二氟乙酸酐 、
(S)-4-(3-(2,6-difluoro-4-(methylsulfonyl)phenylamino)-2-oxopyrrolidin-1-yl)-N-hydroxypiperidine-1-carboximidamide 在
crude material 、 EtOAc hexanes 作用下,
以
1,4-二氧六环 为溶剂,
反应 16.0h,
以to give (S)-3-(2,6-difluoro-4-(methylsulfonyl)phenylamino)-1-(1-(5-(difluoromethyl)-1,2,4-oxadiazol-3-yl)piperidin-4-yl)pyrrolidin-2-one (0.16 g, 0.33 mmol, 70% yield) as a white solid的产率得到(S)-3-(2,6-difluoro-4-(methylsulfonyl)phenylamino)-1-(1-(5-(difluoromethyl)-1,2,4-oxadiazol-3-yl)piperidin-4-yl)pyrrolidin-2-one