Patents by Inventor Nagesh Ganesh Praveen

Nagesh Ganesh Praveen 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 the preparation of Cefditoren
    Patent number: 7459550
    Abstract: The present invention relates to an improved process for the preparation of Cefditoren of formula (I), the said process comprising the steps of: i) converting the compound of formula (II) to a compound of the formula (III) using TPP and sodium iodide in the presence of THF, water, and base; ii) reacting the compound of formula (III) with 4-methyl-5-formyl-thiazole to produce a compound of formula (IV); iii) deesterifying the compound of the formula (IV) to yield compound of formula (V); iv) converting the compound of formula (V) to compound of formula (VI) in the presence of a base and solvent; v) converting the compound of formula (VI) into compound of formula (VII) by enzymatic hydrolysis; and vi) reacting compound of formula (VII) with compound of formula (VIII) in the presence of solvent and base to produce compound of formula (I).
    Type: Grant
    Filed: July 3, 2004
    Date of Patent: December 2, 2008
    Assignee: Orchid Chemicals & Pharmaceuticals Ltd.
    Inventors: Kumar Sahoo Prabhat, Anandam Vempali, Sivakumaran Sundaravadivelan, Nagesh Ganesh Praveen, Manikrao Waghdare Vittal, Balawant Deshpande Pandurang, Kumar Luthra Parven, Ramesh Sathe Pratik