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:
Feb. 12, 2008
Filed:
Dec. 09, 2004
Seong Hwan Cho, Suwon, KR;
Dong Kwon Lim, Yongin, KR;
Kwang Hyeg Lee, Seongnam, KR;
Yong Sik Youn, Yongin, KR;
Choong Sil Park, Icheon, KR;
Seong Hwan Cho, Suwon, KR;
Dong Kwon Lim, Yongin, KR;
Kwang Hyeg Lee, Seongnam, KR;
Yong Sik Youn, Yongin, KR;
Choong Sil Park, Icheon, KR;
CJ Corporation, Seoul, KR;
Abstract
Provided is a method of preparing an optically pure compound having formula 1 or its salts. The method includes: reacting (R)-2-(4-methoxy-3-aminosulfonyl-phenyl)-1 -methylethylamine or its salts with a compound selected from the group consisting of chloroacetic acid, bromoacetic acid, fluoroacetic acid, iodoacetic acid, α-halogenoacetic acid anhydride, and α-halogenoacetyl halide in the presence of a base or an acylating agent.