Disclosed is a process for preparing 7-(1-hydroxethyl)-3-(2-aminoethylthio)-1-carbadethiaceph-3-em-3-carboxylic acid and its pharmaceutically acceptable salts and esters (I) by total synthesis starting with L-aspartic acid and proceeding via intermediate II: ##STR1## R=blocking group
揭示了一种制备7-(1-羟乙基)-3-(2-
氨基乙
硫基)-1-卡巴德
硫代头孢-3-酮-3-
羧酸及其药用可接受的盐和酯(I)的过程,该过程通过从L-天冬酰胺开始的全合成,经过中间体II进行:##STR1## R=阻断基