Copper‐Catalyzed and Proton‐Directed Selective Hydroxymethylation of Alkynes with CO
<sub>2</sub>
作者:Mei‐Yan Wang、Xin Jin、Xiaofei Wang、Shumei Xia、Yue Wang、Shouying Huang、Ying Li、Liang‐Nian He、Xinbin Ma
DOI:10.1002/anie.202012768
日期:2021.2.19
strategy for copper‐catalyzed hydroxymethylation of alkynes with CO2 and hydrosilane was developed. Switched on/off a proton source, for example, tBuOH, direct hydroxymethylation and reductive hydroxymethylation could be triggered selectively, delivering a series of allylic alcohols and homobenzylic alcohols, respectively, with high levels of Z/E, regio‐ and enantioselectivity. Such a selective synthesis
提出了一种用CO 2和氢硅烷对炔烃进行铜催化的羟甲基化的有趣策略。开启/关闭质子源(例如t BuOH)时,可以选择性地触发直接羟甲基化和还原性羟甲基化,分别提供一系列Z / E,区域和对映选择性高的烯丙基醇和高苄基醇。这种选择性合成归因于乙烯基铜中间体对质子和CO 2的响应差异。已证明乙烯基铜物质的质子化在羟甲基化之前,因此允许在合适的质子存在下从直接炔烃羟甲基化转移至还原性羟甲基化。