Patents by Inventor Nedumparambil A. Abraham
Nedumparambil A. Abraham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 4946987Abstract: Herein disclosed are N-naphthoylglycine derivatives having aldose reductase inhibiting activity. The derivatives are useful for treating, diabetic complications.Type: GrantFiled: June 20, 1988Date of Patent: August 7, 1990Assignee: Ayerst, McKenna & Harrison, Inc.Inventors: Kazimir Sestanj, Nedumparambil A. Abraham, Francesco Bellini, Adi Treasurywala
-
Patent number: 4705882Abstract: Herein disclosed are N-naphthoylglycine derivatives having aldose reductase inhibiting activity. The derivatives are useful for treating diabetic complications.Type: GrantFiled: March 28, 1986Date of Patent: November 10, 1987Assignee: Ayerst, McKenna & Harrison, Inc.Inventors: Kazimir Sestanj, Nedumparambil A. Abraham, Francesco Bellini, Adi Treasurywala
-
Patent number: 4600724Abstract: Herein disclosed are N-naphthoylglycine derivatives having aldose reductase inhibiting activity. The derivatives are useful for treating diabetic complications.Type: GrantFiled: July 17, 1985Date of Patent: July 15, 1986Assignee: Ayerst, McKenna & Harrison, Inc.Inventors: Kazimir Sestanj, Nedumparambil A. Abraham, Francesco Bellini, Adi Treasurywala
-
Patent number: 4568693Abstract: Herein disclosed are N-naphthoylglycine derivatives having aldose reductase inhibiting activity. The derivatives are useful for treating diabetic complications.Type: GrantFiled: September 9, 1983Date of Patent: February 4, 1986Assignee: Ayerst, McKenna & Harrison, Inc.Inventors: Kazimir Sestanj, Nedumparambil A. Abraham, Francesco Bellini, Adi Treasurywala
-
Patent number: 4520203Abstract: Racemic (.+-.)-1,8-diethyl-1,3,4,9-tetrahydropyrano[3,4-b]indole-1-acetic acid is resolved with cinchonine to obtain directly the pure salt of the (+)-enantiomer with cinchonine and converting the latter salt to the pure (+)-enantiomer.Type: GrantFiled: August 16, 1983Date of Patent: May 28, 1985Assignee: American Home Products CorporationInventors: Nedumparambil A. Abraham, Christopher A. Demerson
-
Patent number: 4501899Abstract: Racemic (+)-1,8-diethyl-1,3,4,9-tetrahydroprano[3,4-b]indole-1-acetic acid is resolved with cholesteryl aniline to obtain directly the pure salt of the (+)-enantiomer with cholesteryl aniline and converting the latter salt to the pure (+)-enantiomer.Type: GrantFiled: August 16, 1983Date of Patent: February 26, 1985Assignee: American Home Products CorporationInventors: Nedumparambil A. Abraham, Christopher A. Demerson
-
Patent number: 4499310Abstract: A process and intermediates for preparing 6-(lower alkoxy)-5-(trifluoromethyl)-1-naphthalenecarboxylic acid derivatives are disclosed. The derivatives are useful for preparing aldose reductase inhibitors. With reference to the process, 1,1,1-trifluoro-5-(2-methylphenyl)-2,3-pentadione 3-oxime is cyclized to give a key intermediate 3,4-dihydro-1-hydroxy-5-methyl-1-(trifluoromethyl)-2(1H)-naphthalenone oxime; and 3,4-dihydro-1-hydroxy-5-methyl-1-(trifluoromethyl)-2(1H)-naphthalenone is aromatized to 5-methyl-1-(trifluoromethyl)-2-naphthalenol with a dehydrating agent.Type: GrantFiled: June 22, 1983Date of Patent: February 12, 1985Assignee: Ayerst, McKenna & Harrison, Inc.Inventors: Kazimir Sestanj, Steven Fung, Nedumparambil A. Abraham, Francesco Bellini
-
Patent number: 4439617Abstract: Herein disclosed are N-naphthoylglycine derivatives having aldose reductase inhibiting activity. The derivatives are useful for treating diabetic complications.Type: GrantFiled: November 13, 1981Date of Patent: March 27, 1984Assignee: Ayerst, McKenna & Harrison Inc.Inventors: Kazimir Sestanj, Nedumparambil A. Abraham, Francesco Bellini, Adi Treasurywala
