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:
May. 15, 1990
Filed:
Mar. 01, 1989
Masatoshi Taniguchi, Tokushima, JP;
Michio Sasaoka, Tokushima, JP;
Kiyotoshi Matsumura, Tokushima, JP;
Ichiro Kawahara, Tokushima, JP;
Kenji Kaze, Tokushima, JP;
Daisuke Suzuki, Tokushima, JP;
Akihiro Shimabayashi, Tokushima, JP;
Otsuka Kagaku Kabushiki Kaisha, Osaka, JP;
Taiho Pharmaceutical Co., Ltd., Tokyo, JP;
Abstract
The invention provides a process for preparing a .beta.-lactam derivative represented by the formula ##STR1## the process comprising reacting a .beta.-lactam derivative represented by the following formula (II) and having a protected carboxyl group with a cresol; ##STR2## wherein R represents a benzyl group having an electron-donating group as a substituent on the phenyl ring, a diphenylmethyl group which may have an electron-donating group as a substituent on the phenyl ring or a tert-butyl group.