Patents by Inventor Madan Kumar Sharma

Madan Kumar Sharma 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 Levetiracetam
    Publication number: 20080146819
    Abstract: Process for the preparation of (S)-(?)-?-ethyl-2-oxo-1-pyrrolidineacetamide of Formula (I) by the steps of condensation of (S)-2-amino butanol of Formula (II) and 4-halobutryl chloride, where halo group can be chloro, bromo or iodo in solvents to form ?-ethyl-2-oxo pyrrolidine ethanol of Formula (III); oxidation of (S)-?-ethyl-2-oxo pyrrolidine ethanol to yield (S)-?-ethyl-2-oxo pyrrolidine acetic acid having the formula (IV); esterification of (S)-?-ethyl-2-oxo pyrrolidine acetic acid (IV) with an alcohol to provide alkyl ester of Formula (V) wherein, R is 14 Carbon atom; ammonolysis of alkyl esters of formula (V) with ammonia to provide (S)-(?)—?-ethyl-2-oxo-1-pyrrolidine acetamide of formula (1).
    Type: Application
    Filed: January 20, 2006
    Publication date: June 19, 2008
    Applicant: RUBAMIN LIMITED
    Inventors: Arun Kanti Mandal, Satish Wasudeo Mahajan, Madan Kumar Sharma, Apurba Chetia, Nitesh Dolatram Chauhan