Patents by Inventor Jiban K. Chakrabarti

Jiban K. Chakrabarti 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: 5627178
    Abstract: 2-Methyl-4-(4-methyl-1-piperazinyl)-10H-thieno-[2,3-b][1,5]benzodiazepine, or an acid salt thereof, has pharmaceutical properties, and is of particular use in the treatment of disorders of the central nervous system.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: May 6, 1997
    Assignee: Lilly Industries Limited
    Inventors: Jiban K. Chakrabarti, Terrence M. Hotten, David E. Tupper
  • Patent number: 5605897
    Abstract: Olanzapine, or an acid salt thereof, has pharmaceutical properties, and is of particular use in the treatment of disorders of the central nervous system.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: February 25, 1997
    Assignees: Eli Lilly and Company, Lilly Industries Limited
    Inventors: Charles M. Beasley, Jr., Jiban K. Chakrabarti, Terrence M. Hotten, David E. Tupper
  • Patent number: 5229382
    Abstract: 2-Methyl-10-(4-methyl-1-piperazinyl)-4H-thieno-[2,3-b][1,5]benzodiazepine, or an acid salt thereof, has pharmaceutical properties, and is of particular use in the treatment of disorders of the central nervous system.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: July 20, 1993
    Assignee: Lilly Industries Limited
    Inventors: Jiban K. Chakrabarti, Terrence M. Hotten, David E. Tupper
  • Patent number: 5051516
    Abstract: Pharmaceutical thiazolo-[1,5]benzodiazepines of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently hydrogen, C.sub.1-4 alkyl, C.sub.2-4 alkenyl, halogen, C.sub.1-4 haloalkyl, nitro, C.sub.1-4 alkoxy, C.sub.1-4 haloalkoxy, C.sub.1-4 alkylthio or phenylsulphonyl; in which R.sup.5 is a group of the formula formula ##STR2## where R.sup.7 is hydrogen, C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, benzyl or ZO--C.sub.2-6 alkyl where Z is hydrogen or an acyl group, R.sup.8 is hydrogen or C.sub.1-4 alkyl and n is 0 or 1, provided that when R.sup.7 is hydrogen n is 0; in which R.sup.6 is hydrogen, C.sub.1-10 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, C.sub.1-4 alkoxy or C.sub.1-4 alkylthio; and in which ##STR3## represents a thiazole ring selected from ##STR4## and acid addition salts thereof. The compounds have central nervous system activity.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: September 24, 1991
    Assignee: Lilly Industries Limited
    Inventors: Jiban K. Chakrabarti, Terrence M. Hotten
  • Patent number: 4542131
    Abstract: Compounds are described of the formula ##STR1## or an acid addition salt thereof; in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, C.sub.1-4 alkyl, C.sub.2-4 alkenyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, halogen, C.sub.1-4 haloalkyl, C.sub.1-4 alkanoyl, nitro, amino, C.sub.2-4 acylamino, cyano, hydroxyl, C.sub.1-4 alkoxy, C.sub.1-4 alkylthio, C.sub.1-4 haloalkoxy or a group of the formula --SO.sub.2 N(R.sup.8).sub.2, --SO.sub.2 R.sup.8 or --SO.sub.3 R.sup.8 where R.sup.8 is C.sub.1-4 alkyl, C.sub.1-4 haloalkyl or optionally substituted phenyl; in which R.sup.5 is a group of the formula ##STR2## where R.sup.9 is hydrogen, C.sub.1-4 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, C.sub.2-4 alkenyl, C.sub.1-4 alkanoyl, benzyl, cyano or optionally substituted phenyl, where R.sup.10 is hydrogen, C.sub.1-4 alkyl or optionally substituted phenyl and where n is 0 or 1; in which R.sup.6 is hydrogen, C.sub.1-10 alkyl, C.sub.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: September 17, 1985
    Assignee: Lilly Industries Limited
    Inventors: Jiban K. Chakrabarti, Terrence M. Hotten
  • Patent number: 4492699
    Abstract: These are described compounds of formula (I) ##STR1## or an acid addition salt thereof; in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, C.sub.1-4 alkyl, C.sub.2-4 alkenyl, halogen, C.sub.1-4 haloalkyl, nitro, C.sub.1-4 alkoxy, C.sub.1-4 haloalkoxy, C.sub.1-4 alkylthio or phenylsulphonyl; in which R.sup.5 is a group of the formula ##STR2## where R.sup.7 is hydrogen or C.sub.1-6 alkyl, R.sup.8 is hydrogen or C.sub.1-4 alkyl and n is 0 or 1, provided that when R.sup.7 is hydrogen n is 0; and in which R.sup.6 is attached to the 1, 2 or 3 position of the triazole ring and is hydrogen, C.sub.1-10 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, phenyl, benzyl or acyl. These compounds are pharmaceutically active and are especially useful in the treatment of disorders of the central nervous system. They are prepared by reacting an amine of formula R.sup.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: January 8, 1985
