Organocatalytic Access to Enantioenriched Dihydropyran Phosphonates via an Inverse-Electron-Demand Hetero-Diels–Alder Reaction
作者:Christian F. Weise、Vibeke H. Lauridsen、Raoní S. Rambo、Eva H. Iversen、Marie-Luise Olsen、Karl Anker Jørgensen
DOI:10.1021/jo500347a
日期:2014.4.18
hetero-Diels–Alder reaction of the remote olefin functionality in dienamines has been developed by the simultaneous activation of α,β-unsaturated aldehydes and acyl phosphonates. The dual activation is based on an organocatalyst that activates both the α,β-unsaturated aldehyde, through dienamine formation, and the acyl phosphonate by hydrogen-bonding. The enantioselective reaction results in the formation
通过同时激活α,β-不饱和醛和酰基膦酸酯,开发了二烯胺中远程烯烃官能团的对映选择性逆电子需杂Diels-Alder反应。双重活化基于有机催化剂,该有机催化剂通过二烯胺的形成来活化α,β-不饱和醛,并通过氢键来活化酰基膦酸酯。对映选择性反应导致形成具有三个连续的立体中心的二氢吡喃骨架。杂二烯和亲二烯体都可能有不同的取代方式,并且目标产物以良好的收率和高达92%的ee获得。通过将产物转化为有价值的和复杂的合成子来证明反应的潜力。