Patents by Inventor Robert Seemayer

Robert Seemayer 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: 9085601
    Abstract: Disclosed is a synthesis suitable for large scale manufacture of an A2A-adenosine receptor agonist, and also relates to polymorphs of that compound, and to methods of isolating a specific polymorph.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: July 21, 2015
    Assignee: Gilead Sciences, Inc.
    Inventors: Jeff Zablocki, Elfatih Elzein, Robert Seemayer, Travis Lemons
  • Publication number: 20140213539
    Abstract: Disclosed is a synthesis suitable for large scale manufacture of an A2A-adenosine receptor agonist, and also relates to polymorphs of that compound, and to methods of isolating a specific polymorph.
    Type: Application
    Filed: August 19, 2013
    Publication date: July 31, 2014
    Applicant: Gilead Sciences, Inc.
    Inventors: Jeff Zablocki, Elfatih Elzein, Robert Seemayer, Travis Lemons
  • Patent number: 8524883
    Abstract: Disclosed is a synthesis suitable for large scale manufacture of an A2A-adenosine receptor agonist, namely, (1-{9-[(4S,2R,3R,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-6-aminopurin-2-yl}pyrazol-4-yl)-N-methylcarboxamide. Also, disclosed are polymorphs of this compound and methods for isolating a specific polymorph. Also, disclosed are pharmaceutical compositions and methods for preparing pharmaceutical compositions.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: September 3, 2013
    Assignee: Gilead Sciences, Inc.
    Inventors: Jeff Zablocki, Elfatih Elzein, Robert Seemayer, Travis Lemons
  • Publication number: 20110039799
    Abstract: Provided are polymorphs of an A1 adenosine receptor partial agonist, compositions thereof, methods for their preparation, and methods for their uses.
    Type: Application
    Filed: August 10, 2010
    Publication date: February 17, 2011
    Applicant: Gilead Palo Alto, Inc.
    Inventors: Ernest Anthony Carra, Benjamin R. Graetz, DeMei Leung, Janaki Nyshadham, Robert Seemayer, Simon Kwok-Pan Yau
  • Patent number: 6911544
    Abstract: The present invention is directed to a process for preparing (S,S)-cis-2-phenyl-3-aminopiperidine and (S,S)-cis-2-phenyl-3-tertbutoxycarbonylaminopiperidine.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: June 28, 2005
    Assignees: Pfizer Inc., DSM Pharmaceuticals, Inc.
    Inventors: Robert Seemayer, Thomas C. Nugent, Jack Liang
  • Publication number: 20050085641
    Abstract: A process for preparing (S,S)-cis-2-benzhydryl-3-benzylaminoquinuclidine. The process includes the steps of contacting a compound containing a mixture of R- and S-isomers and having the formula with an effective amount of a chiral organic acid in the presence of an organic solvent and an effective amount of an organic carboxylic acid for converting the R-isomer into an acid salt of the S isomer, wherein the organic solvent is capable of solubilizing the compound containing the mixture of R- and S-isomers, while precipitating the acid salt and the organic carboxylic acid is different from the chiral organic acid; neutralizing the acid salt with a base to provide an S-isomer-of a chiral ketone of the formula reacting the chiral ketone with an organic amine in the presence of a Lewis acid to provide the corresponding imine and reducing the imine.
    Type: Application
    Filed: October 27, 2004
    Publication date: April 21, 2005
    Inventors: Robert Seemayer, Thomas Nugent
  • Patent number: 6861526
    Abstract: A process for preparing (S,S)-cis-2-benzhydryl-3-benzylaminoquinuclidine. The process includes the steps of contacting a compound containing a mixture of R- and S-isomers and having the formula with an effective amount of a chiral organic acid in the presence of an organic solvent and an effective amount of an organic carboxylic acid for converting the R-isomer into an acid salt of the S isomer, wherein the organic solvent is capable of solubilizing the compound containing the mixture of R- and S-isomers, while precipitating the acid salt and the organic carboxylic acid is different from the chiral organic acid; neutralizing the acid salt with a base to provide an S-isomer of a chiral ketone of the formula ; and reacting the chiral ketone with an organic amine in the presence of a Lewis acid to provide the corresponding imine and reducing the imine.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: March 1, 2005
    Assignees: Pfizer Inc., DSM Pharmaceuticals, Inc.
