7-苯乙酰氨基－3-吡啶甲基－3-头孢菌素－4-羧酸对甲氧苄酯的合成

An improved process of the preparation of 7-phenylacetyl-3-pyridiniummethyl-4-carboxylic acid p-methoxybenzyl ester was described. The yield was 88.3% and purity 97.1%. The improved process could simplify the synthetic procedure, reduce the cost of production and increase the yield of the product.