ethyl 6-amino-3-methyl-4-(4-(dimethylamino)phenyl)-4,7-dihydro-1H-pyrazolo[3,4-b]pyridine-5-carboxylate 、
2-Chlor-3-(ethoxymethylenamino)pyridin 在
溶剂黄146 作用下,
以77%的产率得到ethyl 6-(N-(2-chloropyridin-3-yl)aminomethylene)amino-3-methyl-4-(4-(dimethylamino)phenyl)-4,7-dihydro-1H-pyrazolo[3,4-b]pyridine-5-carboxylate