Patents by Inventor Fenmei Yao

Fenmei Yao 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: 6927036
    Abstract: Disclosed is a method for synthesizing 1-(acyloxy)-alkyl derivatives of primary or secondary amine drugs from 1-acyl-alkyl derivatives of primary or secondary amine drugs, which typically proceeds stereospecifically, in high yield, does not require the use of activated intermediates and/or toxic compounds and is readily amenable to scale-up. For example, 1-acyl-alkyl derivatives of gabapentin and pregabalin are oxidized to yield 1-(acyloxy)-alkyl derivatives of gabapentin and pregabalin, respectively.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: August 9, 2005
    Assignee: Xero Port, Inc.
    Inventors: Mark A. Gallop, Jia-Ning Xiang, Fenmei Yao, Laxminarayan Bhat, Cindy X. Zhou
  • Publication number: 20050107334
    Abstract: The disclosures herein relate generally to acyloxyalkyl carbamate prodrugs of (±)-4-amino-3-(4-chlorophenyl)butanoic acid and analogs thereof, pharmaceutical compositions thereof, methods of making prodrugs of (±)-4-amino-3-(4-chlorophenyl)butanoic acid and analogs thereof, methods of using prodrugs of (±)-4-amino-3-(4-chlorophenyl)butanoic acid and analogs thereof, and pharmaceutical compositions thereof for treating or preventing common diseases and/or disorders such as spasticity and/or acid reflux disease. The disclosures herein also relate to acyloxyalkyl carbamate prodrugs of (±)-4-amino-3-(4-chlorophenyl)butanoic acid and analogs thereof which are suitable for oral administration and to sustained release oral dosage forms thereof.
    Type: Application
    Filed: August 20, 2004
    Publication date: May 19, 2005
    Inventors: Mark Gallop, Fenmei Yao, Maria Ludwikow, Thu Phan, Ge Peng
  • Patent number: 6818787
    Abstract: The present invention provides prodrugs of GABA analogs, pharmaceutical compositions of prodrugs of GABA analogs and methods for making prodrugs of GABA analogs. The present invention also provides methods for using prodrugs of GABA analogs and methods for using pharmaceutical compositions of prodrugs of GABA analogs for treating or preventing common diseases and/or disorders.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: November 16, 2004
    Assignee: Xenoport, Inc.
    Inventors: Mark A. Gallop, Kenneth C. Cundy, Cindy X. Zhou, Fenmei Yao, Jia-Ning Xiang
  • Publication number: 20040077553
    Abstract: The present invention provides prodrugs of GABA analogs, pharmaceutical compositions of prodrugs of GABA analogs and methods for making prodrugs of GABA analogs. The present invention also provides methods for using prodrugs of GABA analogs and methods for using pharmaceutical compositions of prodrugs of GABA analogs for treating or preventing common diseases and/or disorders.
    Type: Application
    Filed: December 6, 2002
    Publication date: April 22, 2004
    Inventors: Mark A. Gallop, Kenneth C. Cundy, Cindy X. Zhou, Fayang G. Qiu, Fenmei Yao, Jia-Ning Xiang, Ian R. Ollmann
  • Publication number: 20040014940
    Abstract: The synthesis of 1-(acyloxy)-alkyl carbamates of GABA analogs from 1-haloalkyl carbamates of GABA analogs are described. Also described are new 1-haloalkyl carbamates of GABA analogs.
    Type: Application
    Filed: June 11, 2003
    Publication date: January 22, 2004
    Inventors: Stephen P. Raillard, Cindy X. Zhou, Fenmei Yao, Suresh Kumar Manthati, Jia-Ning Xiang, Mark A. Gallop
  • Publication number: 20040006132
    Abstract: The present invention provides prodrugs of GABA analogs, pharmaceutical compositions of prodrugs of GABA analogs and methods for making prodrugs of GABA analogs. The present invention also provides methods for using prodrugs of GABA analogs and methods for using pharmaceutical compositions of prodrugs of GABA analogs for treating or preventing common diseases and/or disorders.
    Type: Application
    Filed: June 10, 2003
    Publication date: January 8, 2004
    Inventors: Mark A. Gallop, Kenneth C. Cundy, Cindy X. Zhou, Fayang G. Qiu, Fenmei Yao, Jia-Ning Xiang, Ian R. Ollman
  • Publication number: 20030236200
    Abstract: The present invention provides cyclic 1-(acyloxy)-alkyl prodrugs of GABA analogs, methods of making cyclic 1-(acyloxy)-alkyl prodrugs of GABA analogs and compositions of cyclic 1-(acyloxy)-alkyl prodrugs of GABA analogs. The present invention also provides methods of using cyclic 1-(acyloxy)-alkyl prodrugs of GABA analogs and compositions of cyclic 1-(acyloxy)-alkyl prodrugs of GABA analogs.
    Type: Application
    Filed: March 20, 2003
    Publication date: December 25, 2003
    Inventors: Mark A. Gallop, Jia-Ning Xiang, Fenmei Yao, Laxminarayan Bhat
  • Publication number: 20030176398
    Abstract: The present invention provides prodrugs of GABA analogs, pharmaceutical compositions of prodrugs of GABA analogs and methods for making prodrugs of GABA analogs. The present invention also provides methods for using prodrugs of GABA analogs and methods for using pharmaceutical compositions of prodrugs of GABA analogs for treating or preventing common diseases and/or disorders.
    Type: Application
    Filed: June 11, 2002
    Publication date: September 18, 2003
    Inventors: Mark A. Gallop, Kenneth C. Cundy, Cindy X. Zhou, Fayang G. Qiu, Fenmei Yao, Jia-Ning Xiang, Ian R. Ollmann
  • Publication number: 20030171303
    Abstract: The present invention provides a method for synthesizing 1-(acyloxy)-alkyl derivatives from 1-acyl-alkyl derivatives, which typically proceeds stereospecifically, in high yield, does not require the use of activated intermediates and/or toxic compounds and is readily amenable to scale-up. The current invention also provides 1-acyl-alkyl derivatives of known drug compounds and methods for synthesizing these 1-acyl-alkyl derivatives.
    Type: Application
    Filed: June 11, 2002
    Publication date: September 11, 2003
    Inventors: Mark A. Gallop, Jia-Ning Xiang, Fenmei Yao, Laxminarayan Bhat, Cindy X. Zhou