Bromhydrol → HCID 12833979, compound

Participants

Reaction Steps

A solution of 2,2,2-trichloroethyl 2-methyl-2,3-methylene-6-{2-(3-chlorophenyl)acetamido}penam-3-carboxylate (3.4 g.) in dried dichloromethane (50 ml.) was dropwise added at -15° C. to a solution of aluminum bromide (2.8 g.) in dried dichloromethane (20 ml.) and the mixture was stirred for 3 hours at room temperature. After the reaction, the reaction mixture was washed in turn with 5% hydrochloric acid, water, 5% sodium bicarbonate aqueous solution and water and then dried. After the solvent was distilled off, the residue was crystallized from ether to give 2,2,2-trichloroethyl 2-methyl-7-{2-(3-chlorophenyl)acetamido}3-cephem-4-carboxylate (2.9 g.), mp 144° to 145.5° C. (dec.).

Provenance & Evidence