Patents by Inventor Brijnath P. Chaurasia

Brijnath P. Chaurasia 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).

  • Novel asymmetric synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid
    Publication number: 20090069593
    Abstract: The invention encompasses processes for the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, and intermediates of (S)-Pregabalin.
    Type: Application
    Filed: October 28, 2008
    Publication date: March 12, 2009
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, V. Govardhan Rao, Anand Prakash Tiwari
  • Novel asymmetric synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid
    Publication number: 20090069578
    Abstract: The invention encompasses processes for the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, and intermediates of (S)-Pregabalin.
    Type: Application
    Filed: October 28, 2008
    Publication date: March 12, 2009
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, V. Govardhan Rao, Anand Prakash Tiwari
  • Novel asymmetric synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid
    Publication number: 20090069600
    Abstract: The invention encompasses processes for the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, and intermediates of (S)-Pregabalin.
    Type: Application
    Filed: October 28, 2008
    Publication date: March 12, 2009
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, V. Govardhan Rao, Anand Prakash Tiwari
  • Novel asymmetric synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid
    Publication number: 20090069596
    Abstract: The invention encompasses processes for the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, and intermediates of (S)-Pregabalin.
    Type: Application
    Filed: November 4, 2008
    Publication date: March 12, 2009
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, V.Govardhan Rao, Anand Prakash Tiwari
  • Novel asymmetric synthesis of (S)-(+)-3-(Aminomethyl)-5-methylhexanoic acid
    Publication number: 20090062562
    Abstract: The invention encompasses processes for the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, and intermediates of (S)-Pregabalin.
    Type: Application
    Filed: October 28, 2008
    Publication date: March 5, 2009
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, V. Govardhan Rao, Anand Prakash Tiwari
  • Chiral 3-carbamoylmethyl-5-methyl hexanoic acids, key intermediates for the synthesis of (S)-Pregabalin
    Patent number: 7470812
    Abstract: The invention encompasses the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, via the intermediate, (3R)-5-methyl-3-(2-oxo-2{[(1R)-1-phenylethyl]amino}ethyl)hexanoic acid.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: December 30, 2008
    Assignee: Teva Pharmaceutical Industries Ltd.
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, Anand Prakash Tiwari
  • Chiral 3-carbamoylmethyl-5-methyl hexanoic acids, key intermediates for the synthesis of (S)-pregabalin
    Patent number: 7465826
    Abstract: The invention encompasses the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, via the intermediate, (3R)-5-methyl-3-(2-oxo-2{[(1R)-1-phenylethyl]amino}ethyl)hexanoic acid.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: December 16, 2008
    Assignee: Teva Pharmaceutical Industries Ltd.
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, Anand Prakash Tiwari
  • Synthesis of (S)-(+)-3-(aminomethyl)-5-methyl hexanoic acid
    Publication number: 20080306292
    Abstract: Provided are syntheses of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin via a chiral intermediate of the following formula 4 wherein Ar is a C6-10 aromatic group, R is a straight or branched C1-4 alkyl, ester, or carboxylic acid, and R1 is a straight or branched C1-5 alkyl, aralkyl, or substituted aralkyl.
    Type: Application
    Filed: March 24, 2008
    Publication date: December 11, 2008
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, Anand Prakash Tiwari, Shivaji Haribhau Shelke
  • Asymmetric synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid
    Patent number: 7446220
    Abstract: The invention encompasses processes for the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, and intermediates of (S)-Pregabalin.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: November 4, 2008
    Assignee: Teva Pharmaceutical Industries Ltd.
    Inventors: Vinod Kumar Kansal, Brijnath P. Chaurasia, V. Govardhan Rao, Anand Prakash Tiwari