (2 g) in dry ether 
(100 ml) and the mixture kept at room temperature for 2h and 30.degree. 
for 1h. Wet THF (50 ml) was cautiously added followed by 1N hydrochloric 
acid (150 ml). The layers were separated and the aqueous solution 
extracted with ether (100 ml), washed with Na.sub.2 CO.sub.3 solution 
(2x), water (2x), brine and then dried (MgSO.sub.4). Evaporation gave a 
liquid which was distilled (b.p. 90.degree./1 mm) to give the title 
compound (4.25 g). 
INTERMEDIATE 23 
(a) 2-(Bromomethyl)-4-phenylthiophene 
A cooled, stirred suspension of Intermediate 21a) (3.86 g) in dry CH.sub.2 
Cl.sub.2 (60 ml) was treated dropwise with a solution of PBr.sub.3 (1.27 
ml) in dry CH.sub.2 Cl.sub.2 (20 ml), and stirring continued for 30 min. 
The mixture was treated with 8% aqueous NaHCO.sub.3 (100 ml), stirred for 
20 min., extracted with ether (1.times.150 ml, 1.times.50 ml), and the 
extracts dried (MgSO.sub.4), filtered and evaporated to give the title 
compound (5.01 g) as a solid, m.p. 87.degree.-88.5.degree.. 
The following compounds were prepared by a similar procedure: 
(b) 2-Bromomethyl-4-(phenylmethyl)thiophene, from Intermediate 17b); TLC 
(M) R.sub.f 0.58. 
(c) 2-Bromomethyl-5-cyclophexylthiophene, from Intermediate 20; TLC (M) 
R.sub.f 0.72. 
(d) 4-Bromo-2-(bromomethyl)thiophene, from Intermediate 21b), 
Analysis Found: C, 23.5; H, 1.6. C.sub.5 H.sub.4 Br.sub.2 S requires: C, 
23.5; H, 1.6%. 
(e) 2-(Bromomethyl)-4-(4-methoxyphenyl)thiophene, from Intermediate 16; 
Analysis Found: C, 50.6; H, 4.1. C.sub.12 H.sub.11 BrOS requires: C, 50.9; 
H, 3.9%. 
(f) 4-(Bromomethyl)-2-phenylthiophene, from Intermediate 17; TLC (J) Rf 
0.58. 
(g) 2-Bromomethyl-4-methylthiophene, from Intermediate 22; TLC (O) Rf 0.55. 
INTERMEDIATE 24 
2-(Bromomethyl)-5-phenylthiophene 
To a boiling solution of 2-methyl-5-phenylthiophene (2g) in dry CCl.sub.4 
(100 ml) was rapidly added N-bromosuccinimide (1.94 g) and 
dibenzoylperoxide (0.15 g). After heating under reflux for 30 min., the 
mixture was cooled and filtered. Evaporation in vacuo gave the title 
compound as an oil (1.5 g). 
Analysis Found: C, 52.0; H, 3.4; C.sub.11 H.sub.9 BrS requires; C, 52.2; H, 
3.6% 
Intermediate 25 
(.+-.)-5-endo-Hydroxy-7-anti-(4-morpholinyl)bicyclo[2.2.1] heptan-2-one, 
hydrochloride 
To a stirred solution of Intermediate 12 (96.4 g) in methanol (600 ml) was 
added an ethereal solution of HCl (240 ml) and the mixture stirred at 
20.degree. for 2.5 h (pH 1.5-2). Filtration followed by evaporation of the 
filtrate gave an oil which solidified on trituration with EA (2.times.200 
ml). Coloured impurities were removed by extraction with boiling 
isopropanol to leave the title compound as a solid (70.6 g), m.p. 
181.degree.-182.degree.. 
