Patents by Inventor Dnyaneshwar Tukaram Singare

Dnyaneshwar Tukaram Singare 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 tetrabenazine and deutetrabenazine
    Patent number: 10479787
    Abstract: The present invention provides process for preparation of dihydroxy benzoquinoline compound (III) comprising reacting dihydroxy isoquinoline compound (IV) or a salt thereof with (2-acetyl-4-methyl-pentyl)-trimethyl-ammonium iodide (V) and further converting it to tetrabenazine (I) and deutetrabenazine (II).
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: November 19, 2019
    Assignee: Lupin Limited
    Inventors: Tushar Nandkumar Despande, Dnyaneshwar Tukaram Singare, Yogesh Dadaji Pawar, Yuvraj Atmaram Chavan, Purna Chandra Ray, Girij Pal Singh
  • NOVEL PROCESS FOR PREPARATION OF TETRABENAZINE AND DEUTETRABENAZINE
    Publication number: 20190135803
    Abstract: The present invention provides process for preparation of dihydroxy benzoquinoline compound (III) comprising reacting dihydroxy isoquinoline compound (IV) or a salt thereof with (2-acetyl-4-methyl-pentyl)-trimethyl-ammonium iodide (V) and further converting it to tetrabenazine (I) and deutetrabenazine (II).
    Type: Application
    Filed: April 12, 2017
    Publication date: May 9, 2019
    Applicant: Lupin Limited
    Inventors: Tushar Nandkumar DESPANDE, Dnyaneshwar Tukaram SINGARE, Yogesh Dadaji PAWAR, Yuvraj Atmaram CHAVAN, Purna Chandra RAY, Girij Pal SINGH
  • Novel Salts of Raltegravir
    Publication number: 20160185766
    Abstract: Provided herein are novel salts of raltegravir, viz., meglumine salt, erbumine salt, ammonium salt, tris salt and L-arginine salt of raltegravir and processes for their preparation.
    Type: Application
    Filed: September 16, 2015
    Publication date: June 30, 2016
    Inventors: Purna Chandra Ray, Ashok Sopanrao Yadav, Dnyaneshwar Tukaram Singare, Surinder Kumar Arora, Girij Pal Singh
  • STABLE AMORPHOUS RALTEGRAVIR POTASSIUM PREMIX AND PROCESS FOR THE PREPARATION THEREOF
    Publication number: 20150328215
    Abstract: The present invention relates to a stable amorphous Raltegravir potassium premix, method of making and pharmaceutical composition thereof.
    Type: Application
    Filed: January 25, 2013
    Publication date: November 19, 2015
    Inventors: Surinder Kumar ARORA, Dnyaneshwar Tukaram SINGARE, Amol Dattatreya GALANDE, Purna Chandra RAY, Dilip Gopalkrishna SAOJI, Makrand AVACHAT, Girij Pal SINGH
  • Salts of raltegravir
    Patent number: 9163009
    Abstract: The present invention provides novel salts of raltegravir, viz., meglumine salt, erbumine salt, ammonium salt, tris salt and L-arginine salt of raltegravir and processes for their preparation.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: October 20, 2015
    Assignee: Lupin Limited
    Inventors: Purna Chandra Ray, Ashok Sopanrao Yadav, Dnyaneshwar Tukaram Singare, Surinder Kumar Arora, Girij Pal Singh
  • NOVEL PROCESS AND INTERMEDIATE FOR PREPARATION OF ULIPRISTAL
    Publication number: 20150274770
    Abstract: The present invention is related to a novel process for the preparation of ulipristal (I) that comprises reaction of 17-?-ethynyl-17-?-hydroxy-11-?-(4-N,N-dimethylamino phenyl)- 9-norpregna-4,9-diene-3-one (III) with phenyl sulphenyl chloride (IVa) or p-nitro phenyl sulphenyl chloride (Nb) in the presence of organic base and solvent to give sulfoxide (Va) or (Vb) respectively. Sulfoxides (Va) or (Vb) are reacted with alkali metal alkoxide in alcoholic solvent followed by treatment with aqueous acid. The present invention also relates to novel intermediate 11-?-(4-N,N-dimethylaminophenyl)-21(p- nitro-phenyl-sulphinyl)-19-norpregna-4(5), 9(10), 17(20) 20-tetraene, 3-one (Vb).
    Type: Application
    Filed: October 1, 2013
    Publication date: October 1, 2015
    Inventors: Purna Chandra Ray, Ajinath Tukaram Pathade, Suryaprakash Pandurang Patil, Yuvraj Atmaram Chavan, Girij Pal Singh, Dnyaneshwar Tukaram Singare, Yogesh Dadaji Pawar
  • Novel Salts of Raltegravir
    Publication number: 20140155607
    Abstract: The present invention provides novel salts of raltegravir, viz., meglumine salt, erbumine salt, ammonium salt, tris salt and L-arginine salt of raltegravir and processes for their preparation.
    Type: Application
    Filed: April 4, 2012
    Publication date: June 5, 2014
    Applicant: LUPIN LIMITED
    Inventors: Purna Chandra Ray, Ashok Sopanrao Yadav, Dnyaneshwar Tukaram Singare, Surinder Kumar Arora, Girij Pal Singh