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. 06, 1998
Filed:
Nov. 06, 1996
Applicant:
Inventors:
Assignee:
Tanabe Seiyaku Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540491 ;
Abstract
An optical resolution process of the compound of the formula (1): ##STR1## wherein Ring A and Ring B are a substituted or unsubstituted benzene ring and R.sup.1 and R.sup.2 are the same or different and a lower alkyl group, by utilizing difference in solubility between the two diastereoisomeric salts prepared by treating the racemic compound (1) with an acidic resolution agent. The present process is industrially advantageous with compared to conventional processes for preparing an optically active 3-hydroxy-1,5-benzothiazepine derivative which are useful as an intermediate for preparing medicines.