Phosphate → HCID 178508100, compound

Participants

Reaction Steps

A mixture of 0.60 g. (0.0047 mole) of 3-hydroxy-6-mercaptopyridazine, 1.27 g. (0.0047 mole) of 7-aminocephalosporanic acid, 0.78 g. (0.0094 mole) of sodium bicarbonate in 25 ml. of 0.1 M phosphate buffer (pH 6.4) was heated at 60° C. for 5 hours. The reaction mixture was filtered to remove a trace of insoluble material and the filtrate was adjusted to pH 5 with acetic acid to give brown precipitates, which were collected by filtration, washed with water and acetone successively and dried in vacuo to give 7-amino-3-(6-hydroxypyridazin-3-ylthiomethyl)-3-cephem-4-carboxylic acid; 1.03 g. (71%). M.p. 290°-300° C. (decomp.).

Provenance & Evidence