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:
Aug. 25, 1992
Filed:
Mar. 07, 1991
Applicant:
Inventors:
Sigeru Torii, Okayama, JP;
Hideo Tanaka, Okayama, JP;
Masatoshi Taniguchi, Tokushima, JP;
Michio Sasaoka, Tokushima, JP;
Takashi Shiroi, Tokushima, JP;
Ryo Kikuchi, Tokushima, JP;
Yutaka Kameyama, Tokushima, JP;
Assignee:
Otsuka Kagaku Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540222 ; 540215 ; 540230 ;
Abstract
The present invention provides a process for preparing a 3-formylcephem derivative represented by the formula (2) ##STR1## which comprises oxidizing in the presence of oxygen a 3-halomethylcephem derivative represented by the formula (1) ##STR2## wherein R.sup.1 is amino group or protected amino group, R.sup.2 is hydrogen atom or a carboxylic acid protective group, X is halogen atom.