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:
Dec. 21, 1976
Filed:
Nov. 14, 1973
Applicant:
Inventors:
Assignee:
Sumitomo Chemical Company, Limited, Osaka, J;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 424246 ; 2602391 ; 2603 / ;
Abstract
Novel penicillin derivatives of the formula (I) ##STR1## wherein R.sup.1 represents a lower alkyl group and R.sup.2 represents an ester protective group, as hereinafter defined and 7-amino-3-desacetoxycephalosporanic acid derivatives of the formula (II) ##STR2## wherein R.sup.1 represents a lower alkyl group and R.sup.2 represents an ester protective group, which are useful as precursors for the production of cephalosporin derivatives, and an improved process for producing cephalosporin derivatives of the formula (II) above and the formula (III) ##STR3## wherein R.sup.2 is an ester protective group, are disclosed.