A highly stereoselective triple dominoreaction for the synthesis of functionalized tricyclic chromane scaffolds has been developed. A secondary amine-catalyzed domino Michael/Michael/aldol condensation reaction between aliphatic aldehydes, nitro-chromenes, and α,β-unsaturated aldehydes leads to the formation of synthetically important tricyclic chromanes bearing four contiguous stereogenic centers
已经开发出用于合成官能化的三环苯并二氢吡喃骨架的高度立体选择性的三重多米诺反应。脂族醛,硝基色烯和α,β-不饱和醛之间的仲胺催化的多米诺Michael / Michael / aldol缩合反应导致形成重要的具有三个连续立体中心的合成重要的三环苯并二氢吡喃中心,包括收率高的四取代碳( 20–66%)和出色的立体选择性(> 20:1 dr和> 99%ee)。
作者:Mukesh Kumar、Pankaj Chauhan、Stephen J. Bailey、Ehsan Jafari、Carolina von Essen、Kari Rissanen、Dieter Enders
DOI:10.1021/acs.orglett.8b00175
日期:2018.2.16
An efficient and highly stereoselective one-pot, four-component synthesis of functionalized tricyclic chromanes has been achieved through an organocatalyzed quadruple dominoreaction. The reaction sequence involves an oxa-Michael/Michael/Michael/aldol condensation between alcohols, 2 equiv of acrolein, and nitrochromenes to generate the pharmaceutically important tricyclic chromanes bearing three contiguous
通过有机催化的四重多米诺反应,已实现了高效且高度立体选择性的一锅四组分官能化三环苯并吡喃的合成。反应顺序包括在醇,2当量的丙烯醛和硝基色酮之间进行oxa-Michael / Michael / Michael / aldol缩合反应,以产生药学上重要的三环苯并三环苯并烷,其中包括三个连续的立体异构中心,包括手性四取代碳中心,具有良好的多米诺产量(30– 70%)和出色的非对映选择性和对映选择性(> 20:1 dr和> 99%ee)。