Lewis Acids Promoted 3 + 2 Cycloaddition of Oxaziridines and Cyclic Allylic Alcohols through Carbonyl Imine Intermediates
作者:Erbao Zhao、Feilong Zhou、Yujun Zhao
DOI:10.1021/acs.joc.9b00246
日期:2019.4.5
Syntheses of isoxazolidines through the carbonyl imine intermediates are currently limited to monosubstituted olefin substrates. Herein, we reported syntheses of novel bicyclic isoxazolidine-containing compounds through 1,3-dipolar cycloaddition reactions using cyclic allylic alcohols as substrates, which proved challenging in previous reports. Generally, the reaction yields range from good to high
通过羰基亚胺中间体的异恶唑烷的合成目前限于单取代的烯烃底物。在这里,我们报道了通过使用环状烯丙基醇作为底物的1,3-偶极环加成反应合成新型的含双环异恶唑烷的化合物,这在以前的报道中被证明是具有挑战性的。通常,反应收率范围从良好到高,并且反应底物耐受各种官能团,包括环丙基和胺基。机理研究表明,涉及到烯丙基阳离子和羰基亚胺中间体,并负责观察到的立体化学和非对映选择性。