Patents by Inventor Brijnath Chaurasia

Brijnath 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).

  • Chiral 3-carbamoylmethyl-5-methyl hexanoic acids, key intermediates for the synthesis of (S)-Pregabalin
    Publication number: 20080051602
    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: Application
    Filed: August 21, 2007
    Publication date: February 28, 2008
    Inventors: Vinod Kansal, Brijnath Chaurasia, Anand Tiwari
  • Chiral 3-carbamoylmethyl-5-methyl hexanoic acids, key intermediates for the synthesis of (S)-pregabalin
    Publication number: 20080045747
    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: Application
    Filed: August 21, 2007
    Publication date: February 21, 2008
    Inventors: Vinod Kansal, Brijnath Chaurasia, Anand Tiwari
  • Processes for the synthesis of 3-isobutylglutaric acid
    Publication number: 20070259917
    Abstract: Provided are processes for the synthesis of 3-isobutylglutaric acid, an intermediate in the synthesis of (S)-Pregabalin.
    Type: Application
    Filed: April 24, 2007
    Publication date: November 8, 2007
    Inventors: Vinod Kansal, Brijnath Chaurasia, Hitesh Patel, Shivaji Shelke, Yogesh More
  • Novel asymmetric synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid
    Publication number: 20070197827
    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: September 19, 2006
    Publication date: August 23, 2007
    Inventors: Vinod Kansal, Brijnath Chaurasia, V. Govardhan Rao, Anand Tiwari
  • Chiral 3-carbamoylmethyl-5-methyl hexanoic acids, key intermediates for the synthesis of (S)-Pregabalin
    Publication number: 20070191636
    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: Application
    Filed: September 19, 2006
    Publication date: August 16, 2007
    Inventors: Vinod Kansal, Brijnath Chaurasia, Anand Tiwari
  • Process for the preparation of highly pure 1-[2- dimethylamino-(4-methoxyphenyl)ethyl]cyclohexanol hydrochloride
    Publication number: 20070129562
    Abstract: The invention encompasses processes for the preparation of highly pure venlafaxine hydrochloride, 1-[2-dimethylamino-(4-methoxyphenyl)ethyl]cyclohexanol hydrochloride, as well as intermediates thereof.
    Type: Application
    Filed: October 19, 2006
    Publication date: June 7, 2007
    Inventors: Vinod Kansal, Brijnath Chaurasia, Mahagare Jaysing, Shivaji Shelke