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. 26, 1996
Filed:
Mar. 20, 1995
Makoto Sunagawa, Itami, JP;
Haruki Matsumura, Nara, JP;
Sumitomo Pharmaceuticals Co., Ltd., Osaka-fu, JP;
Abstract
Novel and effective process for preparing a carbapenem compound of the formula (III): ##STR1## wherein R.sub.1 and R.sub.2 are each H or lower alkyl, R.sub.3 is lower alkyl, R.sub.4 is a protecting group, L is substituted or unsubstituted arylsulfonyloxy, lower alkanesulfonyloxy, halogeno-lower alkanesulfonyloxy, di-lower alkylphosphoryloxy, etc., and X is H or protected hydroxy, which comprises reacting a .beta.-lactam compound (I) with an acetic acid ester derivative (II), in the presence of base, followed by treating the product with an active esterifying agent for a hydroxy group, said compound (III) being useful as intermediate in preparing 1.beta.-alkylcarbapenem compounds having antibacterial activity.