Patents by Inventor Ashit K. Ganguly

Ashit K. Ganguly 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: 5403937
    Abstract: Disclosed is a process for preparing chiral compounds of the formula (I) ##STR1## wherein: X.sup.1 and X.sup.2 are independently F or Cl; and E is --SO.sub.2 R.sup.2, wherein R.sup.2 is C.sub.1 -C.sub.6 alkyl, --C.sub.6 H.sub.4 CH.sub.3 or --CF.sub.3 ; its enantiomer and racemates thereof, useful in the synthesis of tetrahydrofuran azole antifungals. Novel compounds of the formula ##STR2## wherein: X.sup.1 and X.sup.2 are independently F or Cl; B represents --C(O)Q* or --CH.sub.2 OR"; Q* represents a chiral auxiliary group; R" represents a hydroxy protecting group selected from --CH.sub.2 C.sub.6 H.sub.5, or --C(O)R.sup.1, wherein R.sup.1 is C.sub.1 -C.sub.6 alkyl; and A represents Cl, Br, I or triazolyl; are also disclosed.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: April 4, 1995
    Assignee: Schering Corporation
    Inventors: Anil K. Saksena, Viyyoor M. Girijavallabhan, Russell E. Pike, Haiyan Wang, Raymond G. Lovey, Yi-Tsung Liu, Ashit K. Ganguly, William B. Morgan, Aleksey Zaks
  • Patent number: 5350772
    Abstract: A compound represented by formula IAr.sub.1 --O--M--O--Ar.sub.2 Iwherein Ar.sub.1 and Ar.sub.2 are independently substituted phenyl or substituted pyridinyl, the substituents on said phenyl or pyridinyl being independently selected from one, two or three of (C.sub.1 -C.sub.10) alkyl, (C.sub.1 -C.sub.10) alkoxy, halogen, carbamyl, (C.sub.1 -C.sub.10) alkoxycarbonyl, oxazoyl, and (C.sub.1 -C.sub.10) alkyl substituted by halogen, (C.sub.1 -C.sub.10) alkoxy, hydroxy, or (C.sub.1 -C.sub.10) alkoxycarbonyl; M is ##STR1## (C.sub.4 -C.sub.8) alkylene, (C.sub.4 -C.sub.8) alkenylene or (C.sub.4 -C.sub.8)-alkynylene;O is oxygen;or pharmaceutically acceptable salts thereof.as well as pharmaceutical compositions containing the compounds and methods of treating or preventing viral infections, especially picornaviral infections, are disclosed.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: September 27, 1994
    Assignee: Schering Corporation
    Inventors: Viyyoor M. Girijavallabhan, Ashit K. Ganguly, Richard W. Versace
  • Patent number: 5272167
    Abstract: Compounds of the formulaZ--X--Q--Y--Wpharmaceutically acceptable acid addition, basic addition salts or quaternary amine salts thereof, whereinZ is phenyl, substituted phenyl, wherein the substituents are independently one or more of halogen, lower alkylthio, loweralkylsulfonyl, lower alkoxy, oxazol-2-yl; imidazo-1-yl; lower alkyl substituted imidazo-1-yl; or tert-butyl;X is a bond, ##STR1## Q is lower alkane-diyl or 5, 6, or 7 carbon atoms optionally substituted by --OH; loweralkylnediyl of 6-8 carbon atoms; methylcyclohexylmethyl; tetrahydrofurandiyl; or (C.sub.1 -C.sub.2) lower alkane-diyl tetrahydrofurandiyl-C.sub.1 -C.sub.2 loweralkanediyl; wherein the tetrahydrofuran ring is substituted by 0-2 hydroxy groups;Y is a bond; andW is benzimidazol-1-yl or benzimidazol-2-yl are described. These compounds have antiviral activity, antiinflammatory activity and are PAF inhibitors.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: December 21, 1993
    Assignee: Schering Corporation
    Inventors: Viyyoor M. Girijavallabhan, Ashit K. Ganguly, Patrick A. Pinto, Richard W. Versace
  • Patent number: 5225436
    Abstract: Certain aryl substituted naphthalene, benzoxepine, benzazepine and henzocycloheptene derivatives are disclosed. The compounds are useful in treating hyperproliferative skin disease, allergic reactions and inflammation.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: July 6, 1993
    Assignee: Schering Corporation
    Inventors: Neng-Yang Shih, Pietro Mangiaracina, Michael J. Green, Ashit K. Ganguly
  • Patent number: 5185334
    Abstract: Novel 2,2-disubstituted glycerol-like compounds are disclosed for use as anti-allergic and anti-inflammatory compounds. The compounds are antagonists of platelet activating factor ("PAF"). Also disclosed are methods of synthesizing and using the compounds of the invention as well as pharmaceutical compositions thereof. The compounds have the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are as defined in the specification.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: February 9, 1993
    Assignee: Schering Corporation
    Inventors: Daniel Solomon, James J. Kaminski, Steven K. White, Laura S. Lehman de Gaeta, Ashit K. Ganguly
  • Patent number: 5126352
    Abstract: Novel polycyclic quinoline, naphthyridine and pyrazinopyridine derivatives are disclosed which are useful for treatment allergic reactions, inflammation, peptic ulcers, hypertension, and hyperproliferative skin diseases and for suppressing the immune response in mammals. Methods for preparing said compounds are also disclosed.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: June 30, 1992
    Assignee: Schering Corporation
    Inventors: Ashit K. Ganguly, Richard J. Friary, John H. Schwerdt, Marvin I. Siegel, Sidney R. Smith, Vera A. Seidl, Edmund J. Sybertz
  • Patent number: 5116840
