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. 27, 1990
Filed:
Sep. 07, 1988
Masatoshi Taniguchi, Tokushima, JP;
Michio Sasaoka, Tokushima, JP;
Kiyotoshi Matsumura, Tokushima, JP;
Ichiro Kawahara, Tokushima, JP;
Kenji Kase, Tokushima, JP;
Daisuke Suzuki, Tokushima, JP;
Shigeru Torii, Okayama, JP;
Hideo Tanaka, Okayama, JP;
Motoaki Tanaka, Okayama, JP;
Akira Nakai, Okayama, JP;
Otsuka Kagaku Kabushiki Kaisha, Osaka, JP;
Taiho Pharmaceutical Company, Limited, Tokyo, JP;
Abstract
The present invention provides a process for preparing a penicillanic acid derivative of the formula ##STR1## which comprises reacting lead with a halogenated penicillanic acid derivative of the formula ##STR2## wherein X, Y, Z and R.sup.1 are as defined in the specification. The reaction is advantageously conducted in the presence of a metal having higher ionization tendency than lead such as aluminum, iron, magnesium or a mixture thereof.