Visible Light-Induced Selective Generation of Radicals from Organoborates by Photoredox Catalysis
作者:Yusuke Yasu、Takashi Koike、Munetaka Akita
DOI:10.1002/adsc.201200588
日期:2012.12.14
A new strategy for the generation of carbon-centered radicals via oxidation of alkyl-, allyl-, benzyl- and arylborates by visible-light-driven single electron transfer (SET) photoredox catalysis has been established. The generated radicals smoothly react with TEMPO and electron-deficient alkenes to afford CO and CC coupling products, respectively. In this radical initiating system, cyclic organo(triol)borates
碳中心自由基的生成的新策略经由通过可见光驱动单电子转移(SET)photoredox催化烷基- ,烯丙基- ,苄基-氧化arylborates和已经建立。产生的自由基与TEMPO和缺电子的烯烃平稳反应,分别提供CO和CC偶联产物。在该自由基引发体系中,环状有机(三醇)硼酸酯被证明是有用的自由基前体。