    Inventors: Robert Seemayer, Thomas C. Nugent
  • Publication number: 20040116704
    Abstract: A process for preparing (S,S)-cis-2-benzhydryl-3-benzylaminoquinuclidine.
    Type: Application
    Filed: October 6, 2003
    Publication date: June 17, 2004
    Applicants: PFIZER INC., DSM PHARMACEUTICALS, INC.
    Inventors: Robert Seemayer, Thomas C. Nugent
  • Publication number: 20040110953
    Abstract: The present invention is directed to a process for preparing (S,S)-cis-2-phenyl-3-aminopiperidine and (S,S)-cis-2-phenyl-3-tertbutoxycarbonylaminopiperidine.
    Type: Application
    Filed: October 9, 2003
    Publication date: June 10, 2004
    Applicants: PFIZER INC., DSM PHARMACEUTICALS, INC.
    Inventors: Robert Seemayer, Thomas C. Nugent, Jack Liang
  • Patent number: 6734313
    Abstract: Ortho esters and ortho carbonates can be produced by alkylating esters and carbonates with, for example, the hexafluorophosphate salt of a trialkyl oxonium ion. The spiro species are useful intermediates in the synthesis of complex organic molecules. Synthetic pathways for the production of medically active compounds incorporates spiro ortho esters. Anti-first-pass effect materials are produced in high yield utilizing a synthetic strategy incorporating cyclic ortho ester intermediates.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: May 11, 2004
    Assignee: Bioavailability Systems, LLC
    Inventors: Robert Seemayer, Jack Liang
  • Publication number: 20040002611
    Abstract: Ortho esters and ortho carbonates can be produced by alkylating esters and carbonates with, for example, the hexafluorophosphate salt of a trialkyl oxonium ion. The spiro species are useful intermediates in the synthesis of complex organic molecules. Synthetic pathways for the production of medically active compounds incorporates spiro ortho esters. Anti-first-pass effect materials are produced in high yield utilizing a synthetic strategy incorporating cyclic ortho ester intermediates.
    Type: Application
    Filed: May 9, 2003
    Publication date: January 1, 2004
    Applicant: BIOAVAILABILITY SYSTEMS, LLC
    Inventors: Robert Seemayer, Jack Liang
  • Patent number: 6613918
    Abstract: Ortho esters and ortho carbonates can be produced by alkylating esters and carbonates with, for example, the hexafluorophosphate salt of a trialkyl oxonium ion. The spiro species are useful intermediates in the synthesis of complex organic molecules. Synthetic pathways for the production of medically active compounds incorporates spiro ortho esters. Anti-first-pass effect materials are produced in high yield utilizing a synthetic strategy incorporating cyclic ortho ester intermediates.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: September 2, 2003
    Assignee: Bioavailability Systems, LLC
    Inventors: Robert Seemayer, Jack Liang
  • Patent number: 6600062
    Abstract: The present invention provides a method for enantioselectively producing a nonracemic 6,7-dihydroxy geranyloxy compound from a geranyloxy compound. In particular, methods of the present invention involve enantioselectively epoxidizing the geranyloxy compound and hydrolyzing the epoxide moiety under conditions sufficient to produce the nonracemic 6,7-dihydroxy geranyloxy compound.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: July 29, 2003
    Assignees: DSM Catalytica Pharmaceuticals, Inc., Colorado State University Research Foundation
    Inventors: Robert Seemayer, Yian Shi
  • Publication number: 20020095061
    Abstract: The present invention provides a method for enantioselectively producing a nonracemic 6,7-dihydroxy geranyloxy compound from a geranyloxy compound. In particular, methods of the present invention involve enantioselectively epoxidizing the geranyloxy compound and hydrolyzing the epoxide moiety under conditions sufficient to produce the nonracemic 6,7-dihydroxy geranyloxy compound.
