tert-butyl [(1S)-1-(4-{amino[({[(2-ethylhexyl)oxy]carbonyl}oxy)imino]methyl}phenyl)ethyl]carbamate 在
ice 、
乙醚 作用下,
以
邻二甲苯 为溶剂,
反应 1.5h,
以to obtain tert-butyl{(1S)-1-[4-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)phenyl]ethyl}carbamate (2.2 g) as a white solid的产率得到tert-butyl {(1S)-1-[4-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)phenyl]ethyl}carbamate