Patents Assigned to Apsinterm LLC
  • Patent number: 7332610
    Abstract: This invention provides intermediates useful in a method of preparing amine stereoisomers. It also provides a method of preparing sulfoxide and sulfinylamine stereoisomers using certain of the intermediates.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: February 19, 2008
    Assignee: Apsinterm LLC
    Inventors: Zhengxu Han, Dhileepkumar Krishnamurthy, Chris Hugh Senanayake, Zhi-Hui Lu
  • Patent number: 7256297
    Abstract: This invention encompasses novel methods of preparing sulfinamides and sulfoxides, particularly stereomerically pure sulfinamides and sulfoxides. The invention further encompasses novel compounds from which sulfinamides and sulfoxides can be prepared.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: August 14, 2007
    Assignee: Apsinterm, LLC.
    Inventors: Chris Hugh Senanayake, Zhengxu Han, Dhileepkumar Krishnamurthy, Derek Pflum, Harold Scott Wilkinson
  • Patent number: 7129378
    Abstract: This invention provides a method of preparing amine stereoisomers, which comprises stereoselectively reducing a sulfinylimine that bears on the sulfinyl group a residue of an alcohol, thiol or amine, or reacting a sulfinylimine stereoisomer that bears on the sulfinyl group a residue of an alcohol, thiol or amine with a source of a nucleophile, to afford a sulfinylamine stereoisomer, followed by contacting the sulfinylamine stereoisomer with a reagent suitable for the cleavage of a sulfur-nitrogen bond, to afford an amine stereoisomer. It also provides novel intermediates useful in the method, and the use of certain of the intermediates in the preparation of sulfoxide and sulfinylamine stereoisomers.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: October 31, 2006
    Assignee: Apsinterm, LLC
    Inventors: Zhengxu Han, Dhileepkumar Krishnamurthy, Chris Hugh Senanayake, Zhi-Hui Lu
  • Patent number: 7064214
    Abstract: This invention encompasses novel methods of preparing sulfinamides and sulfoxides, particularly stereomerically pure sulfinamides and sulfoxides. The invention further encompasses novel compounds from which sulfinamides and sulfoxides can be prepared.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: June 20, 2006
    Assignee: Apsinterm LLC
    Inventors: Chris Hugh Senanayake, Zhengxu Han, Dhileepkumar Krishnamurthy, Derek Pflum, Harold Scott Wilkinson