Patents by Inventor Joydeep Kant

Joydeep Kant 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).

  • Patent number: 7956214
    Abstract: Provided are processes for the synthesis of aniline derivatives, specifically certain aniline derivatives which have activity as thyroid receptor ligands.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: June 7, 2011
    Assignees: Karo Bio AB, Bristol-Myers Squibb Company
    Inventors: Ramakrishnan Chidambaram, Joydeep Kant, Raymond E. Weaver, Jurong Yu, Arun Ghosh
  • Publication number: 20100145099
    Abstract: The present invention relates to polymorphic forms of milnacipran hydrochloride. The polymorphic forms are designated as Form (I), Form (II), Form (III), Form (IV) and Form V of milnacipran hydrochloride. The present invention also relates to processes for the preparation of the polymorphic forms.
    Type: Application
    Filed: February 28, 2008
    Publication date: June 10, 2010
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Roshan Ramesh Medhane, Nitin Maheswari, Keshav Deo, Mohan Prasad, Joydeep Kant
  • Publication number: 20090326263
    Abstract: Provided are processes for the synthesis of aniline derivatives, specifically certain aniline derivatives which have activity as thyroid receptor ligands.
    Type: Application
    Filed: June 15, 2009
    Publication date: December 31, 2009
    Inventors: Ramakrishnan Chidambaram, Joydeep Kant, Raymond E. Weaver, Jurong Yu, Arun Ghosh
  • Patent number: 7030253
    Abstract: A process is provided for preparing 4-alkyl- or 4-aryl-oxycarbonyl paclitaxel analogs which includes the steps of converting paclitaxel into a C-7 acylprotected paclitaxel employing an electrophilic protecting group, such as benzoyloxycarbonyl, and converting the C-7 protected analog into the 4-alkyloxycarbonyl or 4-aryloxycarbonyl paclitaxel analog. Novel intermediates produced in the process are also provided.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: April 18, 2006
    Assignee: Bristol-Myers Squibb Company
    Inventors: Frank S. Gibson, Joydeep Kant, Rajendra P. Deshpande, Karen L. TenHuisen, Jing Liang, Jun Li, Susan D. Boettger, Edward J. Gublo, Ulhas P. Dhokte
  • Patent number: 6930187
    Abstract: An improved method of synthesis of 21-amino epothilone derivatives which provides a one-pot conversion of 21-hydroxy epothilones to highly desirable 21-amino epothilones in high yield.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: August 16, 2005
    Assignee: Bristol-Myers Squibb Company
    Inventors: Denis Favreau, Joydeep Kant, Kathia Levesque, Shaopeng Wang, Zhengrong Guo, Brian Leslie James
  • Patent number: 6916942
    Abstract: A process for the preparation of novel C-4 carbonate taxanes useful as antitumor agents
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: July 12, 2005
    Assignee: Bristol-Myers Squibb Company
    Inventors: John F. Kadow, Harold Mastalerz, Joydeep Kant, Qiufen May Xue, James G. Tarrant
  • Publication number: 20050124641
    Abstract: A process is provided for preparing chiral diol sulfones of the structure where R3 is preferably where R4a is preferably aryl such as phenyl, and R1a is preferably alkyl such as t-butyl, which are intermediates used in preparing HMG CoA reductase inhibitors.
    Type: Application
    Filed: January 20, 2005
    Publication date: June 9, 2005
    Inventors: Paul Brodfuehrer, Thomas Sattleberg, Joydeep Kant, Xinhua Qian
  • Patent number: 6875867
    Abstract: A process is provided for preparing chiral diol sulfones of the structure where R3 is preferably where R4a is preferably aryl such as phenyl, and R1a is preferably alkyl such as t-butyl, which are intermediates used in preparing HMG CoA reductase inhibitors.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: April 5, 2005
    Assignee: Bristol-Myers Squibb Company
    Inventors: Paul R. Brodfuehrer, Thomas R. Sattelberg, Joydeep Kant, Xinhua Qian
  • Publication number: 20050054873
    Abstract: Provided are processes for the synthesis of aniline derivatives, specifically certain aniline derivatives which have activity as thyroid receptor ligands.
    Type: Application
    Filed: September 8, 2004
    Publication date: March 10, 2005
    Inventors: Ramakrishnan Chidambaram, Joydeep Kant, Raymond Weaver, Jurong Yu, Arun Ghosh
  • Publication number: 20050054863
    Abstract: A process is provided for preparing 4-alkyl- or 4-aryl-oxycarbonyl paclitaxel analogs which includes the steps of converting paclitaxel into a C-7 acylprotected paclitaxel employing an electrophilic protecting group, such as benzoyloxycarbonyl, and converting the C-7 protected analog into the 4-alkyloxycarbonyl or 4-aryloxycarbonyl paclitaxel analog. Novel intermediates produced in the process are also provided.
