Patents by Inventor Chris H. Senanayake

Chris H. Senanayake 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: 6455530
    Abstract: A method of preparation of optically pure isomers of hydroxyitraconazole, in particular the two cis dioxolane diastereomers of the sec-butyl (S,S)-isomer, and to phosphate and sulfate derivatives thereof is disclosed. Pharmaceutical compositions containing these compounds and to their use for the treatment of fungal infection are also disclosed.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: September 24, 2002
    Assignee: Sepracor Inc.
    Inventors: Patrick Koch, John R. McCullough, Chris H. Senanayake, Gerald J. Tanoury, Yaping Hong
  • Publication number: 20020115727
    Abstract: The invention relates, in part, to making of making and using, and compositions comprising, racemic and stereomerically pure cyclobutylalkylamines, including hydroxylated sibutramine and hydroxylated metabolites of sibutramine. Methods of treating and preventing a variety of diseases and disorders are disclosed, as are pharmaceutical compositions and unit dosage forms that comprise compounds of the invention.
    Type: Application
    Filed: December 3, 2001
    Publication date: August 22, 2002
    Inventors: Chris H. Senanayake, Paul D. Rubin, Thomas P. Jerussi
  • Patent number: 6166018
    Abstract: A method of preparation of optically pure isomers of hydroxyitraconazole, in particular the two cis dioxolane diastereomers of the sec-butyl (R,S)-isomer, and to phosphate and sulfate derivatives thereof is disclosed. Pharmaceutical compositions containing these compounds and their use for the treatment of fungal infection are also disclosed.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: December 26, 2000
    Assignee: Sepracor Inc.
    Inventors: John R. McCullough, Chris H. Senanayake, Gerald J. Tanoury, Yaping Hong, Patrick Koch
  • Patent number: 5952502
    Abstract: A method of preparation of optically pure isomers of hydroxyitraconazole, in particular the two cis dioxolane diastereomers of the sec-butyl (R,S)-isomer, and to phosphate and sulfate derivatives thereof is disclosed. Pharmaceutical compositions containing these compounds and to their use for the treatment of fungal infection are also disclosed.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: September 14, 1999
    Assignee: Sepracor Inc.
    Inventors: John R. McCullough, Chris H. Senanayake, Gerald J. Tanoury, Yaping Hong, Patrick Koch
  • Patent number: 5858737
    Abstract: A process is disclosed that bioconverts indene to (1S)-amino-(2R)-indanol substantially free of any of its stereoisomers, by the action of a strain of P. putida or Rhodococcus sp., followed by various chemical step(s), e.g., chiral specific crystallization, treatment with strong acid in the presence of acetonitrile.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: January 12, 1999
    Assignee: Merck & Co., Inc.
    Inventors: Barry C. Buckland, Neal C. Connors, Michel M. Chartrain, Francis P. Gailliot, Randolph L. Greasham, Barbara Jackey, Brian Heimbuch, Chanyong Lee, Roger C. Olewinski, Jr., F. Edward Roberts, Paul J. Reider, Thomas R. Verhoeven, Chris H. Senanayake
  • Patent number: 5849568
    Abstract: A process is disclosed that hydrolyzes, by the action of an epoxide hydrolase of Diplodia gossipina (alternatively named Diplodia gossypina) ATCC 16391 or ATCC 10936, the undesired enantiomer of racemic indene oxide, an epoxide of indan.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: December 15, 1998
    Assignee: Merck & Co., Inc.
    Inventors: Michel M. Chartrain, Chris H. Senanayake, John P. N. Rosazza, Jinyou Zhang
  • Patent number: 5693812
    Abstract: Polymorphic forms of the angiotensin II receptor antagonist, 3-?2'-(N-benzoyl)sulfonamidobiphenyl-4-yl!methyl-5,7-dimethyl-2-ethyl-3H-i midazo?4,5-b!pyridine and a method for the preparation of these crystal forms.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: December 2, 1997
    Assignee: Merck & Co. Inc.
    Inventors: Gerald S. Brenner, Louis S. Crocker, Hossain Jahansouz, Robert D. Larsen, Chris H. Senanayake, Andrew S. Thompson, Karen C. Thompson, Thomas R. Verhoeven
  • Patent number: 5489710
    Abstract: A regioselective processes are disclosed for the synthesis of (1R,1S)-amino-(2S,2R)-alkanol, particularly (1R,1S)-amino-(2S,2R)-indanol.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: February 6, 1996
    Assignee: Merck & Co., Inc.
    Inventors: Thomas R. Verhoeven, F. Edward Roberts, Chris H. Senanayake, Kenneth M. Ryan
  • Patent number: 5449830
    Abstract: A regioselective processes are disclosed for the synthesis of (1R,1S)-amino-(2S,2R)-alkanol, particularly (1R,1S)-amino-(2S,2R)-indanol.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: September 12, 1995
    Assignee: Marck & Co., Inc.
    Inventors: Thomas R. Verhoeven, Edward F. Roberts, Chris H. Senanayake, Kenneth M. Ryan
  • Patent number: 5424432
    Abstract: This invention relates to a method for the preparation of a compound of formula I: ##STR1## a key intermediate in the synthesis of a series of Angiotensin II receptor antagonists. The invention also relates to a selective reagent for conducting the Hofmann rearrangement, particularly in the formation of a pyridinoimidazolone, which is a percursor to the formation of an imidazopyfidine of formula I. This invention also relates to a method for the preparation of imidazolutidine, a key intermediate in the synthesis of 3-(2'-(N-benzoyl)sulfonamidobiphen-4-yl)-methyl-5,7 -dimethyl-2-ethyl-3H-imidazo[4,5-b]pyridine, using pyridinoimidazolone, an unreactive urea.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: June 13, 1995
    Assignee: Merck & Co., Inc.
    Inventors: Laura E. Fredenburgh, Robert D. Larsen, Ji Liu, Robert A. Reamer, Chris H. Senanayake, Thomas R. Verhoeven
  • Patent number: 5241083
    Abstract: The natural stereochemistry at the 13-position of avermectin aglycones, normally .alpha.-oriented or below the plane of the molecule, is inverted or epimerized into the .beta.-position. The procedure starts with the avermectin aglycone compounds where the 13.alpha.-hydroxy group is activated to a mesylate leaving group. The resultant 13-.alpha.-mesylate is then displaced with a cesium carboxylate and one equivalent of the respective carboxylic acid, ending with the ester group being converted to the 13-.beta.-hydroxy configuration by transesterification in high yield.
    Type: Grant
    Filed: July 1, 1992
    Date of Patent: August 31, 1993
    Assignee: Merck & Co., Inc.
    Inventors: Timothy Bill, Chris H. Senanayake, Robert D. Larsen, Sheo B. Singh, Thomas R. Vernhoeven