N'-[3-(4-chloro-phenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N,N-dimethyl-formamidine 、
异氰酸乙酯 在
丙酮 作用下,
以
1,4-二氧六环 为溶剂,
反应 11.0h,
以to afford 3-(4-chlorophenyl)-4-(dimethylamino-methyleneamino)-pyrazolo[3,4-d]pyrimidine-1-carboxylic acid ethylamide (180 mg, 0.48 mmol)的产率得到3-(4-chlorophenyl)-4-(dimethylamino-methyleneamino)-pyrazolo[3,4-d]pyrimidine-1-carboxylic acid ethylamide