Patents by Inventor Krishna Prasad Chigurupati

Krishna Prasad Chigurupati 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 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
  • AN IMPROVED PROCESS FOR THE PREPARATION OF HCV INHIBITOR
    Publication number: 20180009790
    Abstract: The present invention provides a novel process for the preparation of Ledipasvir of Formula I and its pharmaceutically acceptable salts.
    Type: Application
    Filed: December 24, 2015
    Publication date: January 11, 2018
    Inventors: PRASAD RAJU VNKV VETUKURI, GOVERDHAN GILLA, RAJESH KUMAR RAPOLU, KRISHNA PRASAD CHIGURUPATI
  • 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
  • PROCESS FOR THE PREPARATION OF AMINO ALCOHOL DERIVATIVES OR SALTS THEREOF
    Publication number: 20170233329
    Abstract: The present invention relates to a process for the preparation of amino alcohol derivatives or salts thereof. In particular the present invention relates to 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. The present invention also specifically relates to process for the preparation of Abacavir sulfate of Formula II using compound of Formula IIIa prepared according to the process of the present invention.
    Type: Application
    Filed: October 26, 2015
    Publication date: August 17, 2017
    Inventors: KRISHNA PRASAD CHIGURUPATI, PRASAD RAJU VNKV VETUKURI, GOVERDHAN GILLA, RAJASEKHAR BHUPATHI
  • AN IMPROVED PROCESS FOR THE PREPARATION OF RIFAMYCIN DERIVATIVES
    Publication number: 20170037055
    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: Application
    Filed: April 19, 2015
    Publication date: February 9, 2017
    Inventors: Prasada Raju Vetukuri Vnkv, Goverdhan Gilla, Ambaiah Boini, Krishna Prasad Chigurupati