Copper-Catalyzed Enantioselective Decarboxylative Cyanation of Benzylic Acids Promoted by Hypervalent Iodine(III) Reagents
作者:Zhaoxia Li、Guang’an Zhang、Yue Song、Miaomiao Li、Zhongxian Li、Wei Ding、Junliang Wu
DOI:10.1021/acs.orglett.3c00816
日期:2023.5.5
directly decarboxylative cyanation reactions of common alkyl carboxylic acids remain largely elusive. Herein, we report a protocol for copper-catalyzed direct and enantioselective decarboxylative cyanation of benzylic acids. The in situ activation of acid substrates by a commercially inexpensive hypervalent iodine(III) reagent promoted the yield of the alkyl radicals under mild reaction conditions without
铜催化的不对称自由基氰化反应已成为快速构建 α-手性腈的有力策略。然而,普通烷基羧酸的直接脱羧氰化反应在很大程度上仍然难以捉摸。在此,我们报告了一种用于铜催化的苄酸直接和对映选择性脱羧氰化的方案。通过商业上廉价的高价碘 (III) 试剂原位激活酸性底物,在温和的反应条件下促进了烷基自由基的产率,而无需预官能化。结构多样的手性烷基腈以良好的收率和高对映选择性生产。此外,手性产物可以通过进一步的转化很容易地转化为其他有用的手性化合物。