Intermediate 26 
(a) 
(.+-.)-5-endo-(4-Bromophenylmethoxy)-7-anti-(4-morpholinyl)bicyclo[2.2.1]h 
eptan-2-one 
Aqueous NaOH solution (1ON; 200 ml) was added 
Intermediate 26 
(c) 
7-anti-(4-Morpholinyl)-5-endo-[(5-phenylthien-2-yl)methoxyl]bicyclo[2.2.1] 
heptan-2-one 
A mixture of 10N NaOH (10 ml), benzyltriethylammonium chloride (0.145 g), 
Intermediates 25 (0.68 g) and 24 (1.5 g) in Ch.sub.2 Cl.sub.2 (10 ml) was 
stirred at room temperature for 2 days. Water (10 ml) was added and the 
aqueous layer extracted with CH.sub.2 Cl.sub.2 (3.times.25 ml), dried 
(MgSO.sub.4), filtered and evaporated and the residue purified by 
chromatography (F) to give the title compound as a solid (0.9 g), m.p. 
129.degree.-130.degree.. 
The following compound was similarly prepared: 
(d) 
5-endo-[(5-Cyclohexylthien-2-yl)methoxyl]-7-anti-(4-morpholinyl)bicyclo[2. 
2.1]heptan-2-one, m.p. 56.degree.-57.degree., from Intermediates 25 and 
23(c). Purification by chromatography (G) 
INTERMEDIATE 27 
(b) 
8-anti-(4-Morpholinyl)-6-endo[(5-phenylthien-2-yl)methoxy]-2-oxabicyclo[3. 
2.1]octan-3-one 
Peracetic acid (6.1M, 1.93 ml) was added dropwise to a mixture of 
Intermediate 26(c) (0.9 g) and CH.sub.3 COONa.3H.sub.2 O (0.96 g) in 
acetic acid (8 ml) and water (4 ml) at 5.degree.-10.degree.. The resulting 
mixture was stirred at 20.degree. for 48 h when excess fo peracid was 
destroyed with 10% Na.sub.2 SO.sub.3 solution (20 ml). After 1.5 h the 
solvents were removed in vacuo, the residue taken up into water (20 ml), 
treated with Na.sub.2 CO.sub.3 solution until pH 9 and extracted with EA 
(3.times.20 ml). The combined extracts were dried (MgSO.sub.4), filtered 
and concentrated, and the residue purified by chromatography (H) through 
to (I). The title compound was obtained as a solid (0.28 g), m.p. 
135.degree.-137.degree.. 
The following compound was similarly prepared: (c) 
6-endo-[(5-Cyclohexylthien-2-yl)methoxy]-8-anti(4-morpholinyl)-2-oxabicycl 
o[3.2.1]octan-3-one, from Intermediate 26(d). TLC (SiO.sub.2) Ether R.sub.f 
0.38. Purification by chromatography (J) 
INTERMEDIATE 34 
(a) 
(1.alpha.,2.beta.,3.alpha.,5.alpha.)-(.+-.)-3-Hydroxy-2-(4-morpholinyl)-5- 
[(5-phenylthien-2-yl)methoxy]cyclopentane acetaldehyde 
A stirred solution of Intermediate 28(b) (0.5 g) in dry CH.sub.2 Cl.sub.2 
(20 ml) at -70.degree. under nitrogen was treated dropwise with Dibal (1M 
in hexane, 2.5 ml). After 1 h at -70.degree., methanol (20 ml) was added 
and the temperature of the mixture allowed to rise to ambient over 3 h. 
The mixture was filtered through `Hyflo`, concentrated and the residue 
taken up into CH.sub.2 Cl.sub.2 (100 ml). After drying (MgSO.sub.4), 
filtration and concentration gave the title compound as a foam (0.4 g). IR 
(CHBr.sub.3) 1715 cm.sup.-1. 
