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:
Nov. 24, 1987
Filed:
Oct. 21, 1985
Applicant:
Inventors:
Yasuhiro Takahashi, Chiba, JP;
Kazutaka Arai, Yotsukaido, JP;
Yoshio Ohara, Narashino, JP;
Hiroo Matsumoto, Funabashi, JP;
Syuuzi Tsuchiya, Shiroimachi, JP;
Assignee:
Nissan Chemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560105 ;
Abstract
2-Phenylpropoionic acid ester of Formula (I): ##STR1## wherein R represents p-nitrophenyl group, .beta.-naphthyl group or 2-(.beta.-naphthyl)ethyl group. Optical resolution of the above is carried out by preferential crystallization by seeding either one of the optical isomers into a super-saturated solution of a racemic modification thereof or a mixture of the optical isomers thereof. The efficiency of the optical resolution can be increased by optional addition of a recemizing agent comprising a strongly basic amine or an alcholate.