baber/WOPTO huggingface dataset:
Patent KR-810001958-B1 (KR)
Title: Process for preparing moranolin derivatives
Inventor: YAOYAKI Y
IPC: C07D211/06
Filed: 1978-03-10
Granted: 1981-12-01
Abstract: Moranolin derivs. (I; X = O, S; R = H, Me, Et, Ph, MeOH) and their salts useful as blood sugar lowering agent, were prepd. by reaction of I(R1 = H, protection group of OH) and II followed by redn. to elimenate the protection group.  Thus, 14 g ethylenebromhydrine and 15 g anhydrous CaCO3 were reacted with 1.2 g tetra-o-benzylmoranolin in 100 ml DFM, at 85-95≰C for 6hr, to give 12.5 g N-hydroxyethyl-tetra-o-benzyl moranolin, which was reduced by 47% HBr, at 100 ≰C for 1 hr, to give 1.72 g I(X = OH; R = H)
Patent KR-820000776-B1 (KR)
Title: Process for the preparation of 1-phenylethanol amine derivatives
Inventor: PRESTON J
Filed: 1978-08-30
Granted: 1982-05-10
Abstract: Six 1-phenylethanolamines (I; R2,R3 = H or C1-4 alkyl; A = C1-4 alkylenediradical; θ=phenylacetyl, phenoxy, acetyl, phenylaminocarbonyl or C4-20 alkanoyl) useful as topical inflammation inhibitors at 20 μg-5 mg daily, were prepd.  Thus, 4,3,5-(H2N)Cl2C6H2COCHOH2O was condenced with H2NCMe2CH2NHCO-CH2Ph and the product reduced by NaBH4 to give I (R2=R3=Me, A = CH2, θ=COCH2PH), isolated as the dihydrochloride.
Patent KR-810001246-B1 (KR)
Title: Process for the preparation of dehalogenation of halogen-containing aromatic compounds
Inventor: FONT J
Filed: 1978-09-22
Granted: 1981-09-30
Abstract: Arom. haloamino compds. were manufd. by partial dehalogenation of halogenated arom. amine in the vapor phase at 280-420oC by H in the presence of calcined, Al2O3-supported catalysts.  Thus, 100 g flash Al2O3(grain size 20-100μ) was impregnated with Mg(NO3)2 and calcined at 950oC for 3 hr.  The calcined catalyst contg. 5 % Mg was impregnated with aq. CuCl2, to give a final Cu content of 6 %, and dried at 200oC.  Vaporized 2,3,4,5-tetrachloronitrobenzene(I; 100 g) and 75l H were passed during 1 hr through a bed of 100 g catalyst at 310oC.
Patent KR-800001565-B1 (KR)
Title: Provisions for ornamental fish
Inventor: SONG HAE JOON
IPC: A23K1/18
Filed: 1979-03-24
Granted: 1980-12-28
Abstract: Solid tubificids(Limnodrilus)useful for ornamental fish feed, were prepd. by vacuum freeze-drying. Thus, clean tubificids were filled with water in 10-20mm depth dishes, lightly squeezed water from dishes, quickly freezed to -40≰C, heated to 40-50≰C for 60-120 min without volume decrease of frozen materials, stopped heating to 30-40≰C, and operated in this procedure to give dry solidification over again 5-6 time for 7-15 hr.
Patent KR-840000385-B1 (KR)
Title: Bus connection system
Inventor: KURAKAKE MITSUO
IPC: G06F3/00
Filed: 1980-01-18
Granted: 1984-03-27
Abstract: Data transmission and reception between a central processing unit, a memory, an input/output control circuit or a like peripheral circuit is performed via a bus in this bus connection system.  Thus, a plurality of buses are each connected to the central processing unit via a driver and a receiver, and the driver and the receiver are controlled by the central processing unit.
Patent KR-840001718-B1 (KR)
Title: Process for the preparation of nitrodiphenyl ether
Inventor: JOHNSON WAYNE ORRIN
IPC: F16J15/24
Filed: 1980-05-14
Granted: 1984-10-17
Abstract: Herbicidal title compds. I(X=H, halo, trihalomethyl; X1=H; X2=trihalomethyl, halo; Y=O, NH, S; R1,R2=H, lower alkyl, benzyl, n=1-4; Z=carboxy or its salt, ester and amide) were prepd. by reaction of II and HY(CR1R2)nZ at 120-150oC at the presence of unactive solvent. Thus, 46.2 g II(X1=H, X2=CF3, X=Cl, halo=OH) in 100ml dimethylsulboxide was mixed with 17.7g KCO3 at 60oC folloed by reation with tert-butylbromoacetate to give 104.8g I(X1=H, X2=CF3, X=Cl, Y=O, R1,R2=H, n=1,Z=CO2-tert-Bu).