(b) 
[1.alpha.,2.beta.,3.alpha.,5.alpha.]-(.+-.)-5-[(5-Cyclohexylthien-2-yl-met 
hoxy]-3-hydroxy-2-(4-morpholinyl)cyclopentane acetaldehyde, was prepared by 
a similar procedure from Intermediate 28(c), IR (CHBr.sub.3) 3580-3530 
(broad), 1710 cm.sup.-1. 
INTERMEDIATE 36 
(a) [1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
7-[2-(4-Morpholinyl)-5-[[4-phenylmethyl)thien-2-yl]methoxy]-3-[(tetrahydro 
-2H-pyran-2-yl)oxy]cyclopentyl]-5-heptenoate. 
Sodium hydride (1.34 g, 50% in oil) was added to a stirred solution of 
Intermediates 9 (3.83 g) and 23(b) (7.75 g) in dry DMF (20 ml) at 
0.degree. under nitrogen. The mixture was stirred at 0.degree. for 15 min 
and then at room temperature for 1 h, whereupon NH.sub.4 Cl solution (100 
ml) was added and the pH adjusted to 6.5 with KH.sub.2 PO.sub.4 solution. 
The mixture was extracted with ether (3.times.100 ml), washed with water 
(2.times.) and brine and then dried (MgSO.sub.4). Evaporation in vacuo 
gave a residue which was purified by chromatography (M) to give the title 
compound as an oil (2.1 g). 
Analysis Found: C, 67.9; H, 8.1; N, 2.2. C.sub.34 H.sub.47 NO.sub.6 S 
requires: C, 68.3; H, 7.9; N, 2.4%. 
The following compounds were prepared by a similar procedure: 
(b) [1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
7-[5-[(4-Bromothien-2-yl)methoxy]-2-(4-morpholinyl)-3-[(tetrahydro-2H-pyra 
n-2-yl)oxy]cyclopentyl]-5-heptenoate from Intermediates 9 and 23(a). 
Purification by chromatography (N) 
Analysis Found: C, 55.5; H, 6.7; N, 2.1. C.sub.27 H.sub.40 BrNO.sub.6 S 
requires: C, 55.3; H, 6.9; N, 2.4%. 
(c) [1.alpha.(Z),2.beta.,3.alpha., 5.alpha.]-(.+-.)-Methyl 
7-[5-[[4-(4-Methoxyphenyl)thien-2-yl]methoxy]-2-(4-morpholinyl)-3-[(tetrah 
ydro-2H-pyran-2-yl)oxy]cyclopentyl]-5-heptenoate from Intermediates 9 and 
23(e). Purification by chromatography (O). 
Analysis Found: C, 66.6; H, 7.8; N, 2.4. C.sub.34 H.sub.47 NO.sub.7 S 
requires: C, 66.5; H, 7.71; N, 2.3%. 
EXAMPLE 1 
(a) 1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
7-[3-Hydroxy-2-(4-morpholinyl)-5-(2-thienyl methoxy) 
cyclopentyl]-5-heptenoate 
NaH (80% dispersion in oil, 0.72 g) was added to a stirred mixture of 
Intermediate 9 (2.88 g) and 2-bromomethyl thiophene (3.71 g) in dry DMF 
(15 ml) at room temperature. After 1.5 h the suspension was poured into 
saturated NH.sub.4 Cl solution (100 ml) and extracted with ether. The 
combined extracts were dried (MgSO.sub.4), filtered and concentrated, and 
the residual oil was stirred for 0.25 h at room temperature with 10% 
concentrated H.sub.2 SO.sub.4 in methanol (25 ml). The solution was 
neutralised with 8% NaHCO.sub.3 solution and then extracted with CH.sub.2 
Cl.sub.2. The combined extracts were dried (MgSO.sub.4), filtered and 
concentrated. The residue was purified by short path column chromatography 
(T). The title compound was obtained as an oil (1.2 g) IR (Neat) 3410, 
1730 cm.sup.-1. TLC 95:5 chloroform-methanol Rf 0.4. 
