Conformational preferences within the tBuMe2SiOCH(Me)CN unit in 3-acetoxyaminoquinazolinone 3 lead to well defined site preferences for H, Me and OSiMe2tBu in the transition state for, and hence high diastereoselectivity in, its reaction with β-trimethylsilylstyrene 4 to give aziridine 5.
3-乙酰氧基
氨基
喹唑啉酮3中的t BuMe 2 SiOCH (Me)CN单元内的构象偏爱导致H,Me和OSiMe 2 t Bu在过渡态的确定位置偏爱,因此与它的反应具有非对映选择性。 β-三甲基甲
硅烷基
苯乙烯4得到
氮丙啶5。