7-Amino-8-ethyl-2-(methylsulfonyl)-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxamide 、
对氨基苯酚 在
silica gel 、
methanol-dichloromethane 作用下,
以
二甲基亚砜 为溶剂,
反应 16.0h,
以0.090 g of the expected product is obtained in the form of an off-white solid的产率得到7-Amino-8-ethyl-2-(4-hydroxyphenylamino)-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxamide