3-amino-6-(tetrahydrofuran-2-yl)pyrazine-2-carboxylic acid methyl ester 、 4-amino-N,1-dimethyl-1H-pyrazole-3-carboxamide hydrochloride 以to obtain the title compound as yellow solid (64%)的产率得到3-amino-N-(1-methyl-3-(methylcarbamoyl)-1H-pyrazol-4-yl)-6-(tetrahydrofuran-2-yl)pyrazine-2-carboxamide