Patents by Inventor Vilas Dahanukar

Vilas Dahanukar 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).

  • Processes for the preparation of dehydroepiandrosterone and its intermediates
    Patent number: 9879045
    Abstract: The present application relates to a regioselective and stereoselective processes for the preparation of dehydroepi-androsterone (DHEA) and processes for its intermediates.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: January 30, 2018
    Assignee: DR. REDDY'S LABORATORIES LIMITED
    Inventors: Anna Fryszkowska, Michael Siegfried Quirmbach, Srikanth Sarat Chandra Gorantla, Sanjay Reddy Alieti, Srinivas Reddy Poreddy, Naresh Kumar Reddy Dinne, Upadhya Timmanna, Vilas Dahanukar
  • PROCESSES FOR THE PREPARATION OF DEHYDROEPIANDROSTERONE AND ITS INTERMEDIATES
    Publication number: 20160122382
    Abstract: The present application relates to a regioselective and stereoselective processes for the preparation of dehydroepiandrosterone (DHEA) and processes for its intermediates.
    Type: Application
    Filed: May 21, 2014
    Publication date: May 5, 2016
    Inventors: Anna FRYSZKOWSKA, Michael Siegfried QUIRMBACH, Srikanth Sarat Chandra GORANTLA, Sanjay Reddy ALIETI, Srinivas Reddy POREDDY, Naresh Kumar Reddy DINNE, Upadhya TIMMANNA, Vilas DAHANUKAR
  • PROCESS FOR PREPARATION OF IRON SUCROSE
    Publication number: 20150141630
    Abstract: The present invention is directed to processes for preparation of iron sucrose complex and purification of the obtained iron sucrose through diafiltration.
    Type: Application
    Filed: November 21, 2014
    Publication date: May 21, 2015
    Inventors: Amit Biswas, Vilas Dahanukar, Elati Ravi Ram Chandrasekar, Mohanarangam Saravanan, Penumandla Raja Gopal, Chandra Sekhar Vempati, Kushal Surajmal Manudhane, Ande Sameer Kumar
  • Process for the preparation of fluorotetraene
    Patent number: 8049021
    Abstract: There is provided a process for preparing 21-acetyloxy-6-alpha-fluoro-pregna-1,4,9(11),16-tetraene-3,20-dione compound of Formula I, which comprises reacting 21-acetyloxy-pregna-1,3,5,9(11),16-pentaene-3-oxo acetate with a fluorinating agent.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: November 1, 2011
    Assignees: Dr. Reddy's Laboratories Limited, Dr. Reddy's Laboratories, Inc.
    Inventors: Sergio Ferrino, Diego Torres, Vilas Dahanukar
  • Process for preparing xanthine phosphodiesterase V inhibitors and precursors thereof
    Patent number: 7786301
    Abstract: A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process. The process includes a five-step methodology for efficient synthesis of Compound 5 without intermediate purifications or separations, a dihalogenation step to synthesize Compound 7, and a coupling reaction to produce Compound 9.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: August 31, 2010
    Assignee: Schering Corporation
    Inventors: Vilas A. Dahanukar, Hoa N. Nguyen, Cecilia A. Orr, Fucheng Zhang, Ilia Zavialov
  • Synthesis of CCR5 receptor antagonists
    Patent number: 7728135
    Abstract: The present invention is directed to the synthesis of 4-[4-[(R)-[1-[cyclopropylsulfonyl)-4-piperidinyl](3-fluorophenyl)methyl]-3(S)-methyl-1-piperazinyl]-1-[(4,6-dimethyl-5-pyrimidinyl)carbonyl]-4-methylpiperidine], and intermediates therefor from readily available starting materials by a novel route.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: June 1, 2010
    Assignee: Schering Corporation
    Inventors: Xiongwei Shi, Man Zhu, William Leong, Vilas Dahanukar, Ilia A. Zavialov, Cecelia Proietti, Shannon Zhao, Hong-Chang Lee, Yi Liu, Hoa N. Nguyen, Wenxue Wu, Bosco D'Sa, Feng Liang, Loc Thanh Tran
  • SYNTHESIS OF CCR5 RECEPTOR ANTAGONISTS
    Publication number: 20100036125
    Abstract: The present invention is directed to the synthesis of 4-[4-[(R)-[1-[cyclopropylsulfonyl)-4-piperidinyl](3-fluorophenyl)methyl]-3(S)-methyl-1-piperazinyl]-1-[(4,6-dimethyl-5-pyrimidinyl)carbonyl]-4-methylpiperidine], and intermediates therefor from readily available starting materials by a novel route.