The following compounds were prepared by a similar procedure. 
(b) [1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
7-[3-Hydroxy-2-(4-morpholinyl)-5-[(2-phenylthien-4-yl)methoxy]cyclopentyl] 
-5-heptenoate from Intermediates 9 and 23(f). IR (CHBr.sub.3) 3590, 1628 
cm.sup.-1. Purification by chromatography (I). 
(c) [1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
7-[3-Hydroxy-2-(4-morpholinyl)-5-(3-thienylmethoxy)cyclopentyl]-5-heptenoa 
te, from Intermediate 9 and 3-bromomethylthiophene. Purification by 
chromatography using 1-4% methanol in ether as eluent. IR (CHBr.sub.3) 
3500, 1735 cm.sup.-1. TLC (Q) R.sub.f 0.34. 
(d) [1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
7-[3-Hydroxy-5-[(4-methylthien-2-yl)methoxy]-2-(4-morpholinyl)cyclopentyl] 
-5-heptenoate, from Intermediates 9 and 23(g). Purification by 
chromatography (L). IR (CHBr.sub.3) 3580 (Broad), 1728 cm.sup.-1. 
(e) 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[3-Hydroxy-2-(4-morpholin 
yl)-5-[(5-phenylfuran-2-yl)methoxy]cyclopentyl]-5-heptenoic acid, from 
Intermediate 9 and 2-(bromomethyl)-5-phenylfuran, IR(CHBr.sub.3) 3500, 
1720, 1700, 1018, 788 cm.sup.-1. TLC (SiO.sub.2) (I) R.sub.f 0.18. 
Purification by chromatography (I). 
(f) [1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
7-[3-Hydroxy-2-(4-morpholinyl)-5-[(4-phenylthien-2-yl)methoxy)cyclopentyl] 
-5-heptenoate, from Intermediates 9 and 23(a), m.p. 78.degree.-80.degree.. 
Purification by chromatography (K) followed by (U). 
EXAMPLE 2 
(a) 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[3-Hydroxy-2-(4-morpholin 
yl)-5-[(5-phenylthien-2-yl)methoxy]cyclopentyl]-5-heptenoic acid 
A mixture of (4-carboxybutyl)triphenylphosphonium bromide (3.36 g) and 
potassium t-butoxide (1.7 g) in dry THF (40 ml) was stirred at 20.degree. 
for 15 min. under nitrogen. A solution of Intermediate 34(a) (0.75 g) in 
dry THF (20 ml) was added dropwise and stirring continued for a further 45 
min. Water (3 ml) was added and the solvent removed in vacuo. The residue 
remaining was taken up into water (25 ml) and the solution adjusted to pH 
12-13 with 2N NaOH. The aqueous solution was extracted with ether 
(3.times.15 ml) and then acidified to pH 6.5 with 2N hydrochloric acid. 
The acid solution was extracted with ether (6.times.25 ml) and the 
combined extracts dried (MgSO.sub.4), filtered and evaporated to give the 
title compound as a foam (0.6 g). IR (CHBr.sub.3) 3500, 1740, 1705 
cm.sup.-1. TLC 92.5:7.5 CH.sub.2 Cl.sub.2 -methanol Rf 0.16. 
The following compound was prepared by a similar procedure: 
(b) 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[5-[(5-Cyclohexylthien-2- 
yl)methoxy]-3-hydroxy-2-(4-morpholinyl)cyclopentyl]-5-heptenoic acid, from 
Intermediate 34(b), IR (Neat 1720 cm.sup.-1 (broad), TLC (Q) R.sub.f 0.33. 
EXAMPLE 3 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[5-[(5-Cyclohexylthien-2-yl) 
methoxy]-2-(4-morpholinyl)-3-oxocyclopentyl]-5-heptenoic acid, was 
prepared by the oxidation method of Example 7 from the product of Example 
2(b). IR (Neat) 1740, 1710 cm.sup.-1, TLC (G) R.sub.f 0.27. Purification 
by chromatography (Z). 
