A highly efficient hydroxylation of (hetero)aryl halides using water as a hydroxyl source via Ni catalysis promoted by PhSiH3 under thermal catalysis is reported. This methodology provides a general procedure to obtain diverse multifunctional pharmaceutically phenols and polyphenols, some of which are proven challenging to be synthesized using literature methods. Mechanism studies demonstrated that
Electrochemical‐induced 1,3‐oxohydroxylation of arylcyclopropanes
作者:Xuejin Huang、Jianhua Cai、Ye Zheng、Chunlan Song、Jiakun Li
DOI:10.1002/adsc.202301343
日期:2024.1.30
Herein, we present a method for electrochemical-induced 1,3-oxohydroxylation of arylcyclopropanes with H2O as the green oxygen source. This transformation offers a regioselective route to highly functionalized β-hydroxy ketones under oxidant- and metal-free conditions. Notably, this electrochemical approach features simple operation, good regioselectivity, high functional group tolerance, and easy
在此,我们提出了一种以 H 2 O 作为绿色氧源电化学诱导芳基环丙烷 1,3-氧代羟基化的方法。这种转化为在无氧化剂和无金属条件下制备高度功能化的β-羟基酮提供了一条区域选择性途径。值得注意的是,该电化学方法具有操作简单、区域选择性好、官能团耐受性高、产物易于衍生化等特点。机理研究提供了确凿的证据,证明 1,3-二醇是该反应中的关键中间体,导致观察到的区域选择性。
Palladium‐catalyzed sequential Heck/Suzuki coupling reaction and the synthesis of diarylmethanes in aqueous media using indole‐based N‐heterocyclic carbene precursors
作者:Yu‐Ming Hsu、Yi‐Wen Hua、Ying‐Yueh Wang、Ta‐Jung Lu、Dong‐Sheng Lee
DOI:10.1002/jccs.202400115
日期:2024.7
indole-based benzimidazolium salts, demonstrated remarkable efficiency. It accomplished the synthesis of diarylmethanes via the Suzuki coupling of benzyl chlorides and arylboronic acids in aqueous media with a Pd loading of 0.5 mol%. Furthermore, it successfully achieved the one-pot sequential Heck/Suzuki coupling reactions with a Pd loading of as low as 0.25 mol%.