Experimental and theoretical investigations for the regio and stereoselective transformation of trans 1,2,3-trisubstituted aziridines into trans oxazolidin-2-ones
作者:Luisa Testa、Mohamed Akssira、Elena Zaballos-Garcı́a、Pau Arroyo、Luis R Domingo、Jose Sepúlveda-Arques
DOI:10.1016/s0040-4020(02)01565-x
日期:2003.1
The regio and stereoselective transformation of trans 1,2,3-trisubstituted aziridines into trans oxazolidin-2-ones takes place in good yield. However, the cis configuration at C2 and C3 in monocyclic aziridines is a limiting factor for this transformation. Ab initio calculations show that while the ring-opening process assisted by iodide is regioselective, the subsequent ring-closure is responsible
反式1,2,3-三取代的氮丙啶类化合物的区域和立体选择性转化为反式恶唑烷丁-2-酮的收率很高。但是,单环氮丙啶中C2和C3处的顺式构型是该转化的限制因素。从头算计算表明,尽管碘化物辅助的开环过程具有区域选择性,但随后的闭环是反式恶唑烷二-2-酮构型保持的原因。在顺式氮丙啶的闭环过程中发现的较大能量解释了不形成顺式恶唑烷丁-2-酮的原因。