Patents by Inventor Dhananjai Shrivastava

Dhananjai Shrivastava 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 intermediates used for the synthesis of HIV integrase inhibitor
    Patent number: 11248005
    Abstract: Provided herein is a process for the intermediates used for preparation of HIV Integrase Inhibitor such as Bictegravir, Dolutegravir, Cabotegravir or their pharmaceutically acceptable salts.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: February 15, 2022
    Assignee: Lupin Limited
    Inventors: Harishchandra Sambhaji Jadhav, Dhananjai Shrivastava, Umesh Parasharam Aher, Sharad Chandrabhan Deokar, Deepak Babasaheb Nale, Suryakant Tukaram Honrao, Girij Pal Singh
  • Process for Preparation of Intermediates Used for the Synthesis of HIV Integrase Inhibitor
    Publication number: 20210009606
    Abstract: Provided herein is a process for the intermediates used for preparation of HIV Integrase Inhibitor such as Bictegravir, Dolutegravir, Cabotegravir or their pharmaceutically acceptable salts.
    Type: Application
    Filed: July 7, 2020
    Publication date: January 14, 2021
    Inventors: Harishchandra Sambhaji Jadhav, Dhananjai Shrivastava, Umesh Parasharam Aher, Sharad Chandrabhan Deokar, Deepak Babasaheb Nale, Suryakant Tukaram Honrao, Girij Pal Singh
  • Process for the preparation of HIV integrase inhibitors
    Patent number: 10696636
    Abstract: The present invention provides compound of formula (XVII), wherein P is hydroxyl protecting group; R2 and R3 are independently lower alkyl or R2 and R3 can be alkyl and joined to form a 5-, 6- or 7-membered ring; R4 is lower alkyl, and process for its preparation.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: June 30, 2020
    Assignee: Lupin Limited
    Inventors: Girij Pal Singh, Dhananjai Shrivastava, Harishchandra Sambhaji Jadhav, Pramod Sudhakar Utekar, Digambar Yashwant Salunke
  • PROCESS FOR THE PREPARATION OF HIV INTEGRASE INHIBITORS
    Publication number: 20200172487
    Abstract: The present invention provides compound of formula (XVII), wherein P is hydroxyl protecting group; R2 and R3 are independently lower alkyl or R2 and R3 can be alkyl and joined to form a 5-, 6- or 7-membered ring; R4 is lower alkyl, and process for its preparation.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 4, 2020
    Inventors: Girij Pal Singh, Dhananjai Shrivastava, Harishchandra Sambhaji Jadhav, Pramod Sudhakar Utekar, Digambar Yashwant Salunke
  • Process for preparation of polymorphic form of Mirabegron
    Patent number: 9981927
    Abstract: The present invention is directed to process for preparation of ?-form crystal of Mirabegron, (R)-2-(2-aminothiazol-4-yl)-N-(4-(2-((2-hydroxy-2-phenylethyl) amino) ethyl) phenyl) acetamide of formula (1).
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 29, 2018
    Assignee: LUPIN LIMITED
    Inventors: Girij Pal Singh, Dhananjai Shrivastava, Paramvir Bhadwal, Malhari Deoram Bhor, Suryabhan Prabhakar Dange, Sonaraj Bholenath Jangam
  • PROCESS FOR PREPARATION OF POLYMORPHIC FORM OF MIRABEGRON
    Publication number: 20180016246
    Abstract: The present invention is directed to process for preparation of ?-form crystal of Mirabegron, (R)-2-(2-aminothiazol-4-yl)-N-(4-(2-((2-hydroxy-2-phenylethyl) amino) ethyl) phenyl) acetamide of formula (1).
    Type: Application
    Filed: February 2, 2016
    Publication date: January 18, 2018
    Inventors: Girij Pal Singh, Dhananjai Shrivastava, Paramvir Bhadwal, Malhari Deoram Bhor, Suryabhan Prabhakar Dange, Sonaraj Bholenath Jangam
  • A PROCESS FOR THE PREPARATION OF NUCLEOSIDE PHOSPHORAMIDATE
    Publication number: 20170218007
    Abstract: The present invention pertains to process for preparing nucleoside phosphoramidate and its intermediate. The present invention provides novel intermediate, its process for preparation and its use for the preparation of Sofosbuvir.
    Type: Application
    Filed: July 31, 2015
    Publication date: August 3, 2017
    Inventors: Bhairab Nath ROY, Girij Pal SINGH, Dhananjai SHRIVASTAVA, Kishor Gulabrao MEHARE, Vineet MALIK, Sharad Chandrabhan DEOKAR, Abhijeet Avinash DANGE
  • KINETIC RESOLUTION OF (4S) -- 4- PHENYL -- 3- [(5RS)-5-(4-FLUROPHENYL)-5- HYDROXYPENTANOYL] --1,3-OXAZOLIDIN-2-ONE TO THE (5S) ISOMER VIA LIPASE CATALYZED ENANTIOSELECTIVE ESTERIFICATION OF THE (5R) ISOMER
    Publication number: 20120028340
    Abstract: A process for synthesis of 4S-phenyl-3-[(5S)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-1,3 oxazolidin 2-one comprising resolution of 4S-phenyl-3-[(5RS)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-1,3 oxazolidin 2-one by selective esterification of 4S-phenyl-3-[(5R)-5-(4-fluorophenyl)-5-hydroxypentanoyl]-1,3 oxazolidin 2-one using appropriate esterification reagent in an organic solvent in presence of Lipase enzyme at a temperature ranging from 0° to 100° C., and further isolation.
    Type: Application
    Filed: April 5, 2010
    Publication date: February 2, 2012
    Inventors: Piyush Suresh Lathi, Bhairab Nath Roy, Girij Pal Singh, Dhananjai Shrivastava