Patents by Inventor Megh Singh

Megh Singh 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).

  • Publication number: 20220117968
    Abstract: The present disclosure provides compounds, methods, and compositions which may be used to treat tuberculosis. In some embodiments, these compounds and compositions have a bactericidal property against Mycobacterium tuberculosis (Mtb). Methods of employing such agents are also provided.
    Type: Application
    Filed: July 17, 2018
    Publication date: April 21, 2022
    Inventors: Marvin J. MEYERS, Megh SINGH, Christina L. STALLINGS, Leslie A. WEISS, Scott WILDMAN, Stacy D. ARNETT
  • Publication number: 20040209897
    Abstract: Compounds are described which inhibit mitogen activated protein kinase-activated protein kinase-2 (MK-2). Methods of using such compounds for the inhibition of MK-2, and for the prevention or treatment of a disease or disorder that is mediated by TNF&agr;, are described, where the method involves administering to the subject an MK-2 inhibiting compound of the present invention. Therapeutic compositions, pharmaceutical compositions and kits which contain the present MK-2 inhibiting compounds are also described.
    Type: Application
    Filed: December 19, 2003
    Publication date: October 21, 2004
    Applicant: Pharmacia Corporation
    Inventors: William F. Vernier, David R. Anderson, Dennis P. Phillion, Marvin J. Meyers, Shridhar G. Hegde, David B. Reitz, Ingrid P. Buchler, Matthew W. Mahoney, Thomas E. Rogers, Gennadiy Poda, Megh Singh, Kun K. Wu, Jin Xie
  • Publication number: 20040014984
    Abstract: Novel processes and intermediates are provided for the synthesis of derivatives of 4-amino-3-hydroxypyrrole-2-carboxylic acids that are useful as monomers for polyamides capable of binding dsDNA. According to one preferred reaction scheme, an alkyl alkoxymethylene nitroacetate (Formula VIII) is prepared by reaction of a trialkyl orthoformate or orthoacetate with a nitroacetate ester in the presence of a carboxylic anhydride. The compound of Formula VIII is condensed with an N-substituted glycine to yield an N-substituted (2-nitro-2-alkoxycarbonyl)vinyl glycinate ester (Formula VII). Ring closure in the presence of an alkali metal alkoxide yields a 4-nitro-3-hydroxypyrrole-2-carboxylic ester (Formula V). After blocking of the 3-hydroxy group to produce a further intermediate (Formula IV), the 4-nitro group is reduced to a 4-amino group (Formula III), and the 4-amino group is then blocked by reaction with a dicarbonate diester to produce the fully blocked intermediate (Formula II).
    Type: Application
    Filed: May 9, 2003
    Publication date: January 22, 2004
    Inventors: Dennis P Phillion, Megh Singh
  • Patent number: 6632950
    Abstract: Novel processes and intermediates are provided for the synthesis of derivatives of 4-amino-3-hydroxypyrrole-2-carboxylic acids that are useful as monomers for polyamides capable of binding dsDNA. According to one preferred reaction scheme, an alkyl alkoxymethylene nitroacetate (Formula VIII) is prepared by reaction of a trialkyl orthoformate or orthoacetate with a nitroacetate ester in the presence of a carboxylic anhydride. The compound of Formula VIII is condensed with an N-substituted glycine to yield an N-substituted (2-nitro-2-alkoxycarbonyl)vinyl glycinate ester (Formula VII). Ring closure in the presence of an alkali metal alkoxide yields a 4-nitro-3-hydroxypyrrole-2-carboxylic ester (Formula V). After blocking of the 3-hydroxy group to produce a further intermediate (Formula IV), the 4-nitro group is reduced to a 4-amino group (Formula III), and the 4-amino group is then blocked by reaction with a dicarbonate diester to produce the fully blocked intermediate (Formula II).
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: October 14, 2003
    Assignee: Pharmacia Corporation
    Inventors: Dennis P. Phillion, Megh Singh
  • Publication number: 20020042522
    Abstract: Novel processes and intermediates are provided for the synthesis of derivatives of 4-amino-3-hydroxypyrrole-2-carboxylic acids that are useful as monomers for polyamides capable of binding dsDNA. According to one preferred reaction scheme, an alkyl alkoxymethylene nitroacetate (Formula VIII) is prepared by reaction of a trialkyl orthoformate or orthoacetate with a nitroacetate ester in the presence of a carboxylic anhydride. The compound of Formula VIII is condensed with an N-substituted glycine to yield an N-substituted (2-nitro-2-alkoxycarbonyl)vinyl glycinate ester (Formula VII). Ring closure in the presence of an alkali metal alkoxide yields a 4-nitro-3-hydroxypyrrole-2-carboxylic ester (Formula V). After blocking of the 3-hydroxy group to produce a further intermediate (Formula IV), the 4-nitro group is reduced to a 4-amino group (Formula III), and the 4-amino group is then blocked by reaction with a dicarbonate diester to produce the fully blocked intermediate (Formula II).
    Type: Application
    Filed: July 5, 2001
    Publication date: April 11, 2002
    Inventors: Dennis P. Phillion, Megh Singh
  • Patent number: 5087752
    Abstract: The subject invention relates to a method of synthesizing nitroxides from secondary amines. This method uses a suitable dioxirane compound such as dimethyldioxirane (DMD), which is relatively stable and simple to synthesize, as the oxidizing agent. A quantity of a secondary amine having no hydrogen atoms directly attached to the alpha carbon atoms is mixed with a 2x molar ratio of the dioxirane. In a first reaction, the secondary amine is oxidized to form a hydroxylamine; in a second reaction, the hydroxylamine is further oxidized to form a nitroxide. When the dioxirane loses an oxygen atom it converts into a ketone; for example, dimethyldioxirane is converted into acetone. This is very convenient, since the ketone byproduct is a solvent that can be easily removed after the reaction without causing interfering reactions. This method provides a simple, highly selective, rapid reaction with very high yields.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: February 11, 1992
    Assignee: Curators of the University of Missouri
    Inventors: Robert W. Murray, Megh Singh
  • Patent number: 5001233
    Abstract: The subject invention relates to a method of synthesizing hydroxylamines from secondary amines. This method uses a dioxirane compound such as dimethyldioxirane (DMD, which is relatively stable and simple to synthesize), as the oxidizing agent. The reaction proceeds as follows: ##STR1## This method provides a simple, one-step reaction with high yields. It can be performed in acetone solution, and the transferral of an oxygen atom from dimethyldioxirane to the secondary amine converts the dioxirane into acetone, the solvent, permitting simple workup and purification. This method can be used with a wide variety of secondary amines, including aliphatic, aromatic, cyclic, and heterocyclic secondary amines, to create a corresponding variety of hydroxylamines.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: March 19, 1991
    Assignee: The Curators of the University of Missouri
    Inventors: Robert W. Murray, Megh Singh