The Barbier-Grignard-Type Arylation of Ketones and Unexpected Cross-Coupling of Phenolic Ketones using Unactivated Aryl Bromides
作者:Yunming Wen、Guifang Chen、Shiqiang Huang、Yu Tang、Jun Yang、Yuanming Zhang
DOI:10.1002/adsc.201500743
日期:2016.3.17
ketones and an unexpected cross‐coupling of phenolic ketones was observed using unactivated bromides and magnesium in tetrahydrofuran/toluene at 96 °C promoted by multicatalysts of cupric bromide (15 mol%), bismuth chloride (5 mol%) and silver bromide (10 mol%). The substituent and electronic effects on the reaction have been discussed. High yields of arylation and cross‐coupling have been attained under
已开发出一种新颖,高度通用且高效的方法,用于酮的Barbier-Grignard型芳基化,并在96°C下使用未活化的溴化物和镁在四氢呋喃/甲苯中的未活化溴化物和镁在铜的多催化剂促进下观察到了酚酮的意外交叉偶联。溴化物(15摩尔%),氯化铋(5摩尔%)和溴化银(10摩尔%)。已经讨论了取代基和对反应的电子作用。在温和条件下,芳构化和交叉偶联的收率很高。提出了一种新颖的涉及醌中间体的合理机理。与酚酮的羟基交叉偶联的高化学选择性应有助于酮找到新的应用。