Hantzsch Ester as a Visible‐Light Photoredox Catalyst for Transition‐Metal‐Free Coupling of Arylhalides and Arylsulfinates
作者:Da‐Liang Zhu、Qi Wu、Hai‐Yan Li、Hong‐Xi Li、Jian‐Ping Lang
DOI:10.1002/chem.201905281
日期:2020.3.18
(HEH) has been utilized as a visible-light photoredox catalyst for the cross coupling of arylhalides and arylsulfinates without transition metal, sacrificial agent, and mediator. This method is compatible with various functional groups and provides diaryl sulfones in good to high yields. Mechanistic studies indicate that this reaction undergoes the stepwise light irradiation of HE- , single electron
2,6-二甲基-1,4-二氢吡啶-3,5-二羧酸二乙酯(HEH)已用作可见光光氧化还原催化剂,用于芳族卤化物和芳基亚磺酸盐的交叉偶联,而无需过渡金属,牺牲剂和介体。该方法与各种官能团相容,并以高产率至高产率提供二芳基砜。机理研究表明,该反应经历了HE-的逐步光照射,施主-受体配合物(DAC)从* HE-到芳基卤的单电子转移(SET),亚磺酸盐捕获芳基和SET氧化砜自由基阴离子由他。通过DAC方法合成砜