作者:Jing Meng、Wei-Wei Ding、Zhi-Yong Han
DOI:10.1021/acs.orglett.9b03227
日期:2019.12.20
The first asymmetric Wolff rearrangement reaction that directly converts α-diazoketones into broadly useful chiral α,α-disubstituted carboxylic esters with high enantioselectivities (up to 97.5:2.5 er) is reported. The cascade reaction proceeds through the seamless combination of visible-light-induced formation of the ketene intermediate and asymmetric ketene esterification using a readily available
报道了第一个不对称的Wolff重排反应,该反应将α-二氮酮直接转化为具有高对映选择性(高达97.5:2.5 er)的广泛使用的手性α,α-二取代的羧酸酯。级联反应通过使用可见的苯并四咪唑型催化剂将可见光诱导的乙烯酮中间体的形成与不对称的乙烯酮酯化反应无缝结合而进行。