(2S)-tert-butyl 2-(4-(3-methyl-1,2,4-oxadiazol-5-yl)phenyl)morpholine-4-carboxylate 、
盐酸 在
乙酸乙酯 、
(2S)-2-(4-(3-methyl-1,2,4-oxadiazol-5-yl)phenyl)morpholine hydrochloride 作用下,
以
乙酸乙酯 为溶剂,
反应 3.0h,
以to afford (2S)-2-(4-(3-methyl-1,2,4-oxadiazol-5-yl)phenyl)morpholine hydrochloride (intermediate 19, 16.7 g, 99%)的产率得到(2S)-2-(4-(3-methyl-1,2,4-oxadiazol-5-yl)phenyl)morpholine hydrochloride