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. 23, 1976
Filed:
Dec. 04, 1973
Takeshi Takahashi, Osaka, JA;
Kenji Kawahara, Osaka, JA;
Toshiyuki Takahashi, Osaka, JA;
Koichi Kato, Osaka, JA;
Yoshio Yamazaki, Osaka, JA;
Abstract
A new method for production of a cephalosporin ester (I) which comprises reacting a derivative of an organic acid (II) with a 7-aminocephem compound (III) in the presence of an enzyme of a microorganism of one of the genera Escherichia, Bacillus, Proteus and Pseudomonas: ##SPC1## ##EQU1## ##SPC2## wherein R is an unsaturated six-membered carbocyclic ring or five-membered heterocyclic ring residue which may optionally have uncharged substituent groups; R.sup.1 is hydrogen or an uncharged substituent group such as hydroxyl or halogen; R.sup.2 is a hydrogen atom or an organic group which is bound through an oxygen, sulfur or nitrogen atom; COOR.sup.3 is a group which may easily be converted to COOH.