Patent KR-830001879-B1 (KR)
Title: 구두뒷축의 제조방법
IPC: A43B21/00
Filed: 1982-04-15
Granted: 1983-09-17
Abstract: 내용 없음.
Patent KR-860000926-B1 (KR)
Title: Bucket reversing apparatus
Inventor: FUKUJAWA MUTSUO
IPC: B65G65/20
Filed: 1982-09-17
Granted: 1986-07-19
Abstract: Buckets (8) of the reclaimer, are fixed and reversed by the lever (21). The lever (21) has a supporting-pin hole (21b), a cotter hole (21c) and projecting parts (21d, 21e). In order to reverse the direction of the buckets, the cotters (23) must be released. Each bracket (25) is constantly established on the cylindrical surface of the bucket wheel (7). The shafts (26) are adhered to the buckets (8).
Patent KR-840000093-B1 (KR)
Title: Method of sewing machine table base
Inventor: KO SHI-KYUN
IPC: D05B73/00
Filed: 1982-11-19
Granted: 1984-02-10
Abstract: In the method of new manufacturing a base of sewing machine table which had manufactured with veneer board in the past, we paint on the base with polymer coatin resin, accumulate a mat, unsaturated polyester, and sawdust or straw.  And after hard board which is made before is dried in natural, the base which carried out the casting box is manufactured by applying heat to the base in a state of temperature(about 60↿˜70≰C)
Patent KR-890000445-B1 (KR)
Title: Arrangement for transferring heavy work pieces
Inventor: SCHEDWIN SVEN-ERIK
IPC: B25J19/00
Filed: 1982-12-29
Granted: 1989-03-17
Abstract: The conveyor for transporting heavy work pieces from a transport position to a machining position, or vice versa, has a pair of arms. These are telescopically extendable to bridge the distance between the positions.  Supports in the fully or partly extended position engage and support the arms adjacent to their outer ends.  The inner ends of the arms can be attached to the outside of a housing which is rotatably journalled in a base.  A table for supporting one or more workpieces is, in turn, rotatably journalled in the housing.  The outer ends of respective sections in the telescopic arms have rollers to form a path for a workpiece carriage.
Patent KR-900001214-B1 (KR)
Title: 1-aryloxy-2,3,4,5-thtrahydro-3-benzazepines, and the preparation process thereof
Inventor: EFFLAND RICHARD C
IPC: C07D233/16
Filed: 1983-06-11
Granted: 1990-02-28
Abstract: 1-Arylony-2,3,4,5-tetrahydro-3-benzazepines of formula (I) are prepard.  In (I), Y1 and Y2 are each H or lower alkoxy; X is H, alogen, lower alkyl, lower alkoxy, CF3, CN, NO2 or NH2; R is H, lower alkyl, cycloalkyl-lower alkyl, aryl-lower alkyl or alkyleneamine. (I) are useful as antidepressants, antihypertensives and analgesics.
Patent KR-910005970-B1 (KR)
Inventor: SIGAI GIGUO
IPC: G06F11/14
Filed: 1983-06-22
Granted: 1991-08-09
Abstract: 내용 없음.
Patent KR-910000077-B1 (KR)
Title: Poly (arylene sulfide) printed circuit boards
Inventor: VOLTINGHAUSE HAROLD D
IPC: H05K1/03
Filed: 1983-08-18
Granted: 1991-01-19
Abstract: A printed circuit board is made of a poly(arylene sulfide) board and a conductive metal deposited on the board by electroless plating. Adhesion between the poly(arylene suifide) and the conductive metal is improved by allowing the plated poly(arylene sulfide) to age.
Patent KR-860000972-B1 (KR)
Title: Boats
Inventor: HONG KWANG-SON
IPC: B63C5/00
Filed: 1984-05-09
Granted: 1986-07-24
Abstract: This boat consists of a main body(100), a safety tube(200), and a windscreen(300). The body is made of glass fabric, enforced synthetic resin. For stiffness and shock resistance it is reinforced by horizontal and vertical beams (103 - 107). A hollowed safety tube holder(102) is made in the upper portion of the boat. A long hole(114) for fixing the safety tube and holes(115) for fixing the windscreen are made in this tube holder. The safety tube has the first tube portion and the second tube portion. It is connected to the first tube. It fixes the tube on the body by a joint in the tube holder. The snapper of the windscreen is joined to the hole(115) and fixes the screen to the body.
