Patents by Inventor Ashokkumar B. Shenvi
Ashokkumar B. Shenvi 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).
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Patent number: 9463450Abstract: A highly fluorinated polymer is very useful as an acid catalyst. The highly fluorinated polymer has at least two repeating unit types that are the polymerized derivatives of a perfluorinated cyclic or cyclizable compound and a highly fluorinated vinyl ether compound having a sulfur containing functional group. The polymer can be formed by radical copolymerization of the fluorinated monomers with the sulfur-containing functional group in sulfonyl fluoride form (—SO2F) that is subsequently converted to sulfonic acid form (—SO3H). The highly fluorinated polymer can be used to advantage in a solution comprising an aprotic, polar organic solvent that has a dielectric constant of at least 15 and preferably is free of hydroxyl functional groups. Suitable solvents are those in which the polymer is soluble to at least 1 wt %. Hydroxyl group-containing protic, polar organic solvents are less preferred.Type: GrantFiled: March 23, 2016Date of Patent: October 11, 2016Assignee: Compact Membrane Systems, Inc.Inventors: Ning Shangguan, Andrew Feiring, Ashokkumar B. Shenvi
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Publication number: 20160279623Abstract: A highly fluorinated polymer is very useful as an acid catalyst. The highly fluorinated polymer has at least two repeating unit types that are the polymerized derivatives of a perfluorinated cyclic or cyclizable compound and a highly fluorinated vinyl ether compound having a sulfur containing functional group. The polymer can be formed by radical copolymerization of the fluorinated monomers with the sulfur-containing functional group in sulfonyl fluoride form (—SO2F) that is subsequently converted to sulfonic acid form (—SO3H). The highly fluorinated polymer can be used to advantage in a solution comprising an aprotic, polar organic solvent that has a dielectric constant of at least 15 and preferably is free of hydroxyl functional groups. Suitable solvents are those in which the polymer is soluble to at least 1 wt %. Hydroxyl group-containing protic, polar organic solvents are less preferred.Type: ApplicationFiled: March 23, 2016Publication date: September 29, 2016Applicant: Compact Membrane Systems, Inc.Inventors: Ning Shangguan, Andrew Feiring, Ashokkumar B. Shenvi
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Patent number: 6355695Abstract: Compounds of formula I wherein Q1, Q2, Q3, Q4 and Q5 have any of the meanings given in the specification, their N-oxides, and their pharmacuetically acceptable salts are nonpeptide antagonists NKA, useful for the treatment of asthma, etc. Also disclosed are pharmaceutical compositions, processes for preparing the compounds of formula I and intermediates.Type: GrantFiled: January 5, 2001Date of Patent: March 12, 2002Assignee: Zeneca LimitedInventors: Scott C. Miller, Robert T. Jacobs, Ashokkumar B. Shenvi
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Patent number: 6235757Abstract: Compounds of formula I wherein Q1, Q2, Q3, Q4 and Q5 have any of the meanings given in the specification, their N-oxides, and their pharmacuetically acceptable salts are nonpeptide antagonists NKA, useful for the treatment of asthma, etc. Also disclosed are pharmaceutical compositions, processes for preparing the compounds of formula I and intermediates.Type: GrantFiled: March 6, 2000Date of Patent: May 22, 2001Assignee: Zeneca LimitedInventors: Scott C. Miller, Robert T. Jacobs, Ashokkumar B. Shenvi
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Patent number: 6051580Abstract: Compounds of formula I ##STR1## wherein Q.sup.1, Q.sup.2, Q.sup.3, Q.sup.4 and Q.sup.5 have any of the meanings given in the specification, their N-oxides, and their pharmaceutically acceptable salts are nonpeptide antagonists NKA, useful for the treatment of asthma etc. Also disclosed are pharmaceutical compositions, processes for preparing the compounds of formula I and intermediates.Type: GrantFiled: March 2, 1999Date of Patent: April 18, 2000Assignee: Zeneca LimitedInventors: Scott C. Miller, Robert T. Jacobs, Ashokkumar B. Shenvi
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Patent number: 5889024Abstract: Compounds of formula I ##STR1## wherein Q.sup.1, Q.sup.2, Q.sup.3, Q.sup.4 and Q.sup.5 have any of the meanings given in the specification, their N-oxides, and their pharmacuetically acceptable salts are nonpeptide antagonists NKA, useful for the treatment of asthma, etc. Also disclosed are pharmaceutical compositions, processes for preparing the compounds of formula I and intermediates.Type: GrantFiled: April 23, 1996Date of Patent: March 30, 1999Assignee: Zeneca LimitedInventors: Scott C. Miller, Robert T. Jacobs, Ashokkumar B. Shenvi
