Photoredox‐Catalyzed Isomerization of Highly Substituted Allylic Alcohols by C−H Bond Activation
作者:Kai Guo、Zhongchao Zhang、Anding Li、Yuanhe Li、Jun Huang、Zhen Yang
DOI:10.1002/anie.202000743
日期:2020.7.6
Photoredox‐catalyzed isomerization of γ‐carbonyl‐substituted allylic alcohols to their corresponding carbonyl compounds was achieved for the first time by C−H bond activation. This catalytic redox‐neutral process resulted in the synthesis of 1,4‐dicarbonyl compounds. Notably, allylic alcohols bearing tetrasubstituted olefins can also be transformed into their corresponding carbonyl compounds. Density
γ-羰基取代的烯丙醇的光氧化还原催化异构化为其相应的羰基化合物是首次通过CH键进行活化。这种催化的氧化还原中性过程导致了1,4-二羰基化合物的合成。值得注意的是,带有四取代烯烃的烯丙基醇也可以转化成它们相应的羰基化合物。密度泛函理论计算表明,烯丙醇的γ位上的羰基有利于形成具有较高垂直电子亲和力的相应烯丙基醇自由基,这有助于完成光氧化还原催化循环。