Asymmetric Organocatalytic Cyclopropanation - Highly Stereocontrolled Synthesis of Chiral Cyclopropanes with Quaternary Stereocenters
作者:Xavier Companyó、Andrea-Nekane Alba、Francisco Cárdenas、Albert Moyano、Ramon Rios
DOI:10.1002/ejoc.200900209
日期:2009.6
A convenient and novel domino reaction for the synthesis of highly functionalized cyclopropanes is reported. The addition of 2-bromoketo esters to a variety of ?,?-unsaturated aldehydes catalyzed by secondary amines leads to chiral cyclopropanes with three stereogenic carbon atoms, including one quaternary stereocenter, in a highly stereocontrolled fashion.
报告了一种用于合成高度官能化环丙烷的方便且新颖的多米诺骨牌反应。将 2-溴酮酯加成到由仲胺催化的各种α,β-不饱和醛中,以高度立体控制的方式产生具有三个立体碳原子(包括一个季立体中心)的手性环丙烷。