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