-
Patent number: 4408077Abstract: A process and intermediates for preparing 6-(lower alkoxy)-5-(trifluoromethyl)-1-naphthalenecarboxylic acid derivatives are disclosed. The derivatives are useful for preparing aldose reductase inhibitors. With reference to the process, 1,1,1-trifluoro-5-(2-methylphenyl)-2,3-pentadione 3-oxime is cyclized to give a key intermediate 3,4-dihydro-1-hydroxy-5-methyl-1-(trifluoromethyl)-2(1H)-naphthalenone oxime; and 3,4-dihydro-1-hydroxy-5-methyl-1-(trifluoromethyl)-2(1H)-naphthalenone is aromatized to 5-methyl-1-(trifluoromethyl)-2-naphthalenol with a dehydrating agent.Type: GrantFiled: November 13, 1981Date of Patent: October 4, 1983Assignee: Ayerst, McKeena & Harrison, Inc.Inventors: Kazimir Sestanj, Steven Fung, Nedumparambil A. Abraham, Francesco Bellini
-
Patent number: 4391816Abstract: Herein disclosed are N-(naphthalenylthioxomethyl)aminoacid derivatives having aldose reductase inhibiting activity. The derivatives are useful for treating diabetic complications.Type: GrantFiled: November 13, 1981Date of Patent: July 5, 1983Assignee: Ayerst, McKenna & Harrison Inc.Inventors: Kazimir Sestanj, Nedumparambil A. Abraham, Francesco Bellini, Adi Treasurywala
-
Patent number: 4161608Abstract: A process for preparing 11-deoxyprostaglandin E.sub.1, E.sub.2 and E.sub.3 and analogs thereof is realized by treating an appropriate di(lower)alkyl 3-(optionally substituted)-2-formylcyclopropane-1,1-dicarboxylate with an ylid prepared from a Wittig reagent of formula (AlkO).sub.2 POCH.sub.2 CO--(c)-CH.sub.3 in which Alk is an alkyl containing one to three carbon atoms and (c) is either (CH.sub.2).sub.q wherein q is an integer from 1 to 6 or cis CH.sub.2 CH.dbd.CH(CH.sub.2).sub.r wherein r is an integer from 0 to 3 to obtain the corresponding compound of formula: ##STR1## in which R.sup.2 is hydrogen, lower alkyl or CH.sub.2 OR.sup.3 wherein R.sup.3 is lower alkanoyl, R.sup.4 is lower alkyl and (c) is as defined herein. The latter compound is reduced with an alkali metal borohydride to yield the corresponding alcohol derivative. Condensation of this alcohol derivative or preferably its corresponding tetrahydropyran-2-yl ether derivative with a triester of formula CH(COOR.sup.6).sub.2 --(a)-(CH.sub.Type: GrantFiled: January 27, 1978Date of Patent: July 17, 1979Assignee: Ayerst, McKenna and Harrison LimitedInventors: Nedumparambil A. Abraham, Jehan F. Bagli, Tibor Bogri
-
Patent number: 4144251Abstract: Prostaglandin derivatives of the formula ##STR1## in which R.sup.4, R.sup.5, R.sup.6 and R.sup.7 each are hydrogen or lower alkyl, X is hydroxy and Y is hydrogen or X and Y together are oxo, Z is CH.sub.2 CH.sub.2 or trans CH.dbd.CH, m is an integer from one to three and n is an integer from two to five, with the proviso that at least one of R.sup.4, R.sup.5 or R.sup.6 is hydrogen, are disclosed together with a process for their preparation. The compounds in which Z is CH.sub.2 CH.sub.2 and the process are new. The new derivatives possess hypotensive, antihypertensive, bronchospasmolytic, gastric acid secretion inhibiting, abortifacient, estrus synchronizing and ovulation regulating properties. These compounds also inhibit the aggregation of platelets and promote the disaggregation of aggregated platelets. Methods for their use are also disclosed.Type: GrantFiled: December 2, 1977Date of Patent: March 13, 1979Assignee: American Home Products CorporationInventors: Nedumparambil A. Abraham, Jehan F. Bagli, Tibor Bogri
-