EXAMPLE 4 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[2-(4-Morpholinyl)-3-oxo-5-(2-thien 
ylmethoxy)cyclopentyl]-5-heptenoic acid 
A mixture of the product of Example 1(a) (1.2 g) and KOH (3.3 g) in 
methanol (15 ml) and water (7.5 ml) was stirred for 5 h. at room 
temperature. The methanol was removed in vacuo and the aqueous residue was 
diluted with water (20 ml) and acidified to pH 6.5 with NaHSO.sub.4. 
Extraction with CH.sub.2 Cl.sub.2 gave, after drying over MgSO.sub.4 and 
concentrating, the crude acid as an oil (0.5 g). To a solution of this 
acid (0.5 g) in triethylamine (1 g), dry DMSO (3 ml) and CH.sub.2 Cl.sub.2 
(5 ml) cooled to -10.degree. was added pyridine-SO.sub.3 complex (0.58 g). 
The solution was stirred for 2 h. during which the temperature was allowed 
to rise to 15.degree.. Water (10 ml) was added and the CH.sub.2 Cl.sub.2 
then removed in vacuo. The mixture was then brought to pH 6 with citric 
acid followed by extraction with EA. The combined extracts were dried 
(MgSO.sub.4), filtered and concentrated to give an oil (0.4 g) which was 
purified by short path column chromatography (AB) to give the title 
compound as an oil (0.24 g). IR (CHBr.sub.3) 3490, 1733, 1700 cm.sup.-1. 
TLC (T) Rf 0.2. 
EXAMPLE 5 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-Methyl 
(7-[3-Hydroxy-2-(4-morpholinyl)-5-[[4-(phenylmethyl)thien-2-yl]methoxy]cyc 
lopentyl]-5-heptenoate 
A solution of Intermediate 36(a) (2 g) in 9:1 methanol-sulphuric acid (15 
ml) was stirred for 2 h at room temperture, whereupon NaHCO.sub.3 solution 
(100 ml) was added. The mixture was extracted with EA (3.times.70 ml), the 
extracts washed with brine, dried (MgSO.sub.4) and concentrated. The 
residue was chromatographed (I) to give the title compound as an oil (1.44 
g). IR (CHBr.sub.3) 3500-3400 (broad), 1728 cm.sup.-1. 
Analysis Found: C, 67.4; H, 7.5; N, 2.7. C.sub.29 H.sub.39 NO.sub.5 S 
requires: C, 67.8; H, 7.7; N, 2.7%. 
EXAMPLE 6 
(a) 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[3-Hydroxy-2-(4-morpholin 
yl)-5-[[4-(phenylthien-2-yl)methoxy]cyclopentyl]-5-heptenoic acid 
A mixture of the product of Example 1(f) (0.915 g) and 2N NaOH (5 ml) in 
methanol (10 ml) was stirred at room temperature for 16 h. The methanol 
was removed in vacuo and the residue washed with ether (50 ml), acidified 
with HCl/phosphate buffer to pH 6.5 and extracted with EA (3.times.50 ml). 
The combined extracts were dried (MgSO.sub.4) and concentrated to give the 
title compound as a gum which crystallised (0.88 g) in trituration with 
ether-EA. m.p. 119.5.degree.-121.5.degree.. 
The following compounds were prepared by a similar procedure. 
(b) 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[3-Hydroxy-2-(4-morpholin 
yl)-5-[[4-(phenylmethyl)thien-2-yl]methoxy]cyclopentyl]-5-heptenoic acid, 
from the product of Example 8. Purification by chromatography (L), IR 
(Neat) 3370, 1705 cm.sup.-1, TLC (I) R.sub.f 0.29. 
