Asymmetric [3 + 2] Cycloaddition of Vinylcyclopropanes and α,β-Unsaturated Aldehydes by Synergistic Palladium and Organocatalysis
作者:Kim Søholm Halskov、Line Næsborg、Fernando Tur、Karl Anker Jørgensen
DOI:10.1021/acs.orglett.6b00852
日期:2016.5.6
The stereoselective [3 + 2] cycloaddition between vinylcyclopropanes and α,β-unsaturated aldehydes promoted by combined palladium and organocatalysis is disclosed. The unique synergistic catalytic system allows for the stereoselective formation of highly substituted cyclopentanes with up to four stereocenters in high yields and selectivities. Vinylcyclopropanes with two different geminal substituents
公开了在乙烯基环丙烷与通过钯和有机催化的结合促进的α,β-不饱和醛之间的立体选择性[3 + 2]环加成。独特的协同催化系统可以高产率和高选择性地立体选择性地形成具有四个立体中心的高度取代的环戊烷。具有两个不同的双取代基的乙烯基环丙烷有助于形成含有季立体中心的环戊烷。此外,已开发的反应在克量级上表现良好,并且证明了许多转化。