The organocatalytic [3+2] cycloaddition of azomethine ylides and α,β-unsaturated aldehydes as a convenient tool for the enantioselective synthesis of pyrrolizidines and indolizidines
作者:Ainara Iza、Luisa Carrillo、Jose L. Vicario、Dolores Badía、Efraim Reyes、Jose I. Martínez
DOI:10.1039/c001274b
日期:——
using conveniently substituted enantiopure pyrrolidines as common synthetic intermediates, which are easily accessible by our recently developed organocatalytic enantioselective [3+2] cycloaddition of α,β-unsaturatedaldehydes and azomethine ylides. The designed synthetic pathway makes use of a ring-closing metathesis reaction for building up the pyrrolizidine and indolizidine skeletons, while the access
我们已经开发了一种简单明了的方法,用于使用方便取代的对映纯吡咯烷作为常见的合成中间体,对映选择性制备致密取代的双环和三环氮杂环,这可以通过我们最近开发的α,β的有机催化对映选择性[3 + 2]环加成轻松地进行-不饱和醛和甲亚胺烷基化物。设计的合成途径利用闭环易位反应来构建吡咯烷并吲哚嗪 骨骼,而获得 六氢环戊达[ a ]吡咯嗪 依靠完全非对映选择性的分子内Pauson-Khand反应进行结构。