Patents by Inventor Rajiv Ramchandra Dalvi

Rajiv Ramchandra Dalvi 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 preparation of methyl-(+)-(S)-alpha-(2-chlorophenyl)-6, 7-dihydrothieno[3,2-C]pyridine-5(4H) -acetic acid methyl ester or salts thereof having higher chiral purity and products thereof
    Patent number: 8063217
    Abstract: A process for preparation of Methyl-(+)-(S)-alpha-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-acetic acid methyl ester or salts thereof [clopidogrel or salts thereof of Formula (I)] having higher chiral purity and products thereof is provided. A process for purification of the compound prepared is also provided to enhance its efficacy by enhancing its optical rotation and chiral purity. In Formula (I), R is selected from a group comprising alkyl, alkoxy, hydroxy, amine etc., and R1 is selected from the group comprising C1-4 alkyl, C1-4 alkoxy, hydroxy, nitro & halogen. The particular salt of interest of the present invention is the hydrogen sulfate of compound of the Formula (I), wherein R and R1 are —OCH3 and chloro-group at position 2 respectively.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: November 22, 2011
    Assignee: RPG Life Sciences Limited
    Inventors: Anita Ranjan Srivastava, Prashant Pandurang Pawar, Krishna Anand Poojari, Pravin Chaitram Patil, Rajiv Ramchandra Dalvi
  • PROCESS FOR PREPARATION OF METHYL-(+)-(S)-ALPHA-(2-CHLOROPHENYL)-6, 7-DIHYDROTHIENO[3,2-C]PYRIDINE-5 (4H) -ACETIC ACID METHYL ESTER OR SALTS THEREOF HAVING HIGHER CHIRAL PURITY AND PRODUCTS THEREOF
    Publication number: 20100004453
    Abstract: A process for preparation of Methyl-(+)-(S)-alpha-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-acetic acid methyl ester or salts thereof [clopidogrel or salts thereof of Formula (I)] having higher chiral purity and products thereof is provided. A process for purification of the compound prepared is also provided to enhance its efficacy by enhancing its optical rotation and chiral purity. In Formula (I), R is selected from a group comprising alkyl, alkoxy, hydroxy, amine etc., and R1 is selected from the group comprising C1-4 alkyl, C1-4 alkoxy, hydroxy, nitro & halogen. The particular salt of interest of the present invention is the hydrogen sulfate of compound of the Formula (I), wherein R and R1 are —OCH3 and chloro-group at position 2 respectively.
    Type: Application
    Filed: July 7, 2006
    Publication date: January 7, 2010
    Applicant: RPG LIFE SCIENCES LIMITED An Indian Company of Ceat Mahal
    Inventors: Anita Ranjan Srivastava, Prashant Pandurang Pawar, Krishna Anand Poojari, Pravin Chaitram Patil, Rajiv Ramchandra Dalvi