Patent KR-930000775-B1 (KR)
Title: Laminated safety pane
Inventor: BRAVET JEAN-LOUIS
IPC: B32B17/10
Filed: 1984-07-11
Granted: 1993-02-04
Abstract: 1. A laminated pane comprising only a glass sheet and a layer of transparent plastics material, characterised in that the layer of transparent plastics material has properties of absorption of energy and interior protection defined by a scratch resistance greater than 20 g measured with the Erichsen type 413 apparatus and an abrasion resistance according to European Standard R43 such that the haze difference is less than 4% and at a thickness of about 0.5 mm a flow stress sigma y at -20 degrees C not exceeding 3 daN/mm**2 , a rupture stress sigma R at +20 degrees C of at least 2 daN/mm**2 , a lengthening at rupture epsilon R at +20 degrees C from 250% to 500%, and a tear resistance Ra at +20 degrees C of at least 9 daN/mm**2 , and in that the layer of plastics material is formed essentially of a polyurethane obtained by continuous reactive casting on a flat horizontal support of a reaction mixture of an isocyanate component and a polyol component, the isocyanate component comprising at least one aliphatic or cycloaliphatic di-isocyanate or a di-isocyanate prepolymer, this component having a viscosity measured at +40 degrees C less than about 5 Pas, the isocyanate component containing urea functions, the content of urea being up to 10% of the total weight of isocyanate component, the urea content preferably being from 5 to 7%, and the polyol component comprising at least one long difunctional polyol of molecular weight from 500 to 4000 and at least one short polyol as a chain lengthening agent, the ratio of isocyanate group equivalents to hydroxyl group equivalents is about 1, and the proportions between the different polyols are selected so that the number of hydroxyl group equivalents due to the short diol represents from 20 to 70% of the total hydroxyl groups.
Patent KR-890004814-B1 (KR)
Title: Fluidized bed incinerating device
Inventor: SATTO GENICHI
IPC: F23G5/30
Filed: 1984-10-10
Granted: 1989-11-27
Abstract: A fluidised bed thermal reactor has a vertical furnace housing with a rectangulmr cross-section.  Gas is introduced via a diffuser plate at the base of the housing and creates a fluidized bed with a central region which moves downwards and an outer region which moves upwards.  Excess material falls from the edges of the bed and is discharged. Energy from the flue gases is extracted by a water-cooled heat exchanger at the top of the housing but offset horizontally.  The walls of the housing converge vertically to form a throat, which limits the height of the fluidized bed.
Patent KR-860001841-B1 (KR)
Title: Positive photoresist stripping composition
Inventor: THOMAS EVAN G
IPC: H01L21/30
Filed: 1984-12-20
Granted: 1986-10-24
Abstract: Piperazine derivs. I, II, III, and IV (n=1-6) having or not having C1-6alkyl or C5-6cycloalkyl branched chains with or without the adn. of alkyl or cycloalkyl-2-pyrrolidones (V: R=C1-6 alkyl, C5-6 cycloalkyl, C1-6 aminoalkyl, C1-6 hydroxyalkyl), amides(b.p.> 2000), and high-boiling diethylene glycol ethers are used as the stripping compns. for pos. photoresists. Thus, a 1micro thick film of the pos. photoresist (Shipley 1470) coated on a wafer was prebaked at 900, then baked 1350 and 2000 for 30min, soaked in a soln. of N-methyl-2- pyrrolidone 10 and N-aminoethyl-piperazine 30% at 700 for 4.5 min. rinsed in deionized H2O and dried to completely strip the photoresist layer from the wafer.