(c) 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[3-Hydroxy-5-[(4-methylth 
ien-2-yl)methoxy]-2-(4-morpholinyl)cyclopentyl]-5-heptenoic acid, from the 
product of Example 1(m), IR (CHBr.sub.3) 3600-3500 broad, 1730, 1705 
cm.sup.-1, TLC (I) R.sub.f 0.23. 
EXAMPLE 7 
(a) 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[5-[(4-Bromothien-2-yl)me 
thoxy]-3-hydroxy-2-(4-morpholinyl)cyclopentyl]-5-heptenoic acid. 
A stirred solution of Intermediate 36(b) (1.29 g) in methanol (100 ml) was 
treated wtih concentrated sulphuric acid (3.5 ml) and the mixture stirred 
at room temperature for 1 h. After quenching by carefully pouring into 8% 
NaHCO.sub.3 solution (250 ml) the methanol was removed and the residue 
extracted with EA (3.times.50 ml). The combined extracts were evaporated 
and the residue was dissolved in a mixture of 2N NaOH (5 ml) and methanol 
(10 ml) with stirring at room temperature. After 18 h the mixture was 
evaporated in vacuo and the residue acidified to pH 6.5 with 1M aqueous 
KH.sub.2 PO.sub.4. Extraction with EA (3.times.50 ml), drying (MgSO.sub.4) 
and evaporation gave the title compound as a glass (0.98 g). IR 
(CHBr.sub.3) 3580, 3560, 3500, 1725, 1700 cm.sup.-1 TLC (X) R.sub.f 0.22. 
(b) 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[3-Hydroxy-5-[[4-(4-metho 
xyphenyl)thien-2-yl]methoxy]-2-(4-morpholinyl)cyclopentyl]-5-heptenoic 
acid, was similarly prepared from Intermediate 36(c), m.p. 
95.degree.-100.degree.. 
Analysis Found: C, 65.6; H, 7.4; N, 2.7. C.sub.28 H.sub.37 NO.sub.6 S 
requires: C, 65.2; H, 7.2; N, 2.7%. 
EXAMPLE 8 
[1.alpha.(Z),2.beta.,3.alpha.,5.alpha.]-(.+-.)-7-[3-Hydroxy-2-(4-morpholiny 
l)-5-(3-thienylmethoxy)cyclopentyl]-5-heptenoic acid 
A solution of the product of Example 1(c) (2.7 g) in methanol (15 ml) and 
water (7 ml) containing KOH (0.3 g) was stirred at room temperature for 2 
hours. The methanol was removed in vacuo, and the aqueous solution 
acidifed to pH 6.5 with NaHSO.sub.4 and extracted with CH.sub.2 Cl.sub.2. 
The combined extracts were dried (MgSO.sub.4), filtered and concentrated, 
and the residue chromatographed (Q) to give the title compound as an oil 
(0.65 g). IR (CHBr.sub.3) 3500 (br), 1730, 1700 cm.sup.-1. TLC 
(SiO).sub.2) (Q) R.sub.f 0.13. Purification by chromatography (Q). 
EXAMPLE 9 
(a) 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[2-(4-Morpholinyl)-3-oxo-5-[4-phen 
ylthien-2-yl)methoxy]cyclopentyl]-5-heptenoic acid 
Trimethylsilyl chloride (0.24 ml) was added to a solution of the product of 
Example 6(a) (0.83 g) and triethylamine (0.26 ml) in dry toluene (10 ml) 
at 0.degree.. 
A solution of oxalyl chloride (0.54 ml) in dry toluene (5 ml) was stirred 
under nitrogen at -60.degree. and treated slowly dropwise with a solution 
of DMSO (0.44 ml) in dry toluene (5 ml). After stirring for 10 min the 
mixture was treated dropwise with the above prepared solution of 
alcohol-silyl ester maintaining the internal temperture between 
-50.degree. to -45.degree.. After a further 15 min triethylamine (2.52 ml) 
was added and the temperature of the mixture allowed to rise to 0.degree.. 
