5-Amino-pyridazin-4-carbonsaeure-ethylester 、
2-(2,4,6-trifluorophenyl)acetyl chloride 在
4-二甲氨基吡啶 作用下,
以
甲苯 为溶剂,
反应 5.0h,
以to give 5-[2-(2,4,6-trifluorophenyl)-acetylamino]-pyridazine-4-carboxylic acid ethyl ester as a white solid (2.6 g), m.p. 143-144° C.的产率得到5-[2-(2,4,6-trifluorophenyl)-acetylamino]-pyridazine-4-carboxylic acid ethyl ester