Patent KR-920007463-B1 (KR)
Title: Process for preparation of 1-dethia 2-thiacephalosporanic acid derivatives
Inventor: DEUTSCH JEAN G
IPC: A61K31/535
Filed: 1985-02-13
Granted: 1992-09-03
Abstract: The following 1-dethia-2-thia-cephem cpds., within the scope of formula (I) of the parent patent, their internal salts and acid addn. salts are new: (1) 5-A-2-CF3-thiazolo (4,5-c)pyridinium (6S,7S,Z); A = (3-(7-(((2-amino-4-thiazolyl) (methoxyimino)acetyl) amino)-2-carboxy-8-oxo-4-thia-1- aza-bicyclo(4,2,0) -oct-2-en-3-yl)-2(E)-propenyl; (2) 7-(((2-amino-4-thiazolyl)(methoxy imino)acetyl)amino)-3-(3-(1,4-dihydro-3-formylamino -4-oxo-1-pyridyl)-1 (E).propenyl)8-oxo-4-thia -1-azabicyclo(4,2,O) -oct-2-ene-2-carboxylic acid (6S,7S,Z); (3) 5-8-thieno(3,2-c)pyridin ium (6S,7S, Z); B is as A but difluromethoxyimino replaces methoxyimino; (4) 5-B-4-methyl-thieno (3,2-c)pyridinium (6S,7S,Z); (5) 5-C-thiazolo (4,5-c)pyridinium(6S,7S, Z); C is as A but fluoromethoxyimino replaces methoxyimino; (6) 5-C-4-methyl-thieno (3,2-c)pyridinium (6S,7S,Z); (7) 5-C-thieno(3,2-c)pyridinium (6S,7S,Z); (8) 5-A-thiazolo (4,5-c)pyridinium(6S,7S, Z); (9) 5-A-2-methyl -1H-imidazolo(4,5-c) pyridinium(6S,7S,syn); (10) 5-A-2-phenyl-oxazolo(4,5-c) pyridinium(6S,7S,syn); (11) 5-A-2-ethyl-thiazolo(4,5-c) pyridinium(6S,7S,syn); (12) 5-B-thiazolo(4,5-c)pyridinium(6S, 7S,syn); (13) 2-amino-5-B-thiazolo(4,5-c) pyridinium(6S,7S,syn); (14) 7-c-thieno(2,3-b)pyridinium; (15) 1-A-1-(2-(5-nitro -1H-imidazol-1-yl) ethyl)pyrrolidinium(6S,7S,Z); (16) 7-(3-(7-(((5-amino -1,2,4-thiadiazol -3-yl)(methoxyimino)acetyl) amino)-2-carboxy-8-oxo -4-thia-1-azabi cyclo(4,2,0)oct-2 -en-3-yl)-2(E) - propenyl)thieno(2,3-b) pyridinium(6S,7S,syn); (17) (2,2-dimethyl -1-oxopropoxy)methyl 7-(((2-amino-thiazol-4-yl) (methoxyimino)acetyl) amino)-8-oxo-3-(3- ((1,3,4-thiadiazol-2-yl) thio)-1(E)-propenyl) -4-thia-1-azabi cyclo-(4,2,O) oct-2-en-2-carboxylate. -
Patent KR-890002646-B1 (KR)
Title: Paint supply apparatus for rotary painting machine
Inventor: KAORU KAWAMURA
IPC: B05B15/10
Filed: 1985-09-18
Granted: 1989-07-22
Abstract: The appts. has a revolvable turnatable (2), a plurality of angularly spaced extending barrels (7a-7h) made of wire mesh with respective rotation axes (6), each of the barrels having a batch of parts and a painting station (12).  There also are a setting station (13), a baking and drying-station (14) and a cooling station (15).  Thus a batch of parts introduced into the barrels (7) is painted by passing each of the barrels via each of the stations while each barrel is rotated on its axle (6) as the turntable (2) is intermittently revolved by a single pitch equal to the angular spacing between mutually adjacent ones of the barrels.
Patent KR-930001784-B1 (KR)
Title: Surface treated metallic filaments and process for making
Inventor: LUXON BRUCE A
IPC: C08J5/06
Filed: 1985-11-12
Granted: 1993-03-13
Abstract: Metallic filaments, esp., metal-coated fibers, are surface treated by a combination of silane and poly (vinyl acetate) and exhibit improved processability when used in the form of filaments, yarns or tows in knitting and weaving machines, and produce composities with thermosetting organic polymers, having enhanced physical properties.
Patent KR-890001226-B1 (KR)
Title: A processing control device used micro processor
Inventor: YUN PUNG
IPC: G06F19/00
Filed: 1985-12-23
Granted: 1989-04-27
Abstract: The circuit for controlling the process with individual process program and storing input parameter after controlling comprises an input cct. composed of a sensor input port (1) for receiving analog signal, a multiplexer (2), an A/D converter (3), and an output port (4); a control cct. composed of clock generator (5), a CPU (6), a ROM control cct. (7), a RAM (8), a system ROM (9), and a PROM (10) for storing the individual process control program and interrupt functions; an output cct. composed of an output port (11), a D/A converter (12), a system actuator (13); a floppy disk driver (14); and a monitor (15).
