Patents by Inventor Yadagiri R. Pendri

Yadagiri R. Pendri 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 VERDIPERSTAT
    Publication number: 20230192702
    Abstract: An improved process for preparing verdiperstat is disclosed. The process includes the steps of reacting a compound having formula or a salt thereof, wherein R is the same or different and is each independently a C1-05 alkyl with 3-(dimethylamino)acrylonitrile to obtain a compound having formula and converting the compound having formula to verdiperstat.
    Type: Application
    Filed: May 5, 2021
    Publication date: June 22, 2023
    Inventors: Yadagiri R. PENDRI, Srinivasa KATHAM, Dhanaraj Reddy CHILAKALA, Chendrasekhar KEDAS, Srinivasa Rao KANDIYALA, Sreenivas MENDE
  • Process for preparing fluoroleucine alkyl esters
    Patent number: 9493400
    Abstract: This invention relates to a resolution process for the preparation of fluoroleucine alkyl esters.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: November 15, 2016
    Assignee: Merck Sharp & Dohme Corp.
    Inventors: Nelo Rivera, Yadagiri R. Pendri, Sreenivas Mende, Bramhananda N. Reddy
  • PROCESS FOR PREPARING FLUOROLEUCINE ALKYL ESTERS
    Publication number: 20150045575
    Abstract: This invention relates to a resolution process for the preparation of fluoroleucine alkyl esters.
    Type: Application
    Filed: March 25, 2013
    Publication date: February 12, 2015
    Inventors: Nelo Rivera, Yadagiri R. Pendri, Sreenivas Mende, Bramhananda N. Reddy
  • Intermediates in the preparation of entecavir via carbon-silicon oxidation
    Patent number: 7968555
    Abstract: Processes for preparing entecavir and novel intermediates thereof using carbon-silicon oxidation.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: June 28, 2011
    Assignee: Bristol-Myers Squibb Company
    Inventors: Maotang X. Zhou, Emily A. Reiff, Purushotham Vemishetti, Yadagiri R. Pendri, Ambarish K. Singh, Siva Josyula Prasad, Ulhas P. Dhokte, Xinhua Qian, Pia Mountford, Kerry B. Hartung, Helen Sailes
  • Process for the Preparation of Entecavir and Novel Intermediates Thereof Via Carbon-Silicon Oxidation
    Publication number: 20100286089
    Abstract: Processes for preparing entecavir and novel intermediates thereof using carbon-silicon oxidation.
    Type: Application
    Filed: July 22, 2010
    Publication date: November 11, 2010
    Inventors: Maotang X. Zhou, Emily A. Reiff, Purushotham Vemishetti, Yadagiri R. Pendri, Ambarish K. Singh, Siva Josyula Prasad, Ulhas P. Dhokte, Xinhua Qian, Pia Mountford, Kerry B. Hartung, Helen Sailes
  • Process for preparation of entecavir and novel intermediates thereof via carbon-silicon oxidation
    Patent number: 7786300
    Abstract: Processes for preparing entecavir and novel intermediates thereof using carbon-silicon oxidation.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: August 31, 2010
    Assignee: Bristol-Myers Squibb Company
    Inventors: Maotang X. Zhou, Emily A. Reiff, Purushotham Vemishetti, Yadagiri R. Pendri, Ambarish K. Singh, Siva Josyula Prasad, Ulhas P. Dhokte, Xinhua Qian, Pia Mountford, Kerry B. Hartung, Helen Sailes
  • Intermediates in the preparation of the antiviral agent [1S-(1?, 3?, 4?)]-2-amino-1,9-dihydro-9-[4-hydroxy-3-(hydroxmethyl)-2-methylenecyclopentyl]-6H-purin-6-one
    Patent number: 7550619
    Abstract: Intermediates useful in the preparation of the antiviral agent entecavir are disclosed. A resin adsorption process for the isolation and purification of entecavir is also disclosed. Various processes useful in the preparation of entecavir are also disclosed.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: June 23, 2009
    Assignee: Bristol-Myers Squibb Company
    Inventors: Yadagiri R. Pendri, Chung-Pin H. Chen, Jing Liang, Shaopeng Wang, Milan Stojanovic, Richard P. Polniaszek, John Thottathil, Dhileepkumar Krishnamurty
  • Process for Preparation of Entecavir and Novel Intermediates Thereof Via Carbon-Silicon Oxidation
    Publication number: 20090143578
    Abstract: Processes for preparing entecavir and novel intermediates thereof using carbon-silicon oxidation.
