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:
Feb. 12, 1985
Filed:
Aug. 09, 1982
Applicant:
Inventors:
Sigeru Torii, Okayama, JP;
Hideo Tanaka, Okayama, JP;
Junzo Nokami, Okayama, JP;
Takashi Shiroi, Okayama, JP;
Norio Saito, Tokushima, JP;
Michio Sasaoka, Okayama, JP;
Assignee:
Otsuka Kagaku Yakuhin Kabushiki Kaisha, Kaisha, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544 16 ; 544 22 ;
Abstract
This invention provides a process for preparing a 3-exo-methylenecepham derivative represented by the formula ##STR1## wherein R.sup.1 represents an aralkyl or aryloxymethyl group both of which may be substituted on the aromatic ring, and R.sup.2 represents a carboxyl-protecting group, the process comprising subjecting a compound represented by the formula ##STR2## wherein R.sup.1 and R.sup.2 are as defined above, to a cyclization reaction in an acidic water-containing solvent.