Patent KR-950004528-B1 (KR)
Title: Apparatus for pulling forward or holding back moving metal strips
Inventor: UMLAUF NORBERT
IPC: B65H20/20
Filed: 1986-03-15
Granted: 1995-05-02
Abstract: 1. A device for pulling forward or holding back metal strips or sheets, particularly for several narrow metal strips which are to be wound up together and are to have separate braking applied to each strip, preferably in strip lines between two oppositely disposed, endlessly circulating conveyor chain systems (3, 4), driven by chain wheels (23), which clamp the strip or sheet (9) by means of carriage-like roller units (7) which are guided on rails in a straight entraining zone (12), characterised by guiding means for each chain system (3, 4) that is curved along its whole length except for the entraining zone (12).
Patent KR-890001982-B1 (KR)
Title: Gas detector for alpha-fe2o3 gas
Inventor: GO JAE-GUI
IPC: G01N27/62
Filed: 1986-06-09
Granted: 1989-06-05
Abstract: A gas detecting element having an alpha-ferric oxide sintered body is made by (i) adding 15-35 mol.% metal ions to ferric salt containing sulphate ions, (ii) hydrolysing in distilled water keeping the regular temperature of 50 deg.C, (iii) adding liquid ammonia to the generated solution at 50 deg.C up to pH 7.2, (iv) drying the resulting precipitate at 110 deg.C for 16 hours, and (v) sintering the dried powder under 500 kg/cm2 pressure for 1 hour.
Patent KR-890002968-B1 (KR)
Title: Commutator manufacture(the process of manufacturing commutator)
Inventor: KIM SI-HUN
IPC: H01R39/04
Filed: 1986-06-11
Granted: 1989-08-14
Abstract: The liquid resin which is same with the insulator resin is spread on the commutator segments (1) and bushing (11) surface and the insulator resin (13) is injected to increase the combining strength between the commutator segments, bushing and the insulating resin. The projection (3) for reinforcing the combining strength is buried by the resin injection to improve the mechanical combining force of segment.
Patent KR-940006593-B1 (KR)
Inventor: ROLLAND ANNE
IPC: A61P25/28
Filed: 1986-06-24
Granted: 1994-07-23
Abstract: 내용 없음.
Patent KR-900005174-B1 (KR)
Title: Apparatus for the crushing of material
Inventor: HENNE HEINRICH
IPC: B02C4/28
Filed: 1986-07-07
Granted: 1990-07-20
Abstract: The press is for simultaneously removing water from and crushing material having a high moisture content by passage between two rolls (2,3) which are urged together under high pressure: It comprises a screw (4) conveyor for simultaneously subjecting the material to mechanical precompression and forcible direct delivery between the two rolls. The fluid flow from the moisture removal is forced to the sides of the rollers and backward of the direction of material movement during crushing. A blade separaes (10) fluid from the emerging crushed material. Wiping strips (11,12,13) cooperate with the end and peripheral faces of the rolls for separating fluid pressed out of the material and carried along by the rolls during their rotation.
Patent KR-900000593-B1 (KR)
Title: Belt equipped seat assembly
Inventor: KOMOHARA MINORU
IPC: B60R22/26
Filed: 1986-12-27
Granted: 1990-02-01
Abstract: A seat proper includes a seat cushion part and a seat back part.  A seat side includes a pair of upper rails secured to the seat cushion and a pair of lower rails secured to flooring, the upper rails being slidably disposed to the floor structure.  The upper rails are slidably disposed on the lower rails so that the seat proper is slidable relative to the vehicle floor.  A seat belt has ends which are respectively connected to side frames of the seat cushion part through respective retainers.  There are two brackets respectively connected at their upper ends to the retainers, each bracket having a lower end formed into a first engaging portion.  A second engaging portion is separated from the rails.
Patent KR-930007989-B1 (KR)
Inventor: INOUE ATSUO
IPC: C06B47/14
Filed: 1987-01-14
Granted: 1993-08-25
Abstract: 내용 없음.
Patent KR-900005935-B1 (KR)
Title: Control method of self-keeper recording system
Inventor: KIM DONG-YONG
IPC: H04N7/18
Filed: 1987-07-07
Granted: 1990-08-16
Abstract: The method for the self-keeper recording system used in the secret place like a bank, or museum comprises the steps of: (a) setting the time to a microprocessor (5); (b) repeating process that records the picture for 5 seconds while turning on the LED and pauses for preset time if the self-keeper mode is on; (c) recording the present time on the tape; (d) and recording continuosly in the midst of pause state when the emergency state is occured so that the normal video tape can be used for long time recording.
