Alkene, Bromide, and ROH – How To Achieve Selectivity? Electrochemical Synthesis of Bromohydrins and Their Ethers
作者:Oleg V. Bityukov、Vera A. Vil'、Gennady I. Nikishin、Alexander O. Terent'ev
DOI:10.1002/adsc.202100161
日期:2021.6.21
Bromohydrins and their ethers were electrochemically synthesized via hydroxy- and alkoxybromination of alkenes using potassium bromide and water or alcohols. High selectivity of bromohydrins formation was achieved only with the use of DMSO as the solvent and an acid as the additive. The proposed combination of starting reagents, additives, and solvents allowed to form bromohydrins or their ethers selectively
溴醇及其醚是通过使用溴化钾和水或醇的烯烃的羟基和烷氧基溴化而电化学合成的。只有使用 DMSO 作为溶剂和酸作为添加剂才能实现溴醇形成的高选择性。尽管有多种副产物(环氧化物、二溴化物、二醇),所提议的起始试剂、添加剂和溶剂的组合允许选择性地形成溴醇或其醚。溴醇以高产率获得,高达 96%,在配备玻璃碳和高电流密度铂电极的未分割电化学电池中具有广泛的底物范围。