Acetone → HCID 178511757, compound

Participants

Reaction Steps

To a solution of diphenylmethyl 7β-amino-3-[(1H-1,2,3-triazol-4-yl)thiomethylthio]-3-cephem-4-carboxylate (9.9 g) in formic acid (39.6 ml) was added conc. hydrochloric acid (8.54 ml) at room temperature, and the mixture was stirred at the same temperature for 2.5 hours. The mixture was poured into a mixture of acetone (297 ml) and ethyl acetate (594 ml) under ice-cooling, and the resulting precipitate was collected by filtration. The precipitate was resolved in water, and adjusted to pH 4 with 28% ammonium hydroxide under ice-cooling. The precipitate was collected by filtration to give 7β-amino-3-[(1H-1,2,3-triazol-4-yl) thiomethylthio]-3-cephem-4-carboxylic acid (5.42 g).

Provenance & Evidence