4-(8-cyclopentyl-7-oxo-6-pyridin-2-ylmethyl-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino)-piperidine-1-carboxylic acid tert-butyl ester 、
三氟乙酸 以
二氯甲烷 为溶剂,
反应 1.0h,
以81.2%的产率得到8-cyclopentyl-2-(piperidin-4-ylamino)-6-pyridin-2-ylmethyl-8H-pyrido[2,3-d]pyrimidin-7-one trifluoroacetic acid salt