    Type: Application
    Filed: October 16, 2009
    Publication date: February 11, 2010
    Inventors: Xiongwei Shi, Man Zhu, William Leong, Vilas Dahanukar, Ilia A. Zavialov, Cecilia Proietti, Shannon Zhao, Hong-Chang Lee, Yi Liu, Hoa N. Nguyen, Wenxue Wu, Bosco D'Sa, Feng Liang, Loc Thanh Tran
  • PROCESS FOR THE PREPARATION OF FLUOROTETRAENE
    Publication number: 20080234506
    Abstract: There is provided a process for preparing 21-acetyloxy-6-alpha-fluoro-pregna-1,4,9(11),16-tetraene-3,20-dione compound of Formula I, which comprises reacting 21-acetyloxy-pregna-1,3,5,9(11),16-pentaene-3-oxo acetate with a fluorinating agent.
    Type: Application
    Filed: March 21, 2008
    Publication date: September 25, 2008
    Inventors: Sergio Ferrino, Diego Torres, Vilas Dahanukar
  • Process and intermediates for the preparation of (1R,2S,5S)-3-azabicyclo[3,1,0]hexane-2-carboxamide, N-[3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl]-3-[(2S)-2-[[[1,1-dimethylethyl]amino]carbonylamino]-3,3-dimethyl-1-oxobutyl]-6,6-dimethyl
    Patent number: 7326795
    Abstract: In one embodiment, the present application relates to a process of making a compound of formula I: and to certain intermediate compounds that are made within the process of making the compound of formula I.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: February 5, 2008
    Assignee: Schering Corporation
    Inventors: Anantha Sudhakar, Vilas Dahanukar, Ilia A. Zavialov, Cecilia Orr, Hoa N. Nguyen, Juergen Weber, Ingyu Jeon, Minzhang Chen, Michael D. Green, George S. Wong, Jeonghan Park, Tetsuo Iwama
  • Synthesis of CCR5 antagonists
    Publication number: 20060258863
    Abstract: The present invention is directed to the synthesis of 4-[4-[(R)-[1-[cyclopropylsulfonyl)-4-piperidinyl](3-fluorophenyl)methyl]-3(S)-methyl-1-piperazinyl]-1-[(4,6-dimethyl-5-pyrimidinyl)carbonyl]-4-methylpiperidine], and intermediates therefor from readily available starting materials by a novel route.
    Type: Application
    Filed: January 5, 2006
    Publication date: November 16, 2006
    Inventors: Xiongwei Shi, Man Zhu, William Leong, Vilas Dahanukar, Ilia Zavialov, Cecilia Proletei, Shannon Zhao, Hong-Chang Lee, Yi Liu, Hoa Nguyen, Wenxue Wu, Bosco D'Sa, Feng Liang, Loc Tran
  • Process for preparing xanthine phosphodiesterase V inhibitors and precursers thereof
    Publication number: 20060205943
    Abstract: A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process. The process includes a five-step methodology for efficient synthesis of Compound 5 without intermediate purifications or separations, a dihalogenation step to synthesize Compound 7, and a coupling reaction to produce Compound 9.
    Type: Application
    Filed: May 8, 2006
    Publication date: September 14, 2006
    Inventors: Vilas Dahanukar, Hoa Nguyen, Cecilia Orr, Fucheng Zhang, Ilia Zavialov
  • Process for preparing xanthine phosphodiesterase V inhibitors and precursors thereof
    Patent number: 7074923
    Abstract: A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: July 11, 2006
    Assignee: Schering Corporation
    Inventors: Vilas A. Dahanukar, Hoa N. Nguyen, Cecilia A. Orr, Fucheng Zhang, Ilia A. Zavialov
  • Process and intermediates for the preparation of (1R,2S,5S)-3-azabicyclo[3,1,0]hexane-2-carboxamide, N-[3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl]-3-[(2S)-2-[[[1,1-dimethylethyl]amino]carbonylamino]-3,3-dimethyl-1-oxobutyl]-6,6-dimethyl
    Publication number: 20050059800
    Abstract: In one embodiment, the present application relates to a process of making a compound of formula I: and to certain intermediate compounds that are made within the process of making the compound of formula I.
    Type: Application
    Filed: June 15, 2004
    Publication date: March 17, 2005
    Inventors: Anantha Sudhakar, Vilas Dahanukar, Ilia Zavialov, Cecilia Orr, Hoa Nguyen, Juergen Weber, Ingyu Jeon, Minzhang Chen, Michael Green, George Wong, Jeonghan Park, Tetsuo Iwama
  • Process for preparing xanthine phosphodiesterase V inhibitors and precursors thereof
    Publication number: 20030232987
    Abstract: A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process. The process includes a five-step methodology for efficient synthesis of Compound 5 without intermediate purifications or separations, a dihalogenation step to synthesize Compound 7, and a coupling reaction to produce Compound 9.
    Type: Application
    Filed: May 30, 2003
    Publication date: December 18, 2003
    Applicant: SCHERING CORPORATION
    Inventors: Vilas A. Dahanukar, Hoa N. Nguyen, Cecilia A. Orr, Fucheng Zhang, Ilia A. Zavialov