Phosphine-Catalyzed Asymmetric Tandem Isomerization/Annulation of Allyl Amines with Allenoates: Enantioselective Annulation of a Saturated C–N Bond
作者:Leijie Zhou、Xue Zhang、Qijun Wang、Min Liu、Wei Wang、Yongjun Wu、Liezhong Chen、Hongchao Guo
DOI:10.1021/acs.orglett.1c03483
日期:2021.12.3
Under catalysis by chiral phosphine, an asymmetric isomerization/annulation cascade reaction of allylamines with allenoates was realized. A wide range of γ-substituted allenoates were tolerated to afford chiral pyrroline derivatives in high yields with excellent enantioselectivities. In the reaction, isomerization of readily available N-allylamines to reactive aliphatic imines through a 1,4-proton
在手性膦的催化下,实现了烯丙胺与烯丙酸酯的不对称异构化/环化级联反应。广泛的 γ 取代的烯丙酸酯可耐受,以高产率提供手性吡咯啉衍生物,并具有优异的对映选择性。在该反应中,容易获得的N-烯丙胺通过 1,4-质子位移异构化为反应性脂肪族亚胺是一个关键步骤,它避免了高度不稳定的烷基N-磺酰亚胺的分离。