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Patent number: 5635509Abstract: Compounds of formula I ##STR1## wherein Q.sup.1, Q.sup.2, Q.sup.3, and Q.sup.4 have any of the meanings given in the specification, their N-oxides, and their pharmaceutically acceptable salts are nonpeptide antagonists of neurokinin A and useful for the treatment of asthma, etc. Also disclosed are pharmaceutical compositions, processes for preparing the compounds of formula I and intermediates.Type: GrantFiled: May 1, 1995Date of Patent: June 3, 1997Assignee: Zeneca LimitedInventors: Robert T. Jacobs, Scott C. Miller, Ashokkumar B. Shenvi, Cyrus J. Ohnmacht, Jr., Chris A. Veale
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Patent number: 5589489Abstract: Compounds of formula I ##STR1## wherein Q.sup.1, Q.sup.2, Q.sup.3, and Q.sup.4 have any of the meanings given in the specification, their N-oxides, and their pharmaceutically acceptable salts are nonpeptide antagonists of neurokinin A and useful for the treatment of asthma, etc. Also disclosed are pharmaceutical compositions, processes for preparing the compounds of formula I and intermediates.Type: GrantFiled: December 12, 1994Date of Patent: December 31, 1996Assignee: Zeneca LimitedInventors: Ashokkumar B. Shenvi, Robert T. Jacobs, Scott C. Miller, Cyrus J. Ohnmacht, Jr., Chris A. Veale
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Patent number: 5521199Abstract: The present invention concerns the novel alkyl substituted heterocycles of formula I, set out below, wherein Q, Q.sup.1, Q.sup.2 and R have the values defined herein, which antagonize the pharmacological actions of one of the endogenous neuropeptide tachykinins at the neurokinin 2 (NK.sup.2) receptor making them useful whenever such antagonism is desired, such as in the treatment of asthma and related conditions. The invention also provides pharmaceutical compositions containing the alkyl substituted heterocycles for use in such treatment, methods for their use, and processes and novel intermediates for their manufacture.Type: GrantFiled: May 16, 1994Date of Patent: May 28, 1996Assignee: Zeneca LimitedInventors: Robert T. Jacobs, Ashokkumar B. Shenvi
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Patent number: 5250720Abstract: Intermediates for the preparation of Peptides comprising C-terminal boronic acid derivatives of lysine, ornithine, and arginine, homoarginine and corresponding isothiouronium analogs thereof, are reversible inhibitors of trypsin-like serine proteases such as thrombin, plasma kallikrein and plasmin.Type: GrantFiled: March 9, 1992Date of Patent: October 5, 1993Assignee: The Dupont Merck Pharmaceutical CompanyInventors: Charles A. Kettner, Ashokkumar B. Shenvi
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Patent number: 5242904Abstract: Peptides comprising C-terminal boronic acid derivatives of lysine, ornithine, and arginine, homoarginine and corresponding isothiouronium analogs thereof, are reversible inhibitors of trypsin-like serine proteases such as thrombin, plasma kallikrein and plasmin.Type: GrantFiled: March 9, 1992Date of Patent: September 7, 1993Assignee: The Dupont Merck Pharmaceutical CompanyInventors: Charles A. Kettner, Ashokkumar B. Shenvi
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Patent number: 5187157Abstract: Peptides comprising C-terminal boronic acid derivatives of lysine, ornithine, and arginine, homoarginine and corresponding isothiouronium analogs thereof, are reversible inhibitors of trypsin-like serine proteases such as thrombin, plasma kallikrein and plasmin.Type: GrantFiled: April 6, 1988Date of Patent: February 16, 1993Assignee: Du Pont Merck Pharmaceutical CompanyInventors: Charles A. Kettner, Ashokkumar B. Shenvi
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Patent number: 4692528Abstract: Process for preparing analgesic and narcotic antagonistic isoquinolines comprising:(a) contacting and reacting a lithiated anisole or alkyl phenyl ether, optionally substituted at the 3-position to the lithium atom, with a 4-piperidone to yield a 4-aryl-4-piperidinol;(b) dehydrating the piperidinol to a 4-aryl-1,2,3,6-tetrahydropyridine;(c) metalating and acylating the 1,2,3,6-tetrahydropyridine to yield a 1-(4-aryl-1,2,3,4-tetrahydropyrid-4-yl)-4-hydroxy-1-butanone;(d) reducing the ketone moiety of the butanone to yield a 5-aryl-7-oxa-2-azabicyclo[3.2.1]-octane-6-propanol;(e) converting the alcohol moiety of the propanol to L to yield a 5-aryl-6-[3-(L)propyl]-7-oxa-2-azabicyclo[3.2.1]octane in which L is a leaving group selected from the group consisting of --Cl, --Br, --I, p-MeC.sub.6 H.sub.4 SO.sub.3 and MeSO.sub.3 --.Type: GrantFiled: June 11, 1985Date of Patent: September 8, 1987Assignee: E. I. Du Pont De Nemours and CompanyInventor: Ashokkumar B. Shenvi
