Synthesis of Alkenylboronates from <i>N</i>-Tosylhydrazones through Palladium-Catalyzed Carbene Migratory Insertion
作者:Yifan Ping、Rui Wang、Qianyue Wang、Taiwei Chang、Jingfeng Huo、Ming Lei、Jianbo Wang
DOI:10.1021/jacs.1c02331
日期:2021.7.7
The palladium-catalyzed oxidative borylation reaction of N-tosylhydrazones has been developed. The reaction features mild conditions, broad substrate scope, and good functional group tolerance. It thus represents a highly efficient and practical method for the synthesis of di-, tri-, and tetrasubstituted alkenylboronates from readily available N-tosylhydrazones. One-pot Suzuki coupling and other transformations
已经开发了钯催化的N-甲苯磺酰腙的氧化硼化反应。该反应具有条件温和、底物范围广、官能团耐受性好等特点。因此,它代表了一种从容易获得的N-甲苯磺酰腙合成二、三和四取代的烯基硼酸酯的高效和实用的方法。一锅 Suzuki 耦合和其他转换突出了该方法的综合效用。DFT 计算表明,钯-卡宾的形成和随后的硼基迁移插入是催化循环中的关键步骤。在三取代的链烯基硼酸酯形成过程中观察到的高立体选择性可以通过变形相互作用分析和 NBO 分析来解释。