Ethyl 3-(4-Bromo-2-fluorobenzyl)-2-methoxyimino-4-oxooctanoate 、 2-chloro-5-nitrophenylhydrazine hydrochloride 、 在
silica gel 作用下,
以to give a 54% yield of the title compound as an orange oil的产率得到ethyl 4-(4-bromo-2-fluorobenzyl)-3-n-butyl-1-(2-chloro-5-nitrophenyl)-1H-pyrazole-5-carboxylate