tert-butyl N-[(2S)-1-(3,3-difluoro-2-hydroxy-6-oxopiperidin-1-yl)-4-oxo-4-[2-propyl-4-(trifluoromethyl)-6,8-dihydro-5H-pyrido[3,4-d]pyrimidin-7-yl]butan-2-yl]carbamate 在
盐酸 作用下,
以
1,4-二氧六环 为溶剂,
反应 1.0h,
以77%的产率得到1-[(S)-2-amino-4-oxo-4-(2-propyl-4-trifluoromethyl-5,8-dihydro-6H-pyrido[3,4-d]pyrimidin-7-yl)-butyl]-5,5-difluoro-6-hydroxy-piperidin-2-one hydrochloride