Pd-catalyzed synthesis of 1-(hetero)aryl-2,2,2-trichloroethanols using chloral hydrate and (hetero)arylboroxines
作者:Minori Shimizu、Yuta Okuda、Koki Toyoda、Ryo Akiyama、Hiraku Shinozaki、Tetsuya Yamamoto
DOI:10.1039/d1ra02403e
日期:——
1-(Hetero)aryl-2,2,2-trichloroethanols are useful key intermediates for the synthesis of various bioactive compounds. Herein, we describe N-heterocyclic carbene (NHC)-coordinated cyclometallated palladium complex (CYP)-catalyzed (hetero)aryl addition of chloral hydrate using (hetero)arylboroxines, providing a new approach to 1-(hetero)aryl-2,2,2-trichloroethanols. Notably, PhS-IPent-CYP which coordinated
1-(杂)芳基-2,2,2-三氯乙醇是合成各种生物活性化合物的有用的关键中间体。在此,我们描述了使用(杂)芳基环硼氧烷进行N-杂环卡宾(NHC)配位的环金属钯配合物(CYP)催化的水合氯醛的(杂)芳基加成反应,为1-(杂)芳基-2,2的合成提供了一种新方法。 ,2-三氯乙醇。值得注意的是,PhS-IPent-CYP 协调大而灵活的 2,6-二(戊-3-基)苯胺(IPent)基 NHC,表现出良好的催化活性,并促进了 24-97% 产率的转化。