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:
Mar. 02, 1993
Filed:
Aug. 24, 1990
Hiroyuki Nohira, Urawa, JP;
Kazutaka Arai, Funabashi, JP;
Nissan Chemical Industries, Ltd., Toyko, JP;
Abstract
Optical resolution of (.+-.)-2-(3-benzoyl)-phenylpropionic acid is attained effeciently in high yield by the use of a specific optically active amine which is represented by the general formula [I]: ##STR1## wherein R.sup.1 either stands for a hydrogen atom, a chlorine atom, a bromine atom, a methyl group, or an isopropyl group or participates, as a divalent group, in forming a benzene ring in combination with two carbon atoms adjoining each other in a benzene ring to which the substituent, R.sup.1, is bonded, R.sup.2 stands for a lower alkyl group, a hydroxymethyl group, an .alpha.-hydroxybenzyl group, or a ##STR2## group (R.sup.3 standing for a hydrogen atom, a chlorine atom, a bromine atom, or a methyl group), n for 0 or 1, and * for the center of optical activity.