    Type: Application
    Filed: December 20, 2001
    Publication date: July 18, 2002
    Applicant: DSM CATALYTICA PHARMACEUTICALS, INC.
    Inventors: Robert Seemayer, Yian Shi
  • Patent number: 5962743
    Abstract: This invention provides a process for preparing acylaromatics comprising reacting an aromatic compound with a carboxylic acid in the presence of a reaction medium comprising polyphosphoric acid and a strong protic acid. In one embodiment, the invention provides a process for preparing a para-acyl phenoxyethylamine comprising the steps of reacting a 2-phenoxyethyl compound bearing a leaving group on the ethyl 1-position with a carboxylic acid in the presence of a reaction medium comprising polyphosphoric acid and a strong protic acid, to form apara-acyl phenoxyethyl intermediate bearing the leaving group; and reacting the para-acyl phenoxyethyl intermediate with an amine that substitutes for the leaving group to form the para-acyl phenoxyethylamine.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: October 5, 1999
    Assignee: Catalytica Pharmaceuticals, Inc.
    Inventors: John Myron Gruber, Robert Seemayer
  • Patent number: 5614643
    Abstract: Process for the enzymatic production of isomerically pure compounds having the general formulae I and II ##STR1## in which the substituents R have the meanings stated in the claims, as well as their use for the production of isomerically pure isosorbide-2-nitrate having the formula V and isosorbide-5-nitrate having the formula VI, ##STR2## which are both important as therapeutic agents for coronary diseases.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 25, 1997
    Assignee: Boehringer Mannheim GmbH
    Inventors: Manfred Schneider, Robert Seemayer
  • Patent number: 5538891
    Abstract: Process for the enzymatic production of isomerically pure compounds having the general formulae I and II ##STR1## in which the substituents R have the meanings stated in the claims, as well as their use for the production of isomerically pure isosorbide-2-nitrate having the formula V and isosorbide-5-nitrate having the formula VI, ##STR2## which are both important as therapeutic agents for coronary diseases.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: July 23, 1996
    Assignee: Boehringer Mannheim GmbH
    Inventors: Manfred Schneider, Robert Seemayer
  • Patent number: 5476965
    Abstract: Provided are enzymatic methods for the selective hydrolytic resolution of certain enantiomers of a pharmaceutical compound, the pharmaceutical compound comprising a (.+-.) mixture of a .alpha.-substituted 2-methyl proprionic acid derivative. Specifically provided is the selective enzymatic resolution of either the R(+) or S(-) enantiomer of (.+-.)-ethyl ciprofibrate. Also provided are substantially pure enantiomers of R(+) and S(-) ciprofibrate.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: December 19, 1995
    Assignee: Genencor International, Inc.
    Inventors: Matthew W. Chase, Charles T. Goodhue, Robert Seemayer, Gregory M. Whited
  • Patent number: 5418151
    Abstract: There is provided a regio-selective method for the resolution of carbohydrate monoester mixtures, by treating such mixtures with one or more selective enzymes. The resolution of such mixtures results in monoesters comprising significantly purer isolates of one desired isomer.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: May 23, 1995
    Assignee: Genencor International, Inc.
    Inventors: Charles T. Goodhue, Theresa C. Paulson, Robert Seemayer
  • Patent number: RE47301
    Abstract: Disclosed is a synthesis suitable for large scale manufacture of an A2A-adenosine receptor agonist, and also relates to polymorphs of that compound, and to methods of isolating a specific polymorph.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: March 19, 2019
    Assignee: Gilead Sciences, Inc.
    Inventors: Jeff Zablocki, Elfatih Elzein, Robert Seemayer, Travis Lemons