N-ethyl-3-(pyridin-2-yl)-1H-pyrazolo[4,3-c]pyridin-4-amine 、
N-ethyl-1-(4-methoxybenzyl)-3-(trimethylstannyl)-1H-pyrazolo[4,3-c]-pyridin-4-amine 、
2-溴-4-氰基吡啶 以to give the title compound as a yellow solid (7.0 mg, 12% yield over two steps)的产率得到2-(4-(ethylamino)-1H-pyrazolo[4,3-c]pyridin-3-yl)isonicotinonitrile