    Abstract: Novel polycyclic quinoline, naphthyridine and pyrazinopyridine derivatives are disclosed which are useful for treating allergic reactions, inflammation, peptic ulcers, hypertension, and hyperproliferative skin diseases and for suppressing the immune response in mammals. Methods for preparing said compounds are also disclosed.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: May 26, 1992
    Assignee: Schering Corporation
    Inventors: Ashit K. Ganguly, Richard J. Friary, John H. Schwerdt, Marvin I. Siegel, Sidney R. Smith, Vera A. Seidl, Edmund J. Sybertz
  • Patent number: 5104876
    Abstract: Novel benzopyrido piperidiene, piperidylidene and piperazine compounds of the generalized formula ##STR1## are disclosed as useful for the treatment of asthma, allergy and inflammation. Novel pharmaceutical compositions containing such compounds and processes for producing the compounds are also disclosed.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: April 14, 1992
    Assignee: Schering Corporation
    Inventors: John J. Piwinski, Jesse K. Wong, Michael J. Green, Ashit K. Ganguly, Frank J. Villani
  • Patent number: 5089496
    Abstract: Derivatives of benzo[5,6]cyclohepta pyridine, and pharmaceutically acceptable salts and solvates thereof are disclosed, which possess anti-allergic and anti-inflammatory activity. Methods for preparing and using the compounds are also described.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: February 18, 1992
    Assignee: Schering Corporation
    Inventors: John J. Piwinski, Ashit K. Ganguly, Michael J. Green, Frank J. Villani, Jesse Wong
  • Patent number: 5039676
    Abstract: This invention relates to tri- and tetra-substituted-oxetanes, e.g. (.+-.)-cis- and (.+-.)-trans-2-[(4-(4-isopropylpiperazin-1-yl)phenoxy)methyl]-4-(2,4-dihal ophenyl)-4-[1H-1,2,4-triazol-1-yl)-methyl]oxetane and tri- and tetra-substituted-tetrahydrofurans, e.g. (.+-.)-cis- and (.+-.)-trans-1-[4-[[2-(2,4-dihalophenyl)tetrahydro-2-[(1H-azol-1-yl)methyl ]-5-furanylmethoxy]phenyl]-4-yl-1-substituted piperazine-3-one and related derivatives which exhibit antifungal and antiallergy activities, pharmaceutical composition thereof, methods of their use in treating or preventing susceptible fungal infections and allergic reactions in a host including warm-blooded animals such as humans.
    Type: Grant
    Filed: May 11, 1990
    Date of Patent: August 13, 1991
    Assignee: Schering Corporation
    Inventors: Anil K. Saksena, Viyyoor M. Girijavallabhan, Ashit K. Ganguly, Dinanath F. Rane
  • Patent number: 5034531
    Abstract: Novel polycyclic pyranyl compounds, pharmaceutical compositions, and their use as anti-viral agents are disclosed.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: July 23, 1991
    Assignee: Schering Corporation
    Inventors: Richard J. Friary, John H. Schwerdt, Ashit K. Ganguly
  • Patent number: 5015739
    Abstract: Cyclopentyl purine derivatives, novel intermediate thereof and processes for their preparation are disclosed.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: May 14, 1991
    Assignee: Schering Corporation
    Inventors: Anil K. Saksena, Viyyoor M. Girijavallabhan, Ashit K. Ganguly
  • Patent number: 5011845
    Abstract: Compounds of the formula ##STR1## wherein R.sup.5 represents C.sub.1 to C.sub.6 -alkyl or the group--(CH.sub.2).sub.n --Z--(CH.sub.2).sub.m --Ar wherein Z represents O, S or --CH.sub.2 --and Ar is phenyl, optionally substituted by one or two groups selected from the group consisting of hydrogen, C.sub.1 to C.sub.6 -alkyl, C.sub.1 to C.sub.6 -alkoxy, Cl,F,Br,I,NO.sub.2, CF.sub.3, CN, R.sup.6 -S(O).sub.x, R.sup.7 --CO--,(R.sup.8 R.sup.9)NCO-and phenyl, wherein x is 0, 1 or 2, and each R.sup.6, R.sup.7, R.sup.8 and R.sup.9 is independently C.sub.1 to C.sub.6 alkyl or two adjacent groups on Ar may form together an additional fused benzenoid ring; n and m independently represent integers of from 1 to 8; and ring Q represents one of the rings Q.sub.1, Q.sub.2, Q.sub.3 or Q.sub.4 below: ##STR2## X is N or C--R.sup.1 ; Y is N or C--R.sup.4 ;W represents O or S;each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently selected from hydrogen, C.sub.1 to C.sub.6 -alkyl, C.sub.1 to C.sub.6 -alkoxy, Cl,F,Br,I,NO.sub.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: April 30, 1991
    Assignee: Schering Corporation
    Inventors: David J. Blythin, Ho-Jane Shue, Ashit K. Ganguly
  • Patent number: 4999428
    Abstract: Novel process for preparing cyclopentyl purine derivatives is disclosed.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: March 12, 1991
    Assignee: Schering Corporation
    Inventors: Anil K. Saksena, Viyyoor M. Girijavallabhan, Ashit K. Ganguly
  • Patent number: 4988705
    Abstract: Novel polycyclic quinoline, naphthyridine and pyrazinopyridine derivatives are disclosed which are useful for treating allergic reactions, inflammation, peptic ulcers, hypertension, and hyperproliferative skin diseases and for suppressing the immune response in mammals. Methods for preparing said compounds are also disclosed.