Aqueous KH.sub.2 PO.sub.4 (200 ml) and EA (100 ml) were added and after 
shaking the aqueous layer separated. After further extraction with EA 
(2.times.50 ml), washing with phosphate buffer (2.times.20 ml), drying 
(MgSO.sub.4) and concentration there was obtained a foam. Purification by 
flash chromatography (J) gave the title compound as a solid (0.44 g), m.p. 
114.degree.-116.degree.. 
The following compounds were prepared using a similar procedure: 
(b) 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[2-(4-Morpholinyl)-3-oxo-5-(3-thie 
nylmethoxy)cyclopentyl]-5-heptenoic acid, from the product of Example 8. 
Purification by chromatography (H). IR (CHBr.sub.3) 3500, 3200-2300 
(broad), 1735, 1700 cm.sup.-1. TLC (Q) R.sub.f 0.2. 
(c) 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[2-(4-Morpholinyl)-3-oxo-5-[[4-(ph 
enylmethyl)thien-2-yl]methoxy]cyclopentyl]-5-heptenoic acid, from the 
product of Example 6(b). Purification by chromatography (AE). IR 
(CHBr.sub.3) 1738, 1700 cm.sup.-1 TLC. (J) R.sub.f 0.3. 
(d) [1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[5-[(4-Bromothien-2-yl) 
methoxy]-2-(4-morpholinyl)-3-oxocyclopentyl]-5-heptenoic acid, from the 
product of Example 7(a). Purification by chromatography (AF). IR 
(CHBr.sub.3) 1738, 1700 cm.sup.-1 TLC (J) R.sub.f 0.19. 
(e) 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[5-[[4-(4-Methoxyphenyl)thien-2-yl 
]methoxy]-2-(4-morpholyinl)-3-oxocyclopentyl]-5-heptenoic acid, from the 
product of Example 7(b). Purification by chromatography (AF). m.p. 
107.5.degree.-109.degree.. 
Analysis Found: C, 65.6; H, 6.9;N, 2.6. C.sub.28 H.sub.35 NO.sub.6 
requires: C, 65.5; H, 6.9; N, 2.7%. 
(f) 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[5-[(4-Methylthien-2-yl)-methoxy]- 
2-(4-morpholinyl)-3-oxocyclopentyl]-5-heptenoic acid, from the product of 
Example (6c). Purification by chromatography (J). IR (CHBr.sub.3) 3500, 
1735, 1700 cm.sup.1 TLC (L) R.sub.f 0.4. 
EXAMPLE 10 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-(2-(4-Morpholinyl)-3-oxo-5-[(5-phen 
ylfuran-2-yl)methoxy]cyclopentyl]-5-heptenoic acid 
Trimethylsilyl chloride (0.073 ml) was added to a solution of the product 
of Example (1e) (0.25g) and triethylamine (0.082 ml) in dry toluene (5 ml) 
at 0.degree.. After stirring for 5 min. the mixture was then added to a 
mixture of N-chloro-succinimide (0.178g) and dimethylsulphide (0.107) in 
dry toluene (10 ml) and stirring continued for 45 min. Triethylamine (0.28 
ml) was added followed after 5 min. by water (10 ml) and KH.sub.2 PO.sub.4 
solution until pH 6. The mixture was extracted with ether (3.times.20 ml) 
and the combined extracts washed with brine (50 ml) and dried (MgSO.sub.4) 
Filtration and evaporation gave an oil which was purified by flash 
chromatography (AI). The titlecompound was obtained as a solid (0.084g), 
which crystallised from ether, m.p. 9l.5.degree.-92.5.degree.. 
