7-aminocephalosporanic acid 、
o-Chloromethyl-p-methoxymandelic acid chloride 在
silica gel 、
乙醚 作用下,
以
乙酸乙酯 为溶剂,
反应 0.83h,
以to give 3-[(acetyloxy)methyl]-7-[[2-[2-(chloromethyl)-4-methoxyphenyl]-2-hydroxyacetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid的产率得到3-[(Acetyloxy)methyl]-7-[[2-[2-(chloromethyl)-4-methoxyphenyl]-2-hydroxyacetyl]amino]-8-oxo-5-thia-1-azabicyclo-[4.2.0]oct-2-ene-2-carboxylic acid