Alcohol Etherification via Alkoxy Radicals Generated by Visible-Light Photoredox Catalysis
作者:Alexandra R. Rivero、Peter Fodran、Alica Ondrejková、Carl-Johan Wallentin
DOI:10.1021/acs.orglett.0c03058
日期:2020.11.6
A mechanistically divergent method is described that, employing a commercially available hypervalent iodine(III) reagent, generates alkoxy radicals from 1°, 2°, and 3° alcohols and allows their use in the functionalization of C(sp3)–H and C(sp2)–H bonds. This visible-light photoredox catalysis produces alkyl ethers via 1,5/6-hydrogen atom transfer or aryl ethers via 1,5-addition. This mild methodology
描述了一种机械发散的方法,该方法使用市售的高价碘(III)试剂,可从1°,2°和3°醇生成烷氧基,并允许它们用于C(sp 3)–H和C的官能化(sp 2)–H键。这种可见光的光氧化还原催化反应通过1,5 / 6-氢原子转移生成烷基醚,或通过1,5-加成生成芳基醚。这种温和的方法为乙缩醛,原酸酯,四氢呋喃和苯并二氢吡喃的合成提供了实用的策略。