ethyl 2-[(dimethylamino)methylene]-3-oxobutanoate 、
2-氟-3-氯苯肼盐酸盐 、 在
silica gel 、
ethyl 1-(3-chloro-2-fluorophenyl)-5-methyl-1H-pyrazole-4-carboxylate 作用下,
以
乙醇 为溶剂,
反应 0.17h,
以The desired product, ethyl 1-(3-chloro-2-fluorophenyl)-5-methyl-1H-pyrazole-4-carboxylate (200 mg, 28%), was obtained as an off-white solid的产率得到ethyl 1-(3-chloro-2-fluorophenyl)-5-methyl-1H-pyrazole-4-carboxylate