    Type: Application
    Filed: February 4, 2009
    Publication date: June 4, 2009
    Inventors: Maotang X. Zhou, Emily A. Reiff, Purushotham Vemishetti, Yadagiri R. Pendri, Ambarish K. Singh, Siva Josyula Prasad, Ulhas P. Dhokte, Xinhua Qian, Pia Mountford, Kerry B. Hartung, Helen Sailes
  • Process for the preparation of entecavir and novel intermediates thereof via carbon-silicon oxidation
    Patent number: 7511139
    Abstract: Processes for preparing entecavir and novel intermediates thereof using carbon-silicon oxidation.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: March 31, 2009
    Assignee: Bristol-Myers Squibb Company
    Inventors: Maotang X. Zhou, Emily A. Reiff, Purushotham Vemishetti, Yadagiri R. Pendri, Ambarish K. Singh, Siva Josyula Prasad, Ulhas P. Dhokte, Xinhua Qian, Pia Mountford, Kerry B. Hartung, Helen Sailes
  • Process for preparing the antiviral agent [1S-(1alpha,3 alpha,4beta )]-2-amino-1,9-dihydro-9-[4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-purin-6-one
    Patent number: 7034152
    Abstract: Processes are disclosed for preparing the antiviral agent entecavir. A resin adsorption process for the isolation and purification of entecavir is also disclosed. Various intermediates useful in the preparation of entecavir are also disclosed.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: April 25, 2006
    Assignee: Bristol-Myers Squibb Company
    Inventors: Yadagiri R. Pendri, Chung-Pin H. Chen, Sunil S. Patel, Jeffrey M. Evans, Jing Liang, David R. Kronenthal, Gerald L. Powers, Siva Josyula Prasad, Jeffrey T. Bien, Zhongping Shi, Ramesh N. Patel, Amit Banerjee, Yeung Yu Chan, Sushil K. Rijhwani, Ambarish K. Singh, Shaopeng Wang, Milan Stojanovic, David J. Kucera, Richard P. Polniaszek, Charles Lewis, John Thottathil, Dhileepkumar Krishnamurty, Maotang X. Zhou, Purushotham Vemishetti
  • Process for preparing the antiviral agent [1S-(1alpha,3 alpha,4beta)]-2-amino-1,9-dihydro-9-[4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-purin-6-one
    Publication number: 20040192912
    Abstract: Processes are disclosed for preparing the antiviral agent entecavir. A resin adsorption process for the isolation and purification of entecavir is also disclosed. Various intermediates useful in the preparation of entecavir are also disclosed.
    Type: Application
    Filed: December 11, 2003
    Publication date: September 30, 2004
    Inventors: Yadagiri R. Pendri, Chung-Pin H. Chen, Sunil S. Patel, Jeffrey M. Evans, Jing Liang, David R. Kronenthal, Gerald L. Powers, Siva Josyula Prasad, Jeffrey T. Bien, Zhongping Shi, Ramesh N. Patel, Amit Banerjee, Yeung Yu Chan, Sushil K. Rijhwani, Ambarish K. Singh, Shaopeng Wang, Milan Stojanovic, David J. Kucera, Richard P. Polniaszek, Charles Lewis, John Thottathil, Dhileepkumar Krishnamurty, Maotang X. Zhou, Purushotham Vemishetti
  • Preparation of 3-fluoro oxindole derivatives
    Patent number: 5892106
    Abstract: The present invention relates to novel intermediates of the formula ##STR1## wherein the wavy bond () represents the racemate, the (R)-enantiomer or the (S)-enantiomer; and R is hydrogen, a carboxyl-protecting group or a cation of an addition salt; or solvate thereof; and to the use thereof in a process for the preparation of certain 3-fluoro oxindole derivatives.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: April 6, 1999
    Assignee: Bristol-Myers Squibb Company
    Inventors: Yadagiri R. Pendri, Eduardo J. Martinez, John K. Thottathil, Piyasena Hewawasam
  • Preparation of 3-fluoro oxindole derivatives
    Patent number: 5808095
    Abstract: The present invention relates to novel intermediates of the formula ##STR1## wherein the wavy bond () represents the racemate, the (R)-enantiomer or the (S)-enantiomer; and R is hydrogen, a carboxyl-protecting group or a cation of an addition salt; or solvate thereof; and to the use thereof in a process for the preparation of certain 3-fluoro oxindole derivatives.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: September 15, 1998
    Assignee: Bristol-Myers Squibb Company
    Inventors: Yadagiri R. Pendri, Eduardo J. Martinez, John K. Thottathil, Piyasena Hewawasam