Patents Assigned to GRANULES INDIA LIMITED
  • Process for the preparation of amino alcohol derivatives or salts thereof
    Patent number: 10385006
    Abstract: The present invention relates to a process for the preparation of amino alcohol derivatives or salts thereof which may be used as intermediates in the preparation of HIV reverse transcriptase inhibitors, more preferably Carbovir and Abacavir. The present invention more specifically relates to a process for the preparation of (1S, 4R)-4-amino-2-cyclopentene-1-methanol of Formula IIIa.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: August 20, 2019
    Assignee: GRANULES INDIA LIMITED
    Inventors: Krishna Prasad Chigurupati, Prasad Raju Vnkv Vetukuri, Goverdhan Gilla, Rajasekhar Bhupathi
  • Process for the preparation of rifamycin derivatives
    Patent number: 9765088
    Abstract: The present invention relates to an improved and industrially advantageous process for the preparation of Rifaximin with high purity and yield. Particularly, the present invention relates to improved processes for the preparation of Rifaximin from Rifamycin O and S. More particularly the present invention relates to a process for the preparation of Rifaximin through 3-halorifamycin S. The present invention further relates to a novel polymorph of Rifaximin and process for its preparation.
    Type: Grant
    Filed: April 19, 2015
    Date of Patent: September 19, 2017
    Assignee: GRANULES INDIA LIMITED
    Inventors: Prasada Raju Vetukuri Vnkv, Goverdhan Gilla, Ambaiah Boini, Krishna Prasad Chigurupati
  • Reactive distillation process for preparation of acetaminophen
    Patent number: 9102589
    Abstract: The present invention relates to continuous processes for the preparation of primary and secondary N-acetylated aromatic amines of formula I or O-acetylated product of o-hydroxy benzoic acid of Formula II using acetic acid as an acetylating agent. wherein R1 has a definition of hydrogen atom, C1-C4 alkyl group or C1-C4 alkoxy group.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: August 11, 2015
    Assignee: GRANULES INDIA LIMITED
    Inventors: Arumugam Bhaskar Krishna, Abul Hasnat, Sirisha Pamidipati
  • REACTIVE DISTILLATION PROCESS FOR PREPARATION OF ACETAMINOPHEN
    Publication number: 20120065423
    Abstract: The present invention relates to continuous processes for the preparation of primary and secondary N-acetylated aromatic amines of formula I or O-acetylated product of o-hydroxy benzoic acid of Formula II using acetic acid as an acetylating agent. wherein R1 has a definition of hydrogen atom, C1-C4 alkyl group or C1-C4 alkoxy group.
    Type: Application
    Filed: July 29, 2011
    Publication date: March 15, 2012
    Applicant: GRANULES INDIA LIMITED
    Inventors: Bhaskar Arumugam Krishna, Hasnat Abul, Pamidipati Sirisha