Visible-Light-Mediated Decarboxylative Radical Additions to Vinyl Boronic Esters: Rapid Access to γ-Amino Boronic Esters
作者:Adam Noble、Riccardo S. Mega、Daniel Pflästerer、Eddie L. Myers、Varinder K. Aggarwal
DOI:10.1002/anie.201712186
日期:2018.2.19
The synthesis of alkyl boronic esters by direct decarboxylative radical addition of carboxylic acids to vinyl boronic esters is described. The reaction proceeds under mild photoredox catalysis and involves an unprecedented single-electron reduction of an α-boryl radical intermediate to the corresponding anion. The reaction is amenable to a diverse range of substrates, including α-amino, α-oxy, and
描述了通过将羧酸直接脱羧基加成到乙烯基硼酸酯上来合成烷基硼酸酯。该反应在温和的光氧化还原催化下进行,涉及α-硼基自由基中间体前所未有的单电子还原成相应的阴离子。该反应适用于多种底物,包括α-氨基、α-氧基和烷基羧酸,从而提供了一种快速获取具有潜在生物学重要性的含硼分子的新方法。