Patents by Inventor Gangadasu Banda

Gangadasu Banda 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).

  • Substituted dihydropyrimidinone preparation using polyaniline salt catalyst
    Patent number: 7232905
    Abstract: The present invention provides a process for the preparation of substituted dihydropyrimidinones using polyaniline salts as reusable catalysts, which comprises reacting an aldehyde, a ?-keto ester and urea/thiourea in the presence of a polyaniline salt catalyst and separating the substituted dihydropyrimidinone obtained.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: June 19, 2007
    Assignee: Council of Scientific and Industrial Research
    Inventors: Palaniappan Srinivasan, Vaidya J. Rao, Gangadasu Banda
  • Substituted dihydropyrimidinone preparation using polyaniline salt catalyst
    Publication number: 20050215790
    Abstract: The present invention provides a process for the preparation of substituted dihydropyrimidinones using polyaniline salts as reusable catalysts, which comprises reacting an aldehyde, a ?-keto ester and urea/thiourea in the presence of a polyaniline salt catalyst and separating the substituted dihydropyrimidinone obtained.
    Type: Application
    Filed: March 26, 2004
    Publication date: September 29, 2005
    Applicant: Council of Scientific and Industrial Research
    Inventors: Palaniappan Srinivasan, Vaidya Rao, Gangadasu Banda
  • Process for the preparation of 2-chloro-5-methylpyridine-3-carbaldehyde
    Patent number: 6479664
    Abstract: The present invention describes an improved process for the preparation of 2-chloro-5-methylpyridine-3-carbaldehyde from N-benzyl-N-(1-Propenyl)acetamide using diphosgene and dimethylformamide or triphosgene and dimethylformamide (Vilsmeyer reagent) in 92% yield against reported 12% yield. The present invention has the advantage of using diphosgene and triphosgene instead of toxic phosgene gas and phosphorousoxytrichloride, thereby avoiding the formation of phosphorous salt.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: November 12, 2002
    Assignee: Council of Scientific and Industrial Research
    Inventors: Gangadasu Banda, Chinaraju Bhimapaka, Vaidya Jayathirtha Rao