(S)-4-(3-(2,5-difluoro-4-(methylsulfonyl)phenylamino)-2-oxoazepan-1-yl)-N'-hydroxypiperidine-1-carboximidamide 、
三氟乙酸酐 在
crude material 、 hexanes ethyl acetate 作用下,
以
1,4-二氧六环 为溶剂,
反应 24.5h,
以to provide (S)-3-(2,5-difluoro-4-(methylsulfonyl)phenylamino)-1-(1-(5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl)piperidin-4-yl)azepan-2-one (0.21 g, 0.36 mmol, 28% yield) as a white solid的产率得到(S)-3-(2,5-difluoro-4-(methylsulfonyl)phenylamino)-1-(1-(5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl)piperidin-4-yl)azepan-2-one