    Type: Grant
    Filed: February 7, 1989
    Date of Patent: January 29, 1991
    Assignee: Schering Corporation
    Inventors: Ashit K. Ganguly, Richard J. Friary, John H. Schwerdt, Marvin I. Siegel, Sidney R. Smith, Vera A. Seidl, Edmund J. Sybertz
  • Patent number: 4962146
    Abstract: 3-O-Glycosyl derivatives of 16-membered macrolides such as O-.alpha.-L-cladinosyl-(1.fwdarw.3)-12,13-dehydro-12,13-deoxorosaramicin, 2", 4",4'"-tri-O-acetyl-O-(4'-O-phenoxyacetyl-.alpha.-L-cladinosyl)-(1.fwdarw. 3)-desmyconsin and pharmaceutically acceptable acid addition salts thereof useful as antibacterials are disclosed.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: October 9, 1990
    Assignee: Schering Corporation
    Inventors: Alan K. Mallams, Randall R. Rossman, Olga Sarre, Viyyoor M. Girijavallabhan, Ashit K. Ganguly
  • Patent number: 4851423
    Abstract: The disclosed invention is compounds represented by the formulaZ--X--Q--Y--W, IZ--X--Q--Y--W'--Y--Q--X--Z IIand pharmaceutically acceptable acid addition salts and quarternary amine salts thereof, whereinZ is phenyl, naphthyl or adamantyl; substituted phenyl wherein the substituents are one or more of halogen, lower alkoxy, phenoxy, nitrile, nitro, phenylsulfonyl, methylsulfonyl, isoxazol-2-yl, lower alkanoyl, benzoyl, lower alkoxycarbonyl, lower alkyl, loweralkylthio, phenyl, phenylaminothiocarbonyl, or lower alkylaminothiocarbonyl; 5 or 6 membered unsubstituted or substituted heterocyclic ring containing at least one nitrogen and one carbon in the ring, wherein the substituents are one or more of carboxyl, hydroxymethyl, loweralkyl, loweralkylcarbonyl or aryl lower alkyl; or tertiary butyl;X and Y are each independently a bond, -O-, ##STR1## Q is a divalent substituted or unsubstituted straight or branched chain lower alkanediyl, -lower alkanedinyl- cycloalkanediyl- lower alkanediyl-, lower alkendiyl, lower
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: July 25, 1989
    Assignee: Schering Corporation
    Inventors: Viyyoor M. Girijavallabhan, Ashit K. Ganguly, Patrick A. Pinto, Richard W. Versace
  • Patent number: 4826853
    Abstract: Derivatives of 6,11-dihydro-11-(4-piperidylidene)-5H-benzo[5,6]cyclohepta[1,2-b]pyridine, and pharmaceutically acceptable salts and solvates thereof are disclosed, which possess anti-allergic and anti-inflammatory activity. Methods for preparing and using the compounds are also described.
    Type: Grant
    Filed: October 31, 1986
    Date of Patent: May 2, 1989
    Assignee: Schering Corporation
    Inventors: John J. Piwinski, Ashit K. Ganguly, Michael J. Green, Frank J. Villani, Jesse Wong
  • Patent number: 4814442
    Abstract: Processes for the production of 6-hydroxyethyl-2-substituted thio penem-3-carboxylates are disclosed as well as novel penems.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: March 21, 1989
    Assignee: Schering Corporation
    Inventors: Viyyoor M. Girijavallabhan, Ashit K. Ganguly, Patrick A. Pinto, Richard W. Versace
  • Patent number: 4810708
    Abstract: Novel polycyclic quinoline, naphthyridine and pyrazinopyridine derivatives are disclosed which are useful for treating allergic reactions, inflammation, peptic ulcers, hypertension, and hyperproliferative skin diseases and for suppressing the immune response in mammals. Methods for preparing said compounds are also disclosed.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: March 7, 1989
    Assignee: Schering Corporation
    Inventors: Ashit K. Ganguly, Richard J. Friary, John H. Schwerdt, Marvin I. Siegel, Sidney R. Smith, Vera A. Seidl, Edmund J. Sybertz