| abstract |
PROCEDURE FOR THE PREPARATION OF CEPHALOSPORINS OF GENERAL FORMULA (I), AND THEIR PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF, CONSISTS OF ACCYLATING A COMPOUND OF GENERAL FORMULA (II) WITH A CLEARING AGENT OF GENERAL FORMULA (III) OR WITH AN ACTIVE DERIVATIVE BY THE SAME OPTIONALLY FOLLOWED BY THE SEPARATION OF ANY AMINO OR CARBOXYL PROTECTIVE GROUPS PRESENT FROM APPLICATION IN THERAPEUTICS AS ANTIBIOTICS AND ALSO USEFUL INTERMEDIATE COMPOUNDS IN THE PREPARATION OF ANTIBIOTICS. |