Patent number: 4118380Abstract: Compounds of the formula 1 or 1a ##STR1##HSCH.sub.2 CH.sub.2 CO-A-Phe-Phe-Trp-Lys-Thr-Phe-Thr-Ser-NHCH.sub.2 CH.sub.2 SH (1a)in which A is Gly-Asn or Lys-Gly, or therapeutically acceptable salts thereof are disclosed. The compounds of formulae 1 and 1a are useful for the management of diabetes and the treatment of acromegaly in mammals. Compositions and methods for their use also are disclosed.Type: GrantFiled: July 25, 1977Date of Patent: October 3, 1978Assignee: Ayerst, McKenna & Harrison LimitedInventors: Hans U. Immer, Nedumparambil A. Abraham
-
Patent number: 4100343Abstract: A process for preparing 11-deoxyprostaglandin E.sub.1, E.sub.2 and E.sub.3 and analogs thereof is realized by treating an appropriate di(lower)alkyl 3-(optionally substituted)-2-formylcyclopropane-1,1-dicarboxylate with an ylid prepared from a Wittig reagent of formula (AlkO).sub.2 POCH.sub.2 CO-(c)-CH.sub.3 in which Alk is an alkyl containing one to three carbon atoms and (c) is either (CH.sub.2).sub.q wherein q is an integer from 1 to 6 or cis CH.sub.2 CH.dbd.CH(CH.sub.2).sub.r wherein r is an integer from 0 to 3 to obtain the corresponding compound of formula: ##STR1## in which R.sup.2 is hydrogen, lower akyl or CH.sub.2 OR.sup.3 wherein R.sup.3 is lower alkanoyl, R.sup.4 is lower alkyl and (c) is as defined herein. The latter compound is reduced with an alkali metal borohydride to yield the corresponding alcohol derivative. Condensation of this alcohol derivative or preferably its corresponding tetrahydropyran-2-yl ether derivative with a triester of formula CH(COOR.sup.6).sub.2 -(a)-(CH.sub.Type: GrantFiled: November 11, 1976Date of Patent: July 11, 1978Assignee: Ayerst, McKenna & Harrison LimitedInventors: Nedumparambil A. Abraham, Jehan F. Bagli, Tibor Bogri
-
Patent number: 4093610Abstract: A new process for preparing the cyclic dodecapeptide triglycyl-lysine vasopressin of the formula ##STR1## which comprises the preparation of a first hexapeptide of formula Boc--Gly--Gly--Gly--Cys(Trt)--Tyr--Phe--NHNH.sub.2 and a second hexapeptide of formula H--Gln(Mbh)--Asn(Mbh)--Cys(Trt)--Pro--Lys(Boc)--Gly--NH.sub.2 by a series of condensations involving the reaction of an appropriately protected peptide unit having an activated carboxyl with an appropriately protected peptide having a free amino group. Subsequently, the first and second hexapeptides are condensed according to the azide coupling method to obtain the linear protected dodecapeptide of formula Boc--Gly--Gly--Gly--Cys(Trt)--Tyr--Phe--Gln(Mbh)--Asn(Mbh)--Cys(Trt)--Pro- -Lys(Boc)--Gly--NH.sub.2 ; thereafter the linear protected dodecapeptide is transformed into the desired cyclic dodecapeptide, triglycyllysine vasopressin, by oxidizing and deprotecting processes.Type: GrantFiled: January 31, 1977Date of Patent: June 6, 1978Assignee: American Home Products CorporationInventors: Nedumparambil A. Abraham, Hans U. Immer, Kazimir Sestanj
-
Patent number: 4092427Abstract: 15- And/or 16-alkyl derivatives of 9,15-dioxygenated prost-13-enoic, prosta-4,13-dienoic and prosta-5,13-dienoic acid, lower alkyl esters thereof and homologs thereof, as well as a process for preparing these derivatives are disclosed. The compounds possess hypotensive, anti-hypertensive, bronchospasmolytic, gastric acid secretion inhibiting, abortifacient, estrus synchronizing and ovulation regulating properties. The compounds also inhibit the aggregation of platelets and promote the disaggregation of aggregated platelets. Methods for their use are also disclosed.Type: GrantFiled: June 15, 1976Date of Patent: May 30, 1978Assignee: American Home Products CorporationInventors: Nedumparambil A. Abraham, Jehan F. Bagli, Tibor Bogri
-
