(3-Chloro-4-methanesulfonyl-phenyl)-(4-toluenesulfonyl-hydrazono)-acetic acid methyl ester 、
三乙胺 在
Silica gel 、 hexanes ethyl acetate 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以to give (3-chloro-4-methanesulfonyl-phenyl)-diazo-acetic acid methyl ester (978 mg, 40% yield) as a bright yellowish orange solid, mp 102.7-106.5° C.的产率得到(3-chloro-4-methanesulfonyl-phenyl)-diazo-acetic acid methyl ester