Ethyl Acetate → Diphenylmethyl 7beta-formamido-3-[(1,2,3-thiadiazol-5-yl)thio]-3-cephem-4-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of diphenylmethyl 7β-formamido-3-methanesulfonyloxy-3-cephem-4-carboxylate (1 g) in DMF (10 ml) was added sodium salt of 5-mercapto-1,2,3-thiadiazole (445 mg) at −30° C. After being stirred at −20° C. for 1 hour, the mixture was poured into a mixture of ice water and ethyl acetate. The organic layer was separated washed with water and brine, dried over magnesium sulfate, and evaporated to give diphenylmethyl 7β-formamido-3-[(1,2,3-thiadiazol-5-yl)thio]-3-cephem-4-carboxylate (961 mg).

Provenance & Evidence