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:
Jan. 15, 1991
Filed:
Feb. 06, 1990
Masaji Ishiguro, Osaka, JP;
Hiromitsu Iwata, Osaka, JP;
Takashi Nakatsuka, Osaka, JP;
Kiyoharu Nakayama, Tokyo, JP;
Osamu Miyahara, Toyama, JP;
Kenichi Noguchi, Toyama, JP;
Suntory Limited, Osaka, JP;
Nippon Soda Co., Ltd., Tokyo, JP;
Abstract
A process for preparing an optically active tetrahydro-2-furoic acid is disclosed. The process comprises (i) reacting (.+-.)-tetrahydro-2-furoic acid with an optically active amine resolver of the following formula (I): ##STR1## wherein R.sub.1 is a lower alkyl group and R.sub.2 represents an alkyl group or ar aryl group, provided that R.sub.1 and R.sub.2 are different from each other, thus producing an optically active diastereomer salt, and (ii) decomposing the diastereomer salt. According to the process, a high purity, optically active tetrahydro-2-furoic acid can be prepared at a high yield using an amine resolver. The amine resolver can be recovered at a high yield and high purity.