Hydrochloric Acid → HCID 178502762, compound

Participants

Reaction Steps

Conc. hydrochloric acid (0.36 ml) was added to a solution of 7-[2-(4-formamidopyrimidin-2-yl)-2-methoxyiminoacetamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid (1.9 g) in methanol (38 ml), and the mixture was stirred at ambient temperature for 5.5 hours. The reaction mixture was concentrated, and the concentrate was diluted with water and then washed with ethyl acetate. After the ethyl acetate in the aqueous solution was removed by distillation, the aqueous solution was subjected to column chromatography on a macroporous, non-ionic adsorption resin, "Diaion HP-20" (Trade mark, manufactured by Mitsubishi Chemical Industries Ltd.) (110 ml). Elution was carried out with water (400 ml), 10% aqueous methanol (100 ml.), 20% aqueous methanol (200 ml.) and then 30% aqueous methanol (2 l.), and the fractions containing the desired compound were collected. The combined fractions were evaporated to dryness under reduced pressure to give powders (1.0 g.) of 7-[2-(4-aminopyrimidin-2-yl)-2-methoxyiminoacetamido]-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid (a mixture of syn and anti isomer), mp. 150°-160° C. (dec.).

Provenance & Evidence