Regioselective Radical Borylation of α,β-Unsaturated Esters and Related Compounds by Visible Light Irradiation with an Organic Photocatalyst
作者:Guosong Li、Guanwang Huang、Ruixia Sun、Dennis P. Curran、Wen Dai
DOI:10.1021/acs.orglett.1c01270
日期:2021.6.4
recently been reported and are still rare. Here we describe a photoredox radical hydroboration of α,β-unsaturated esters, amides, ketones, and nitriles with NHC-boranes that uses only an organocatalyst and visible light. The conditions are mild, the substrate scope is broad, and the α/β regioselectivity is high. The reaction requires only the organocatalyst; there is no costly metal, and there are no
自由基硼氢化反应直到最近才被报道并且仍然很少见。在这里,我们描述了 α,β-不饱和酯、酰胺、酮和腈与 NHC-硼烷的光氧化还原自由基硼氢化反应,该反应仅使用有机催化剂和可见光。条件温和,底物范围广,α/β区域选择性高。该反应只需要有机催化剂;没有昂贵的金属,也没有其他添加剂(碱、助催化剂、引发剂)。