Asymmetric Diastereoselective Synthesis of Spirocyclopropane Derivatives of Oxindole
作者:Maksim Ošeka、Artur Noole、Sergei Žari、Mario Öeren、Ivar Järving、Margus Lopp、Tõnis Kanger
DOI:10.1002/ejoc.201402061
日期:2014.6
A new asymmetric organocatalytic synthesis of spirocyclopropane oxindoles has been developed. The method is based on the Michael addition of N-Boc-protected 3-chlorooxindole to unsaturated 1,4-dicarbonyl compounds, affording trans-substituted spirocyclopropane oxindole derivatives in high diastereo- and enantioselectivity.
开发了一种新的螺环丙烷羟吲哚的不对称有机催化合成方法。该方法基于 N-Boc 保护的 3-氯吲哚与不饱和 1,4-二羰基化合物的迈克尔加成,以高非对映选择性和对映选择性提供反式取代的螺环丙烷羟吲哚衍生物。