Hydrochloric Acid → HCID 178460192, compound

Participants

Reaction Steps

Conc. Hydrochloric acid (0.43 ml.) was added to a solution of 7-[2-(6-formamidopyridin-2-yl)-2-propargyloxyiminoacetamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid (syn isomer) (2.35 g.) in methanol (15 ml.), and the mixture was stirred at ambient temperature for 30 minutes. The methanol was removed by distillation under reduced pressure from the reaction mixture, and the remaining aqueous solution was diluted with water (100 ml.) and then adjusted to pH 2 with an aqueous solution of sodium bicarbonate. The precipitating crystals were collected by filtration, washed with water and then dried to give 7-[2-(6-aminopyridin-2-yl)-2-propargyloxyiminoacetamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid (syn isomer) (1.05 g.), m.p. 163°-165° C. (dec.).

Provenance & Evidence