Abstract:
PURPOSE: A 7-amino-3-vinyl-cephalosphorinic acid salt hydrate with a novel crystal and a method for preparing the same are provided to industrially synthesize novel crystalline 7-AVCA hydrate of high yield and high purity. CONSTITUTION: A 7-amino-3-vinyl-cephalosphorinic acid salt hydrate of chemical formula 1 with a novel crystal has characteristic peak at 8.98±0.3, 18.06±0.3, 28.95±0.3, 32.32±0.3, 33.76±0.3 and 34.40±0.3. A method for preparing the crystalline 7-amino-3-vinyl-cephalosphorinic acid salt hydrate comprises: a step of adding cresol or phenol to p-methoxybenzyl-7-phenylaceteamido3-vinyl-3-cefem-4-carboxylate and stirring to deprotect a protection group of carboxylic group; a step of adjusting pH with alkali and adding cinta CELC-PA enzyme to deprotect a protection group of amino group; a step of crystallizing the deprotected 7-AVCA by adjusting pH with inorganic acid; and a step of adding methanol solution and base to 7-AVCA and adding acid.