Gold-Catalyzed Regio- and Stereoselective α-Acyloxy-β-Alkynylation of Ynol Ethers
作者:Yaowen Liu、Chunyu Han、Hongwei Shi、Alexandra V. Mackenroth、Linghua Zhang、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1021/acs.joc.2c02597
日期:2023.3.3
sciences. Herein, the synthesis of tetra-substituted enol ester 2-iodobenzoate derivatives was achieved in good yields at room temperature through a gold-catalyzed acyloxyalkynylation of sensitive ynol ethers with ethynylbenziodoxolones (EBXs), the latter acting as bifunctional reactants. The conversion is highly regioselective with a broad substrate scope. Mechanistically, an Au(III) species is the key
烯醇酯和共轭烯炔是合成化学和材料科学中有价值的结构基序。在此,四取代烯醇酯 2-碘苯甲酸酯衍生物的合成在室温下通过金催化的敏感炔醇醚与乙炔基苯并异氧酮 (EBX) 的酰氧基炔基化反应以良好的产率实现,后者充当双功能反应物。该转化具有高区域选择性,底物范围广。从机理上讲,Au(III) 物种是 Au(I)/Au(III) 氧化还原循环的关键中间体。该反应在合成上很有用,可以很容易地放大到克级。