    Assignee: Lilly Industries Limited
    Inventors: Jiban K. Chakrabarti, Terrence M. Hotten, David J. Steggles
  • Patent number: 4486591
    Abstract: Compounds are described of the formula ##STR1## or an acid addition salt thereof; in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, C.sub.1-4 alkyl, C.sub.2-4 alkenyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, halogen, C.sub.1-4 haloalkyl, C.sub.1-4 alkanoyl, nitro, amino, C.sub.2-4 acylamino, cyano, hydroxyl, C.sub.1-4 alkoxy, C.sub.1-4 alkylthio, C.sub.1-4 haloalkoxy or a group of the formula -SO.sub.2 N(R.sup.8).sub.2, -SO.sub.2 R.sup.8 or -SO.sub.3 R.sup.8 where R.sup.8 is C.sub.1-4 alkyl, C.sub.1-4 haloalkyl or optionally substituted phenyl; in which R.sup.5 is a group of the formula ##STR2## where R.sup.9 is hydrogen, C.sub.1-4 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, C.sub.2-4 alkenyl, C.sub.1-4 alkanoyl, benzyl, cyano or optionally substituted phenyl, where R.sup.10 is hydrogen, C.sub.1-4 alkyl or optionally substituted phenyl and where n is 0 or 1; in which R.sup.6 is hydrogen, C.sub.1-10 alkyl, C.sub.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: December 4, 1984
    Assignee: Lilly Industries Limited
    Inventors: Jiban K. Chakrabarti, Terrence M. Hotten
  • Patent number: 4431589
    Abstract: These are described compounds of formula (I) ##STR1## or an acid addition salt thereof; in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, C.sub.1-4 alkyl, C.sub.2-4 alkenyl, halogen, C.sub.1-4 haloalkyl, nitro, C.sub.1-4 alkoxy, C.sub.1-4 haloalkoxy, C.sub.1-4 alkylthio or phenylsulphonyl; in which R.sup.5 is a group of the formula ##STR2## where R.sup.7 is hydrogen or C.sub.1-6 alkyl, R.sup.8 is hydrogen or C.sub.1-4 alkyl and n is 0 or 1, provided that when R.sup.7 is hydrogen n is 0; and in which R.sup.6 is attached to the 1, 2 or 3 position of the triazole ring and is hydrogen, C.sub.1-10 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, phenyl, benzyl or acyl. These compounds are pharmaceutically active and are especially useful in the treatment of disorders of the central nervous system. They are prepared by reacting an amine of formula R.sup.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: February 14, 1984
    Assignee: Lilly House
    Inventors: Jiban K. Chakrabarti, Terrence M. Hotten, David J. Steggles
  • Patent number: 4404137
    Abstract: Compounds are described of the formula ##STR1## or an acid addition salt thereof; in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, C.sub.1-4 alkyl, C.sub.2-4 alkenyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, halogen, C.sub.1-4 haloalkyl, C.sub.1-4 alkanoyl, nitro, amino, C.sub.2-4 acylamino, cyano, hydroxyl, C.sub.1-4 alkoxy, C.sub.1-4 alkylthio, C.sub.1-4 haloalkoxy or a group of the formula --SO.sub.2 N(R.sup.8).sub.2, --SO.sub.2 R.sup.8 or --SO.sub.3 R.sup.8 where R.sup.8 is C.sub.1-4 alkyl, C.sub.1-4 haloalkyl or optionally substituted phenyl; in which R.sup.5 is a group of the formula ##STR2## where R.sup.9 is hydrogen, C.sub.1-4 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkyl C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, C.sub.2-4 alkenyl, C.sub.1-4 alkanoyl, benzyl, cyano or optionally substituted phenyl, where R.sup.10 is hydrogen, C.sub.1-4 alkyl or optionally substituted phenyl and where n is 0 or 1; in which R.sup.6 is hydrogen, C.sub.1-10 alkyl, C.sub.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: September 13, 1983
    Assignee: Lilly Industries Limited
    Inventors: Jiban K. Chakrabarti, Terrence M. Hotten
  • Patent number: 4172831
    Abstract: Thieno[1,5]benzodiazepines having useful CNS activity containing the novel tricyclic ring system: ##STR1## the 10-position being substituted by an amino, preferably a piperazino, group.
    Type: Grant
    Filed: April 13, 1977
    Date of Patent: October 30, 1979
    Assignee: Lilly Industries Limited
    Inventors: Jiban K. Chakrabarti, David E. Tupper
  • Patent number: 4027035
    Abstract: 2-Phenyl adamantane alkyl amines are useful as antidepressants and anti-Parkinsonism agents, and may be prepared by a Friedel Crafts synthesis involving reaction of benzene with corresponding 2-halogeno compounds.
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: May 31, 1977
    Assignee: Eli Lilly and Company
    Inventors: Colin H. Cashin, Jiban K. Chakrabarti, Stephen S. Szinai