6-benzoyl-8-cyclopentyl-2-methanesulfinyl-8H-pyrido[2,3-d]pyrimidin-7-one 、
1-Boc-4-(4-氨基苯基)哌嗪 在
ethyl acetate dichloromethane 作用下,
以
二甲基亚砜 为溶剂,
以to give 4-[4-(6-benzoyl-8-cyclopentyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino)-phenyl]-piperazine-1-carboxylic acid tert-butyl ester as a bright yellow-orange solid (2.47 g, 4.16 mmol, 82%)的产率得到4-[4-(6-benzoyl-8-cyclopentyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino)-phenyl]-piperazine-1-carboxylic acid tert-butyl ester