Hydrochloric Acid → HCID 131714996, compound

Participants

Reaction Steps

To a solution of benzhydryl 7-[2-t-butoxycarbonylmethoxyimino-2-(2-formamidothiazol-4-yl)acetamido]-3-[(E)-2-chlorovinyl]-3-cephem-4-carboxylate (syn isomer) (3.0 g) in a mixed solvent of methanol (30 ml) and tetrahydrofuran (5 ml) was added concentrated hydrochloric acid (1.67 ml) at room temperature, and the mixture was stirred for two hours at the same temperature. The reaction mixture was diluted with water (40 ml), adjusted to pH 6.0 with an aqueous solution of sodium bicarbonate and extracted with ethyl acetate. The extract was washed with a saturated aqueous solution of sodium chloride, dried and evaporated under reduced pressure. The residue was triturated with diisopropyl ether and collected by filtration to give benzhydryl 7-[2-t-butoxycarbonylmethoxyimino-2-(2-aminothiazol-4-yl)acetamido]-3-[(E)-2-chlorovinyl]-3-cephem-4-carboxylate (syn isomer) (2.6 g).

Provenance & Evidence