Patent number: 4089898Abstract: A process for preparing 11-deoxyprostaglandin E.sub.1, E.sub.2 and E.sub.3 and analogs thereof is realized by treating an appropriate di(lower)alkyl 3-(optionally substituted)-2-formylcyclopropane-1,1-dicarboxylate with an ylid prepared from a Witting reagent of formula (AlkO).sub.2 POCH.sub.2 CO-(c)-CH.sub.3 in which Alk is an alkyl containing one to three carbon atoms and (c) is either (CH.sub.2).sub.q wherein q is an integer from 1 to 6 or cis CH.sub.2 CH.dbd.CH(CH.sub.2).sub.r wherein r is an integer from 0 to 3 to obtain the corresponding compound of formula: ##STR1## in which R.sup.2 is hydrogen, lower alkyl or CH.sub.2 OR.sup.3 wherein R.sup.3 is lower alkanoyl, R.sup.4 is lower alkyl and (c) is as defined herein. The latter compound is reduced with an alkali metal borohydride to yield the corresponding alcohol derivative. Condensation of this alcohol derivative or preferably its corresponding tetrahydropyran-2-yl ether derivative with a triester of formula CH(COOR.sup.6).sub.2 -(a)-(CH.sub.Type: GrantFiled: November 11, 1976Date of Patent: May 16, 1978Assignee: Ayerst, McKenna & Harrison Ltd.Inventors: Nedumparambil A. Abraham, Jehan F. Bagli, Tibor Bogri
-
Patent number: 4048328Abstract: 15- And/or 16-alkyl derivatives of 9,15-dioxygenated prost-13-enoic, prosta-4,13-dienoic and prosta-5,13-dienoic acid, lower alkyl esters thereof and homologs thereof, as well as a process for preparing these derivatives are disclosed. The compounds possess hypotensive, anti-hypertensive, bronchospasmolytic, gastric acid secretion inhibiting, abortifacient, estrus synchronizing and ovulation regulating properties. The compounds also inhibit the aggregation of platelets and promote the disaggregation of aggregated platelets. Methods for their use are also disclosed.Type: GrantFiled: June 15, 1976Date of Patent: September 13, 1977Assignee: American Home Products CorporationInventors: Nedumparambil A. Abraham, Jehan F. Bagli, Tibor Bogri
-
Patent number: 4048329Abstract: 15- And/or 16-alkyl derivatives of 9,15-dioxygenated prost-13-enoic, prosta-4,13-dienoic and prosta-5,13-dienoic acid, lower alkyl esters thereof and homologs thereof, as well as a process for preparing these derivatives are disclosed. The compounds possses hypotensive, antihypertensive, bronchospasmolytic, gastric acid secretion inhibiting, abortifacient, estrus synchronizing and ovulation regulating properties. The compounds also inhibit the aggregation of platelets and promote the disaggregation of aggregated platelets. Methods for their use are also disclosed.Type: GrantFiled: June 15, 1976Date of Patent: September 13, 1977Assignee: American Home Products CorporationInventors: Nedumparambil A. Abraham, Jehan F. Bagli, Tibor Bogri
-
Patent number: 4036856Abstract: A process for preparing 11-deoxyprostaglandin E.sub.1, E.sub.2 and E.sub.3 and analogs thereof is realized by treating an appropriate di(lower)alkyl 3-(optionally substituted)-2-formylcyclopropane-1,1-dicarboxylate with an ylid prepared from a Wittig reagent of formula (AlkO).sub.2 POCH.sub.2 CO-(c)-CH.sub.3 in which Alk is an alkyl containing one to three carbon atoms and (c) is either (CH.sub.2).sub.q wherein q is an integer from 1 to 6 or cis CH.sub.2 CH=CH(CH.sub.2).sub.r wherein r is an integer from 0 to 3 to obtain the corresponding compound of formula: ##STR1## in which R.sup.2 is hydrogen, lower alkyl or CH.sub.2 OR.sup.3 wherein R.sup.3 is lower alkanoyl, R.sup.4 is lower alkyl and (c) is as defined herein. The latter compound is reduced with an alkali metal borohydride to yield the corresponding alcohol derivative. Condensation of this alcohol derivative or preferably its corresponding tetrahydropyran-2-yl ether derivative with a triester of formula CH(COOR.sup.6).sub.2 --(a)-(CH.sub.Type: GrantFiled: November 11, 1976Date of Patent: July 19, 1977Assignee: Ayerst McKenna and Harrison Ltd.Inventors: Nedumparambil A. Abraham, Jehan F. Bagli, Tibor Bogri