| abstract |
7-amino-cephalosporanic acids having the formula ds having the following formula to enzymatic conversion: <IMAGE> (II) wherein R represents H, OH, O-CO-R'', R'' being an alkyl radical with from 1 to 4 carbon atoms, R1 represents a carboxylic group. The reaction is carried out in the presence of a microorganism selected from the Pseudomonas, Bacillus, Achromobacter genera, or in the presence of an enzyme, either free or immobilized, derived therefrom. |