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. 21, 2000
Filed:
Mar. 11, 1999
Sigeru Torii, Okayama-ken, JP;
Hideo Tanaka, Oakayama, JP;
Michio Sasaoka, Tokushima, JP;
Yutaka Kameyama, Tokushima, JP;
Isao Wada, Tokushima, JP;
Yasuhisa Amano, Tokushima, JP;
Otsuka Kagaku Kabushiki Kaisha, Osaka, JP;
Abstract
A process for preparing an allenyl .beta.-lactam compound represented by the formula (4), characterized by reacting the hydroxyl group of a .beta.-lactam compound represented by the formula (1) with a reactive functional group derivative of sulfonic acid represented by the formula (2) to convert the compound of the formula (1) to a .beta.-lactam compound represented by the formula (3), thereafter reacting the resulting .beta.-lactam compound with a basic anion exchange resin of the type having a tertiary organic base fixed to the resin and isolating the resulting allenyl .beta.-lactam compound of the formula (4) from the reaction mixture ##STR1##