The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 2006
Filed:
Apr. 07, 2003
Zhengxu Han, Shrewesbury, MA (US);
Dhileepkumar Krishnamurthy, Danbury, CT (US);
Chris Hugh Senanayake, Brookfield, CT (US);
Zhi-hui LU, Shrewsbury, MA (US);
Zhengxu Han, Shrewesbury, MA (US);
Dhileepkumar Krishnamurthy, Danbury, CT (US);
Chris Hugh Senanayake, Brookfield, CT (US);
Zhi-Hui Lu, Shrewsbury, MA (US);
Apsinterm, LLC, Wilmington, DE (US);
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.