Patents by Inventor Ramakrishna Kamma

Ramakrishna Kamma 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 cefpodoxime proxetil
    Publication number: 20060009639
    Abstract: An improved process for the preparation of cefpodoxime proxetil of the formula (I) the said process comprises reacting cefpodoxime acid with 1-haloethyl isopropyl carbonate of the formula (VI) where X represents halogen atom such as chlorine, bromine or iodine using a base such as tetramethylguanidine, di-isopropylethyl amine, 1,5-diazabicyclo(4.3.0)non-5-ene (DBN), 1,4-diazabicyclo[2.2.2]octane (DABCO) in the presence of a solvent at a temperature in the range of ?30 ° C. to 30 ° C. to produce cefpodoxime proxetil of the formula (I) and isolating the pure cefpodoxime proxetil of the formula (I).
    Type: Application
    Filed: November 19, 2003
    Publication date: January 12, 2006
    Applicant: Orchid Chemicals & Pharmaceuticals Limited
    Inventors: Pandurang Deshpande, Gautam Das, Parven Luthra, Pramod Deshpande, Selvraj Subramanian, Ramakrishna Kamma
  • Process for the preparation of thiazole intermediate
    Patent number: 6833459
    Abstract: The present invention provides a process for the preparation of 4-methyl-5-formyl-thiazole of the formula (I) which comprises reducing the thiazole ester of the formula (III) to thiazole alcohol of the formula (IV), using sodium borohydride in the presence of AlCl3 in a solvent and oxidising using an oxidizing agent the thiazole alcohol of the formula (IV) to obtain 4-methyl-5-formyl-thiazole of the formula (I).
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: December 21, 2004
    Assignee: Orchid Chemicals & Pharmaceuticals Limited
    Inventors: Pandurang Balwant Deshpande, Parven Kumar Luthra, Rajesh Vyas, Ramakrishna Kamma
  • Process for the preparation of cephalosporins
    Publication number: 20040132995
    Abstract: The present invention relates to a process for the preparation of cephalosporin antibiotics of the formula (I) 1
    Type: Application
    Filed: November 5, 2003
    Publication date: July 8, 2004
    Applicant: ORCHID CHEMICALS & PHARMACEUTICALS, LTD.
    Inventors: Pandurang Balwant Deshpande, Parven Kumar Luthra, Ramakrishna Kamma, Gedi Sreedhar
  • Process for the preparation of thiazole intermediate
    Publication number: 20030204095
    Abstract: The present invention provides a process for the preparation of 4-methyl-5-formyl-thiazole of the formula (I) 1
    Type: Application
    Filed: December 5, 2002
    Publication date: October 30, 2003
    Applicant: Orchid Chemicals & Pharmaceuticals Limited
    Inventors: Pandurang Balwant Deshpande, Parven Kumar Luthra, Rajesh Vyas, Ramakrishna Kamma