Highly Selective and Efficient Ring Hydroxylation of Alkylbenzenes with Hydrogen Peroxide and an Osmium(VI) Nitrido Catalyst
作者:Hoi-Ki Kwong、Po-Kam Lo、Shek-Man Yiu、Hajime Hirao、Kai-Chung Lau、Tai-Chu Lau
DOI:10.1002/anie.201705986
日期:2017.9.25
The OsVI nitrido complex, OsVI(N)(quin)2(OTs) (1, quin=2‐quinaldinate, OTs=tosylate), is a highly selective and efficient catalyst for the ring hydroxylation of alkylbenzenes with H2O2 at room temperature. Oxidation of various alkylbenzenes occurs with ring/chain oxidation ratios ranging from 96.7/3.3 to 99.9/0.1, and total product yields from 93 % to 98 %. Moreover, turnover numbers up to 6360, 5670
Os VI氮杂配合物Os VI(N)(quin)2(OTs)(1,quin = 2-喹啉酯,OTs =甲苯磺酸酯)是高度选择性和高效的催化剂,用于烷基苯与H 2 O 2的环羟基化在室温下。各种烷基苯的氧化反应发生的环/链氧化比为96.7 / 3.3至99.9 / 0.1,总产物产率为93%至98%。此外,对二甲苯,乙苯和均三甲苯的氧化可分别达到6360、5670和3880的周转率。密度泛函理论计算表明,活性中间体是Os VIII亚硝基氧代物种。