3-(2-chloro-4-fluoro-5-aminophenyl)-5-methyl-4,5-dihydroisoxazole-5-carboxylic acid ethyl ester 、
ethyl (E)-3-(3,3-dimethylurea)-4,4,4-trifluorobut-2-enoate 在
溶剂黄146 作用下,
反应 4.0h,
以70.9%的产率得到ethyl 3-(2-chloro-5-(2,6-dioxo-4-(trifluoromethyl)-3,6-dihydropyrimidin-1(2H)-yl)-4-fluorophenyl)-5-methyl-4,5-dihydroisoxazole-5-carboxylate