A visible light photoredox-catalyzed aldehyde olefin cyclization is reported. The method represents a formal hydroacylation of alkenes and alkynes and provides chromanol derivatives in good yields. The protocol takes advantage of the double role played by trialkylamines (NR3) which act as (i) electron donors for reducing the catalyst and (ii) proton donors to activate the substrate via a proton-coupled
报道了可见光光氧化还原催化的醛烯烃环化。该方法代表烯烃和
炔烃的正式加氢酰化,并以良好的收率提供色原醇衍
生物。该协议利用了
三烷基胺 (NR 3 ) 所起的双重作用,它们充当 (i) 电子供体以减少催化剂和 (ii) 质子供体通过质子耦合电子转移激活基板。