Patents by Inventor Subramanian Sam Guhan

Subramanian Sam Guhan 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: 20110097315
    Abstract: This invention relates to the enantiomers of 6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-43-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one, prodrugs thereof, and pharmaceutically acceptable salts and solvates of said compounds and said prodrugs, that are useful in the treatment of hyperproliferative diseases, such as cancers, in mammals. The invention also relates to processes for the production of enantiomerically pure or optically enriched (+)- or (?)-6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one enantiomers from a mixture containing two enantiomers using continuous chromatography. The invention further relates to the L-(+)-tartaric acid or (S)-(?)-1,1?-binapthyl-2,2?-diyl hydrogenphosphate salts of (+)-6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one.
    Type: Application
    Filed: February 12, 2007
    Publication date: April 28, 2011
    Inventors: R. Mark Guinn, Subramanian Sam Guhan, Karl K. Ng, Derek L. Tickner, Marcus Douglas Ewing, Clifford N. Meltz, Bryan Li, Kees Pouwer
  • Patent number: 7176315
    Abstract: This invention relates to the enantiomers of 6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one, prodrugs thereof, and pharmaceutically acceptable salts and solvates of said compounds and said prodrugs, that are useful in the treatment of hyperproliferative diseases, such as cancers, in mammals. The invention also relates to processes for the production of enantiomerically pure or optically enriched (+)- or (?)-6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one enantiomers from a mixture containing two enantiomers using continuous chromatography. The invention further relates to the L-(+)-tartaric acid or (S)-(?)-1,1?-binapthyl-2,2?-diyl hydrogenphosphate salts of (+)-6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: February 13, 2007
    Assignee: Pfizer Inc
    Inventors: R. Mark Guinn, Subramanian Sam Guhan, Karl K Ng, Derek L. Tickner, Marcus Douglas Ewing, Clifford N. Meltz, Bryan Li, Kees Pouwer
  • Publication number: 20040192727
    Abstract: This invention relates to the enantiomers of 6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one, prodrugs thereof, and pharmaceutically acceptable salts and solvates of said compounds and said prodrugs, that are useful in the treatment of hyperproliferative diseases, such as cancers, in mammals. The invention also relates to processes for the production of enantiomerically pure or optically enriched (+)- or (−)-6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one enantiomers from a mixture containing two enantiomers using continuous chromatography.
    Type: Application
    Filed: April 14, 2004
    Publication date: September 30, 2004
    Applicant: Pfizer Inc.
    Inventors: R. Mark Guinn, Subramanian Sam Guhan, Karl K. Ng, Derek L. Tickner, Marcus Douglas Ewing, Clifford N. Meltz, Bryan Li, Kees Pouwer
  • Patent number: 6740757
    Abstract: This invention relates to the enantiomers of 6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one, prodrugs thereof, and pharmaceutically acceptable salts and solvates of said compounds and said prodrugs, that are useful in the treatment of hyperproliferative diseases, such as cancers, in mammals. The invention also relates to processes for the production of enantiomerically pure or optically enriched (+)- or (−)-6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-1-methyl-1H-quinolin-2-one enantiomers from a mixture containing two enantiomers using continuous chromatography.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: May 25, 2004
    Assignee: Pfizer Inc
    Inventors: R. Mark Guinn, Subramanian Sam Guhan, Karl K Ng, Derek L. Tickner, Marcus Douglas Ewing, Clifford N. Meltz, Bryan Li, Kees Pouwer
  • Publication number: 20030114487
    Abstract: This invention relates to the enantiomers of 6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-y)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl) -phenyl]-1-methyl-1H-quinolin-2-one, prodrugs thereof, and pharmaceutically acceptable salts and solvates of said compounds and said prodrugs, that are useful in the treatment of hyperproliferative diseases, such as cancers, in mammals. The invention also relates to processes for the production of enantiomerically pure or optically enriched (+)- or (−)-6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-[3-(3-hydroxy-3-methyl-but-1-ynyl )-phenyl]-1 -methyl-1H-quinol in-2-one enantiomers from a mixture containing two enantiomers using continuous chromatography.
    Type: Application
    Filed: August 27, 2002
    Publication date: June 19, 2003
    Applicant: Pfizer Inc.
    Inventors: R. Mark Guinn, Subramanian Sam Guhan, Karl K. Ng, Derek L. Tickner, Marcus Douglas Ewing, Clifford N. Meltz, Bryan Li, Kees Pouwer
  • Patent number: 6313100
    Abstract: This invention relates to compounds of the formula and to pharmaceutically acceptable salts, prodrugs and solvates thereof, wherein R1 and R2 are as defined herein. The compounds of formula 1 are antibacterial and antiprotozoal agents that may be used to treat various bacterial and protozoal infections and disorders related to such infections. The invention also relates to pharmaceutical compositions containing the compounds of formula 1 and to methods of treating bacterial and protozoal infections by administering the compounds of formula 1.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: November 6, 2001
    Assignee: Pfizer Inc
    Inventors: Katherine Elizabeth Brighty, Subramanian Sam Guhan, Martin Raymond Jefson, Robert Gerald Linde, III, Ellen Lester McCormick
  • Patent number: 6194429
    Abstract: The present invention relates to alatrofloxacin mesylate substantially free of less polar impurities, to parenteral compositions of alatrofloxacin mesylate and to processes for purifying alatrofloxacin mesylate.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: February 27, 2001
    Assignee: Pfizer Inc
    Inventors: Robert Mark Guinn, John Francis Lambert, Subramanian Sam Guhan, Stanley Walter Walinsky