7-Aminocephalosporanic acid → HCID 70455521, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-[3-(4-methyl-1-piperazinyl)propyl]-1H-tetrazole-5-thiol.dihydrochloride (75.32 g) in water (6 l) was added 7-aminocephalosporanic acid (60.0 g) and the mixture was adjusted to pH 5.4 with a saturated aqueous solution of sodium bicarbonate and stirred for 2 hours at 64° C. The reaction mixture was cooled and adjusted to pH 6.84 with a saturated aqueous solution of sodium bicarbonate. The resulting mixture was subjected to column chromatography (CM-Cephadex, H-type: 3 l), eluting with water, 0.5% aqueous solution of sodium chloride and 2% aqueous solution of sodium chloride. The fiactions containing the object compound were collected. The resulting mixture (about 7 l) was adjusted to pH 4.5 with a saturated aqueous solution of sodium bicarbonate and then subjected to column chromatography (Non-ion adsorption resin, Diaion HP 20 prepared by Mitsubishi Chemical Industries: 3 l) and eluting with water, 2% isopropyl alcohol and 15% isopropyl alcohol. The fractions containing the object compound were collected and then concentrated. The concentrate was lyophilized to give a powder of 7-amino-3-[1-[3-(4-methyl-1-piperazinyl) propyl]-1H-tetrazol-5-yl]thiomethyl-3-cephem-4-carboxylic acid (34.6 g).

Provenance & Evidence