A new method for the synthesis of 1 methyl 3 propylpyrazole 5 carboxlic acid from 2 pentanone and diethyl oxalate is reported.

以2-戊酮和草酸二乙酯原料,经缩合、甲基肼环合、三个步骤合成了1-甲基-3-丙基吡唑-5-羧酸。