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Patent number: 4579952Abstract: Process for preparing analgesic and narcotic antagonistic isoquinolines comprising:(a) contacting and reacting a lithiated anisole or alkyl phenyl ether, optionally substituted at the 3-position to the lithium atom, with a 4-piperidone to yield a 4-aryl-4-piperidinol;(b) dehydrating the piperidinol to a 4-aryl-1,2,3,6-tetrahydropyridine;(c) metalating and acylating the 1,2,3,6-tetrahydropyridine to yield a 1-(4-aryl-1,2,3,4-tetrahydropyrid-4-yl)-4-hydroxy-1-butanone;(d) reducing the ketone moiety of the butanone to yield a 5-aryl-7-oxa-2-azabicyclo[3.2.1]octane-6-propanol;(e) converting the alcohol moiety of the propanol to L to yield a 5-aryl-6-[3-(L)propyl]-7-oxa-2-azabicyclo[3.2.1]octane in which L is a leaving group selected from the group consisting of --Cl, --Br, --I, p-MeC.sub.6 H.sub.4 SO.sub.3 -- and MeSO.sub.3 --.Type: GrantFiled: July 25, 1983Date of Patent: April 1, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventors: Engelbert Ciganek, Ashokkumar B. Shenvi
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Patent number: 4537963Abstract: Process for preparing analgesic and narcotic antagonistic isoquinolines comprising:(a) contacting and reacting a lithiated anisole or alkyl phenyl ether, optionally substituted at the 3-position to the lithium atom, with a 4-piperidone to yield a 4-aryl-4-piperidinol;(b) dehydrating the piperidinol to a 4-aryl-1,2,3,6-tetrahydropyridine;(c) metalating and acylating the 1,2,3,6-tetrahydropyridine to yield a 1-(4-aryl-1,2,3,4-tetrahydropyrid-4-yl)-4-hydroxy-1-butanone;(d) reducing the ketone moiety of the butanone to yield a 5-aryl-7-oxa-2-azabicyclo[3,2.1]-octane-6-propanol;(e) converting the alcohol moiety of the propanol to L to yield a 5-aryl-6-[3-(L)propyl]-7-oxa-2-azabicyclo[3.3.1]octane in which L is a leaving group selected from the group consisting of --Cl, --Br, --I, p--MeC.sub.6 H.sub.4 SO.sub.3 -- and MeSO.sub.3 --.Type: GrantFiled: August 11, 1983Date of Patent: August 27, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ashokkumar B. Shenvi
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Patent number: 4537773Abstract: .alpha.-Aminoboronic acids and derivatives of formula ##STR1## are potent, reversible inhibitors of aminopeptidases.Type: GrantFiled: December 5, 1983Date of Patent: August 27, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ashokkumar B. Shenvi
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Patent number: 4499082Abstract: Peptides comprising C-terminal .alpha.-aminoboronic acid residues are potent, reversible inhibitors of proteolytic enzymes.Type: GrantFiled: December 5, 1983Date of Patent: February 12, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventors: Ashokkumar B. Shenvi, Charles A. Kettner
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Patent number: 4421916Abstract: Process for preparing analgesic and narcotic antagonistic isoquinolines comprising:(a) contacting and reacting a lithiated anisole or alkyl phenyl ether, optionally substituted at the 3-position to the lithium atom, with a 4-piperidone to yield a 4-aryl-4-piperidinol;(b) dehydrating the piperidinol to a 4-aryl-1,2,3,6-tetrahydropyridine;(c) metalating and acylating the 1,2,3,6-tetrahydropyridine to yield a 1-(4-aryl-1,2,3,4-tetrahydropyrid-4-yl)-4-hydroxy-1-butanone;(d) reducing the ketone moiety of the butanone to yield a 5-aryl-7-oxa-2-azabicyclo[3.2.1]-octane-6-propanol;(e) converting the alcohol moiety of the propanol to L to yield a 5-aryl-6-[3-(L)propyl-7-oxa-2-azabicyclo[3.2.1]octane in which L is a leaving group selected from the group consisting of --Cl, --Br, --I, p-MeC.sub.6 H.sub.4 SO.sub.3 -- and MeSO.sub.3 --.Type: GrantFiled: December 28, 1981Date of Patent: December 20, 1983Assignee: E. I. Du Pont de Nemours & Co.Inventor: Ashokkumar B. Shenvi
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Patent number: 4415736Abstract: Process for preparing analgesic and narcotic antagonistic isoquinolines comprising:(a) contacting and reacting a lithiated anisole or alkyl phenyl ether, optionally substituted at the 3-position to the lithium atom, with a 4-piperidone to yield a 4-aryl-4-piperidinol;(b) dehydrating the piperidinol to a 4-aryl-1,2,3,6-tetrahydropyridine;(c) metalating and acylating the 1,2,3,6-tetrahydropyridine to yield a 1-(4-aryl-1,2,3,4-tetrahydropyrid-4-yl)-4-hydroxy-1-butanone;(d) reducing the ketone moiety of the butanone to yield a 5-aryl-7-oxa-2-azabicyclo[3.2.1]-octane-6-propanol;(e) converting the alcohol moiety of the propanol to L to yield a 5-aryl-6-[3-(L)propyl]-7-oxa-2-azabicyclo[3.2.1]octane in which L is a leaving group selected from the group consisting of -Cl, -Br, -I, p-MeC.sub.6 H.sub.4 SO.sub.3 - and MeSO.sub.3 -.Type: GrantFiled: December 28, 1981Date of Patent: November 15, 1983Assignee: E. I. Du Pont de Nemours & Co.Inventors: Engelbert Ciganek, Ashokkumar B. Shenvi