6-(difluoromethoxy)-8-[(1R,2R)-2-hydroxy-2-methylcyclopentyl]-2-methylsulfonylpyrido[2,3-d]pyrimidin-7-one 、
1-(4-氟苯磺酰基)哌啶-4-胺盐酸盐 在
N,N-二异丙基乙胺 作用下,
以
二甲基亚砜 为溶剂,
以42 mg的产率得到6-(difluoromethoxy)-2-[[1-(4-fluorophenyl)sulfonylpiperidin-4-yl]amino]-8-[(1R,2R)-2-hydroxy-2-methylcyclopentyl]pyrido[2,3-d]pyrimidin-7-one