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

以2-草酸二乙酯为起始原料,经缩合、基肼环合、水解等三个步骤合1-基-3-丙基吡唑-5-羧酸。