Patents by Inventor Milind D. Choubal

Milind D. Choubal 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).

  • Efficient peptide couplings and their use in the synthesis and isolation of a cyclopenta (G) quinazoline trisodium salt
    Patent number: 9458188
    Abstract: A new method for the synthesis of L-Glutamyl-?-D-Glutamic acid and its use in the synthesis of (2R)-((4S)-carboxy-4-(4,N-(((6S)-2-(hydroxymethyl)-4-oxo-3,4,7,8-tetrahydro-3H-cyclopenta[g]quinazolin-6-yl)-N-(prop-2-ynyl)amino)benzamido)butanamido)pentanedioic acid, 1 are provided. Also provided is an efficient method for the isolation and purification of the trisodium salt of the abovementioned acid, 2, in a form suitable for long term storage and use in a parenteral dosing form.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: October 4, 2016
    Assignee: BTG INTERNATIONAL LIMITED
    Inventors: James Alan Kerschen, Alexander James Bridges, Milind D. Choubal, Sean Mark Dalziel, Thomas Elliott Jacks, Andrew S. Thompson, James Robert Zeller
  • EFFICIENT PEPTIDE COUPLINGS AND THEIR USE IN THE SYNTHESIS AND ISOLATION OF A CYCLOPENTA (G) QUINAZOLINE TRISODIUM SALT
    Publication number: 20130345423
    Abstract: A new method for the synthesis of L-Glutamyl-?-D-Glutamic acid and its use in the synthesis of (2R)-((4S)-carboxy-4-(4,N-(((6S)-2-(hydroxymethyl)-4-oxo-3,4,7,8-tetrahydro-3H-cyclopenta[g]quinazolin-6-yl)-N-(prop-2-ynyl)amino)benzamido)butanamido)pentanedioic acid, 1 are provided. Also provided is an efficient method for the isolation and purification of the trisodium salt of the abovementioned acid, 2, in a form suitable for long term storage and use in a parenteral dosing form.
    Type: Application
    Filed: December 19, 2011
    Publication date: December 26, 2013
    Applicant: Onyx Pharmaceutical, Inc.
    Inventors: James Alan Kershen, Thomas Elliott Jacks, Andrew S. Thompson, Alexander James Bridges, Milind D. Choubal, Sean Mark Dalziel, James Robert Zeller