Diisopropyl Ether → HCID 137175473, compound

Participants

Reaction Steps

A solution of benzhydryl 7-[2-(2-formamidothiazol-5-yl)-2-methoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate (syn isomer) (2.7 g) in anisole (3.5 ml) and trifluoroacetic acid (10.8 ml) was stirred under ice-cooling for 15 minutes. The reaction mixture was poured into diisopropyl ether (140 ml), followed by stirring for 10 minutes. The precipitated solid was collected by filtration, washed with diisopropyl ether and then dried to give 7-[2-(2-formamidothiazol-5-yl)2-methoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylic acid (syn isomer) (2.0 g), mp 147° C. (dec.).

Provenance & Evidence