Transient and Recyclable Halogenation Coupling (TRHC) for Isoflavonoid Synthesis with Site‐Selective Arylation
作者:Jie‐Ping Wan、Zhi Tu、Yuyun Wang
DOI:10.1002/chem.201901025
日期:2019.5.17
designed for the synthesis of isoflavonoids through the domino reactions of o‐hydroxyphenyl enaminones and aryl boronic acids in the presence of catalytic KI and Pd catalyst. Instead of the conventional cross‐coupling strategy employing pre‐halogenated substrates, this method transforms raw C−H bond by means of a transient C−H halogenation to smoothly relay the subsequent C‐arylation. Consequently, such
已设计了一种瞬态可回收的CH碘化反应,用于在催化KI和Pd催化剂存在下,通过邻羟基苯烯键烯酮和芳基硼酸的多米诺反应来合成异黄酮。代替使用预卤化底物的常规交叉偶联策略,该方法通过瞬态CH卤化来转化原始的CH键,以平滑地中继后续的CH芳构化。因此,这种方法避免了C-卤素键安装的预功能化以及交叉偶联产物后化学计量的含卤素废物的产生,从而揭示了一种有趣的新偶联方案,可在原始处建立C-C键。经典CX(X =卤素)键交叉偶联与CH活化之间的区域。