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:
Sep. 01, 2009
Filed:
Aug. 24, 2006
Takaaki Araki, Higashimurayama, JP;
Yukiyoshi Yamazaki, Higashimurayama, JP;
Kimiyuki Shibuya, Tokorozawa, JP;
Takaaki Araki, Higashimurayama, JP;
Yukiyoshi Yamazaki, Higashimurayama, JP;
Kimiyuki Shibuya, Tokorozawa, JP;
Kowa Co., Ltd., Nagoya-shi, JP;
Abstract
A process for producing an optically active 2-hydroxybutyric ester (1), characterized by including reacting an optically active 2,3-epoxybutyric ester (2) with a thiol in the presence of scandium trifluoromethanesulfonate or ytterbium trifluoromethanesulfonate, to thereby produce Compound (3), and subjecting Compound (3) to desulfurization reaction: (wherein R represents a C1 to C6 alkyl group or a C7 or C8 aralkyl group; Rrepresents a C1 to C12 alkyl group or a phenyl group; and * represents S- or R-absolute configuration). The present invention provides a process for producing an optically active 2-hydroxybutyric ester at high yield and high optical purity.