Patent KR-900004706-B1 (KR)
Title: Reversible phase transter composition of calcium bromide hydrate
Inventor: LANE GEORGY A
IPC: C09K5/06
Filed: 1987-08-06
Granted: 1990-07-02
Abstract: An eutectic compsn. (I) comprises CaBr2.6H2O plus CaBr2.4H2O and contains above 5.4 to below 5.8 moles H2O per mole CaBr2. (I) is esp. hermetically sealed in e.g. H2O impervious films of foils of plastic and metal laminates, pipes, plastic containers etc. to form a heat storage device. (I) pref. further contains a KBr or NaBr additive in amts. of 0.5-8 wt.% to lower the freezing point of (I). Hermetically sealed (I) can be used in conjunction with solar heating systems in buildings or in heat exchange systems where exchange coils are positioned within bulk containers contg. (1).
Patent KR-940008421-B1 (KR)
Title: 9-deazaguanines
Inventor: KOSTLAN CATHERINE R
IPC: A61P43/00
Filed: 1987-08-26
Granted: 1994-09-14
Abstract: The present invention is novel derivatives of pyrrolo[3,2-d]pyrimidines and pharmaceutical compositions and methods of use therefor. The derivatives are inhibitors of purine nucleoside phosphorylase selectively cytotoxic to T-cells but not to B-cells in the presence of 2'-deoxyguanosine and, therefore, are for use in the treatment of autoimmune diseases, gout, psoriasis or rejection of transplantation.
Patent KR-900003718-B1 (KR)
Title: Electric blower
Inventor: NA KYUNG-CHAN
IPC: F04D27/00
Filed: 1987-08-29
Granted: 1990-05-30
Abstract: The system is operated automatically according to the approaching distunce of a person. When the person approaches within a certain radius from the fan, an infrared transmitter receiver (1) placed in front of the fan senses the approaching state and turns the fan speed to high. When the person approaches too colse to the fan, it stops the operation. From the start to the stop, the fan speed is controlled according to the approaching distance of the person.
Patent KR-960015038-B1 (KR)
Title: Dehydrogenation process of 3-oxo-4-azasteroid
Inventor: BHATTACHARYA APURBA
IPC: C07J75/00
Filed: 1988-06-28
Granted: 1996-10-24
Abstract: A process for dehydrogenating a compound of the formula <CHEM>   <CHEM> which comprises reacting the compound with a silylating agent in the presence of a quinone to introduce a DELTA <1> double bond. Novel intermediates are compounds of the formula <CHEM>  wherein:  Q is absent or is <CHEM> where R<4> is methyl, C1-8 straight or branched chain alkyl, C3-6 cycloalkyl, phenyl, or combinations thereof; and R<1><4> is hydrogen, C1-6 alkyl, C1-6 straight or branched chain alkoxy, halo, nitro or cyano.
Patent KR-960007803-B1 (KR)
Title: Peroxy carboxylic amino derivatives
Inventor: VENTURELLO CARLO
IPC: C11D3/39
Filed: 1988-11-12
Granted: 1996-06-12
Abstract: There are disclosed salts of amino-(poly)percarboxylic acids having the formula: <CHEM> wherein R, R1 and R2 represent hydrogen or alkyl or two groups R, R1 and R2 are taken together with the nitrogen atom to result in a heterocyclic ring. A represents (cyclo)alkylene , arylene, cycloalkylene-alkylene, alkylene-cycloalkylene, arylene-alkylene or alkylene-arylene, said alkylene units optionally having interspersed CONR3 groups, wherein R3 is hydrogen, alkyl or aryl; X represents HSO4 or CH3SO3; and n is an integer of from 1 to 6. Also disclosed is a process for their preparation and their use as bleaching agents.
Patent KR-960000642-B1 (KR)
Title: Electrochemical synthesis of 2-methyl-5-pyrazinoic acid
Inventor: FOA MARCO
IPC: C25B3/23
Filed: 1988-11-19
Granted: 1996-01-10
Abstract: There is disclosed a process for the preparation of 2-methyl-5-pyrazinoic acid which comprises oxidizing electrochemically a compound having formula: <CHEM> wherein X is -OH, Cl, Br, -O-CO-R, -O-SO2-R, in which R is a C1-C5 alkyl radical, optionally substituted with F or Cl, or it is a C6-C12 aryl radical, in an aqueous alkaline medium, at a temperature ranging from 20 DEG C to 90 DEG C, by using anodes coated with nickel oxide-hydroxide.