EXAMPLE 11 
[1.alpha.(Z), 2.beta.,5.alpha.]-(.+-.)-7-[2-(4-Morpholinyl)-3-oxo-5-[ 
(5-phenylthien-2-yl)methoxy]cyclopentyl]-5 -heptenoic acid 
A solution of the product of Example (2a) (0.48 g) in Analar acetone (15 
ml) at -10.degree. was treated with Jones reagent (2.67M, 0.46 ml) and the 
mixture then stirred at 20.degree. for 2 h. Excess reagent was destroyed 
with 2-propanol and the suspension then adjusted to pH 6.5 with KH.sub.2 
PO.sub.4 solution. The solvent was removed in vacuo and the residue 
extracted with EA (5.times.50 ml). The combined extracts were dried 
(MgSO.sub.4), filtered and concentrated. The residue was purified by 
column chroamtography (F) followed by (AM), followed by preparative TLC 
(Merck 5717) using 92.5:7.5 dichloromethane-methanol as eluent to give the 
title compound as a foam (0.075 g). 
IR (CHBr.sub.3) 3500, 1740, 1705 cm.sup.-1. TLC 92.5:7.5 
dichloromethane-methanol R.sub.f 0.35. 
EXAMPLE 12 
[1.alpha.(Z),2.beta.,5.alpha.]-(.+-.)-7-[2-(4-Morpholinyl)-3-oxo-5-[(2-phen 
ylthien-4-yl)methoxy]cyclopentyl]-5-heptenoic acid 
The product of Example (1b) (0.9 g) was stirred with 2N NaOH (5 ml) in 
methanol (10 ml) for 3h. The methanol was removed in vacuo and KH.sub.2 
PO.sub.4 solution added until pH 6.5. The mixture was then extracted with 
EA (3.times.15 ml), washed with brine, dried (MgSO.sub.4) and 
concentrated. the product (0.94 g) was oxidised according to the method of 
Example (11a), except that trimethylsilyl chloride and toluene were used 
instead of triethylsilyl chloride and CH.sub.2 Cl.sub.2 respectively, to 
give the title compound (0.31 g), m.p. 111.degree.-112.degree.. 
PHARMACEUTICAL EXAMPLES 
______________________________________ 
Tablets 
Direct Compression Mg/tablet 
______________________________________ 
Active ingredient 100.00 
Microcrystalline Cellulose 
298.00 
B.P.C. 
Magnesium Stearate 2.00 
Compression Weight 400.00 
______________________________________ 
The active ingredient is sieved through a 250 m.sup.-6 sieve, blended with 
the excipients and compressed using 10.0 mm punches. Tablets of other 
strengths may be prepared by altering the compression weight and using 
punches to suit. 
______________________________________ 
Injection for Intravenous 
Administration % w/v 
______________________________________ 
Active ingredient 0.50 
Water for injections B.P. to 
100.00 
______________________________________ 
Sodium chloride may be added to adjust the tonicity of the solution and the 
pH may be adjusted to that of maximum stability and/or to facilitate 
solution of the active ingredient using either dilute acid or alkali. 
The solution is prepared, clarified and filled into appropriate sized 
ampoules sealed by fusion of the glass. The injection is sterilised by 
heating in an autoclave using one of the acceptable cycles. Alternatively 
the solution may be sterilised by filtration and filled into sterile 
ampoules under aseptic conditions. The solution may be packed under an 
inert atmosphere of nitrogen. 
______________________________________ 
Inhalation Cartridges 
/cartridge 
______________________________________ 
Active ingredient (micronised) 
3 mg 
Lactose B.P. to 25 mg 
______________________________________ 
The active ingredient is micronised so that the majority of the particles 
are between 1m.sup.-6 and 5m.sup.-6 in longest dimension and none are 
greater than 10m-6. The active ingredient is then blended with the lactose 
and the mix is filled into No. 3 hard gelatin capsules using a suitable 
filling machine. 
British Patent Specification 2028805A referred to above corresponds to U.S. 
patent application Ser. No. 056416 (Collington et al.) U.S. Pat. No. 
4,265,891, which is incorporated herein by reference.