7-Amino-2-[4-(4-cyclopropylpiperazin-1-yl)-2-difluoromethoxyphenylamino]-8-ethyl-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxamide 在
盐酸 作用下,
以
1,4-二氧六环 、
乙醚 为溶剂,
以87%的产率得到7-amino-2-[4-(4-cyclopropylpiperazin-1-yl)-2-difluoromethoxyphenylamino]-8-ethyl-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxamide dihydrochloride