Patents by Inventor Deb K. Barma

Deb K. Barma 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).

  • Synthesis of dihalohydrins and tri- and tetra-substituted olefins
    Patent number: 7084281
    Abstract: A novel synthesis reaction for highly stereospecific tri- and tetra-substituted olefins is described. A single stereoisomer of stable ?-halo-?,?-ester is produced in high yield by the reaction of aldehyde or ketone with a trihalogenated compound such as trichloroacetate in the presence of CrCl2 in a solvent. By varying the amount of CrCl2 used, the stable dihalohydrin intermediate may be obtained as well.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: August 1, 2006
    Assignee: Board of Regents, The University of Texas System
    Inventors: John R. Falck, Deb K. Barma, Abhijit Kundu
  • Synthesis of dihalohydrins and tri- and tetra-substituted olefins
    Publication number: 20040143125
    Abstract: A novel synthesis reaction for highly stereospecific tri- and tetra-substituted olefins is described. A single stereoisomer of stable &agr;-halo-&agr;,&bgr;-ester is produced in high yield by the reaction of aldehyde or ketone with a trihalogenated compound such as trichloroacetate in the presence of CrCl2 in a solvent. By varying the amount of CrCl2 used, the stable dihalohydrin intermediate may be obtained as well.
    Type: Application
    Filed: January 22, 2003
    Publication date: July 22, 2004
    Applicant: Board of Regents, The University of Texas System
    Inventors: J.R. Falck, Deb K. Barma, Abhijit Kundu