    Type: Application
    Filed: August 2, 2004
    Publication date: March 10, 2005
    Inventors: Frank Gibson, Joydeep Kant, Rajendra Deshpande, Karen TenHuisen, Jing Liang, Jun Li, Susan Boettger, Edward Gublo, Ulhas Dhokte
  • Publication number: 20040225009
    Abstract: A process for the preparation of novel C-4 carbonate taxanes useful as antitumor agents.
    Type: Application
    Filed: April 19, 2004
    Publication date: November 11, 2004
    Inventors: John F. Kadow, Harold Mastalerz, Joydeep Kant, Qiufen May Xue, James G. Tarrant
  • Patent number: 6806381
    Abstract: Provided are processes for the synthesis of aniline derivatives, specifically certain aniline derivatives which have activity as thyroid receptor ligands.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: October 19, 2004
    Assignee: Bristol-Myers Squibb Company
    Inventors: Ramakrishnan Chidambaram, Joydeep Kant, Raymond E. Weaver, Jurong Yu, Arun Ghosh
  • Publication number: 20030187039
    Abstract: An improved method of synthesis of 21-amino epothilone derivatives which provides a one-pot conversion of 21-hydroxy epothilones to highly desirable 21-amino epothilones in high yield.
    Type: Application
    Filed: February 13, 2003
    Publication date: October 2, 2003
    Inventors: Denis Favreau, Joydeep Kant, Kathia Levesque, Shaopeng Wang, Zhengrong Guo, Brian Leslie James
  • Publication number: 20030157671
    Abstract: Provided are processes for the synthesis of aniline derivatives, specifically certain aniline derivatives which have activity as thyroid receptor ligands.
    Type: Application
    Filed: October 17, 2002
    Publication date: August 21, 2003
    Inventors: Ramakrishnan Chidambaram, Joydeep Kant, Raymond E. Weaver, Jurong Yu, Arun Ghosh
  • Publication number: 20030018199
    Abstract: A process is provided for preparing chiral diol sulfones of the structure 1
    Type: Application
    Filed: May 30, 2002
    Publication date: January 23, 2003
    Inventors: Paul R. Brodfuehrer, Thomas R. Sattelberg, Joydeep Kant, Xinhua Qian
  • Patent number: 6353120
    Abstract: A process for the synthesis of a C-4 methyl carbonate paclitaxel analog from 10-deacetylbaccatin III by the selective reduction of the acetate at the C-4 position of 10-deacetylbaccatin using Red-Al.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: March 5, 2002
    Assignee: Bristol-Myers Squibb Company
    Inventor: Joydeep Kant
  • Publication number: 20010044549
    Abstract: A process for the synthesis of a C-4 methyl carbonate paclitaxel analog from 10-deacetylbaccatin III by the selective reduction of the acetate at the C-4 position of 10-deacetylbaccatin using Red-Al.
    Type: Application
    Filed: March 20, 2001
    Publication date: November 22, 2001
    Inventor: Joydeep Kant
  • Patent number: 6248908
    Abstract: A process for the synthesis of a C-4 methyl carbonate paclitaxel analog from 10-deacetylbaccatin III by the selective reduction of the acetate at the C-4 position of 10-deacetylbaccatin using Red-Al.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: June 19, 2001
    Assignee: Bristol-Myers Squibb Company
    Inventor: Joydeep Kant
  • Patent number: 5847142
    Abstract: A novel process for preparing narcotic analgesics such as hydrocodone and hydromorphone using catalytic amounts of homogeneous organometallic complexes is disclosed.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: December 8, 1998
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Bogdan Mudryk, Joydeep Kant, Chester Sapino
  • Patent number: 5478854
    Abstract: R.sup.g is C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, C.sub.3-6 cycloalkyl, or a radical of the formula --W--R.sup.x in which W is a bond, C.sub.2-6 alkenediyl, or --(CH.sub.2).sub.t --, in which t is one to six; and R.sup.x is naphthyl, phenyl, or heteroaryl, and furthermore R.sup.x can be optionally substituted with one to three same or different C.sub.1-6 alkyl, C.sub.1-6 alkoxy, halogen or --CF.sub.3 groups;R.sup.2 is --OCOR, H, OH, --OR, --OSO.sub.2 R, --OCONR.sup.o R, --OCONHR, --OCOO(CH.sub.2).sub.t R, or --OCOOR; andR and R.sup.o are independently C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.3-6 cycloalkyl, C.sub.2-6 alkynyl, or phenyl, optionally substituted with one to three same or different C.sub.1-6 alkyl, C.sub.1-6 alkoxy, halogen or --CF.sub.3 groups.Further provided by this invention are pharmaceutical formulations and intermediates for the the preparation of deoxy taxols of formula I. A method of treating mammalian tumors using a compound of formula I is also provided.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: December 26, 1995
    Assignee: Bristol-Myers Squibb Company
    Inventors: Vittorio Farina, Shu-Hui Chen, David Langley, Mark D. Wittman, Joydeep Kant, Dolatrai M. Vyas