Preparation of tetrahydro-1H-xanthen-1-one and chromen-1-one derivatives via a Morita-Baylis-Hillman/oxa-Michael/elimination cascade
作者:Manoel T. Rodrigues、Hugo Santos、Lucas A. Zeoly、Deborah A. Simoni、Albert Moyano、Fernando Coelho
DOI:10.24820/ark.5550190.p011.133
日期:——
The Morita-Baylis-Hillman (MBH) reaction is a carbon-carbon bond forming transformation between an electrophile, typically an aldehyde, and an activated olefin. MBH adducts obtained from 2-hydroxybenzaldehydes and cyclic enones are potential substrates for the synthesis of xanthenone and chromenone derivatives. In this work, we investigated conditions to obtain tetrahydro-1H-xanthen-1-ones and chromen1-ones
Morita-Baylis-Hillman (MBH) 反应是亲电子试剂(通常是醛)和活性烯烃之间形成碳-碳键的转化。从 2-羟基苯甲醛和环烯酮获得的 MBH 加合物是合成呫吨酮和色烯酮衍生物的潜在底物。在这项工作中,我们研究了通过由双功能双环咪唑醇 (BIA) 催化的 Morita-Baylis-Hillman/oxa-Michael/消除级联反应直接获得四氢-1H-xanthen-1-ones 和 chromen1-ones 的条件。被证明是这种转变的有效催化剂。反应在室温下在水中进行,得到产率为 10-74% 的产物。