Patents by Inventor Meenakhshisunderam Sivakumaran

Meenakhshisunderam Sivakumaran 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).

  • Process for preparing cefdinir
    Patent number: 7105659
    Abstract: The present invention relates to a novel process for the preparation of a cefdinir by reacting O-acetyl thioester of Formula I with in the presence of a base in suitable solvent wherein R? represents H or any carboxyl protecting group, and then converting to the cefdinir by the removal of protecting groups. This invention also relates to making the cefdinir using a novel process to prepare the O-acetyl thioester intermediate (Formula I) by condensing (Z)-2-(2-amino-4-thiazolyl)-2-acetyloxyiminoacetic acid with bis(benzothiazol-2-yl)disulphide in the presence of triphenylphosphine and a base in a suitable solvent.
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: September 12, 2006
    Assignee: Aurobind - Pharma Ltd.
    Inventors: Ramesh Dandala, V. V. Prasada Rao Korrapati, Meenakhshisunderam Sivakumaran
  • Process for preparing cefdinir
    Publication number: 20040242557
    Abstract: The present invention relates to a novel process for the preparation of intermediate, 2-mercapto-benzothiazolyl (Z)-2-(2-amino-4-thiazolyl)-2-acetyloxyiminoacetate of Formula I and its use in the preparation of Cefdinir.
    Type: Application
    Filed: October 1, 2003
    Publication date: December 2, 2004
    Inventors: Ramesh Dandala, V.V. Prasada Rao Korrapati, Meenakhshisunderam Sivakumaran