Patents by Inventor Dinesh Gala

Dinesh Gala 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: 5905152
    Abstract: Aminomethyl-phenylimidazoles are produced by reaction of an ester of a hydroxymethyl-phenylimidazole with an amine. A particularly preferred ester is the acetate ester. The aminomethyl-phenylimidazoles have useful properties as highly selective partial agonists or antagonists at brain dopamine receptor subtypes. A preferred compound prepared is 5-fluoro-2-?4-?(2-phenyl-1H-imidazol-5-yl)methyl!-1-piperazinyl!pyrimidine . Esters of the hydroxymethyl-phenylimidazoles are useful intermediates.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: May 18, 1999
    Assignee: Schering Corporation
    Inventors: Dinesh Gala, Ingrid Mergelsberg, Martin Steinman, Brigitte Giesinger, Dominik Scherer
  • Patent number: 5625064
    Abstract: Described is a process for preparing triazolone compounds of the formula ##STR1## comprising heating a mixture of a compound of the formula ##STR2## and a hydrazine derivative of the formula R.sup.5 --NH--NH--CHO, R.sup.5 --NH--NH--C(O)OC(CH.sub.3).sub.3 or R.sup.5 --NH--NH--C(O)OCH.sub.2 C.sub.6 H.sub.5, optionally in the presence of an added base.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: April 29, 1997
    Assignee: Schering Corporation
    Inventors: David R. Andrews, Dinesh Gala, Jacques Gosteli, Frank Guenter, William Leong, Ingrid Mergelsberg, Anantha Sudhakar
  • Patent number: 5545558
    Abstract: A process for the preparation of a chiral .alpha.-hydroxylketone, or ester thereof, comprising hydrolyzing an ester of said .alpha.-hydroxyketone with an enzyme that has a specificity for one enantiomer, or by esterifying said .alpha.-hydroxyketone with an esterifying agent in the presence of an enzyme that favors one enantiomer.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: August 13, 1996
    Assignee: Schering Corporation
    Inventor: Dinesh Gala
  • Patent number: 5426233
    Abstract: A process for preparing an hydroxyketone of the formula (X): ##STR1## wherein Ar represents substituted phenyl, aromatic heterocyclic, or substituted aromatic heterocyclic; R.sup.1 and R.sup.2 independently represents hydrogen, C-1 to C-16 alkyl, aromatic, substituted aromatic, aromatic heterocyclic, substituted aromatic heterocyclic or C-1 to C-5 alkyl covalently bonded to Ar, with the provision that R.sup.1 and R.sup.2 are different. The process comprises contacting a compound of the formula (V): ##STR2## with a solvent, a base and a chiral hydroxylating agent at a temperature of about -85.degree. C. or less.Compounds of the formulae ##STR3## also are disclosed.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: June 20, 1995
    Assignee: Schering Corporation
    Inventor: Dinesh Gala
  • Patent number: 5180823
    Abstract: The present invention relates to a process for preparing bicyclic compounds and intermediates thereof. The compounds are useful as anti-allergic, anti-inflammatory and/or cytoprotective agents.
    Type: Grant
    Filed: October 8, 1991
    Date of Patent: January 19, 1993
    Assignee: Schering Corporation
    Inventors: Dinesh Gala, Martin Steinman, Ashit Ganguly
  • Patent number: 5079360
    Abstract: The process for making certain bicyclic compounds and intermediates which are useful as anti-allergic, anti-inflammatory and cytoprotective agents.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: January 7, 1992
    Assignee: Schering Corporation
    Inventors: Dinesh Gala, Martin Steinman, Ashit Ganguly
  • Patent number: 5075438
    Abstract: There is disclosed a process for preparing a compound represented by the formula ##STR1## where P is hydrogen.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: December 24, 1991
    Assignee: Schering Corporation
    Inventor: Dinesh Gala
  • Patent number: 5053502
    Abstract: There is disclosed a compound represented by the formula ##STR1## where P is a hydroxy protecting group.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: October 1, 1991
    Assignee: Schering Corporation
    Inventors: Donald Hou, Yee-Shing Wong, Dinesh Gala, Martin Steinman
  • Patent number: 4948885
    Abstract: There is disclosed a compound represented by the formula ##STR1## wherein each P is hydrogen or a hydroxy protecting group and R and R' are each the same and are hydrogen, ##STR2## wherein R" is lower alkyl and R'" is a carboxy protecting group. The compounds are useful as intermediates for preparing penems.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: August 14, 1990
    Assignee: Schering-Plough Corp.
    Inventors: Donald Hou, Yee-Shing Wong, Dinesh Gala, Martin Steinman
  • Patent number: 4897487
    Abstract: Processes for preparing bicyclic compounds useful as anti-allergic, anti-inflammatory and/or cytoprotective agents are described, together with a process for preparing intermediates thereof.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: January 30, 1990
    Assignee: Schering Corporation
    Inventors: Dinesh Gala, Martin Steinman, Ashit Ganguly
  • Patent number: 4876338
    Abstract: A multi-step stereospecific process for preparing (3S,4R,5R)-1-(allyloxycarbonyl)-methyl-3-(1-hydroxyethyl)-4-beta-naphthoxy thi ocarbonylthio-2-azetidinone, stereoisomers thereof or hydroxy protected analogs thereof from anhydropenicillin. The azetidinones are intermediates useful for producing penems which are a known group or antibacterial compounds. The process involves protecting the hydroxy group of anhydropenicillin with a readily removable hydroxy protecting group, then reacting the resulting compound by treatment with oxygen and cuprous chloride in methanol, followed by reaction with ozone to produce a hydroxy protected dithiobis azetidinone and convert the methylidene groups originally in the 2-position of anhydropenicillin and in the bis-compound, to a (methoxycarbonyl)-carbonyl group. The resulting compound is converted to the unprotected dithiobis compound by reaction with ammonium hydroxide, then allyliodoacetate followed by an acid.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: October 24, 1989
    Assignee: Schering Corporation
    Inventors: Donald Hou, Yee-Shing Wong, Dinesh Gala, Martin Steinman