Activation of Chromium Catalysts by Photoexcited Hantzsch Ester for Decarboxylative Allylation of Aldehydes with Butadiene
Shuangjie Lin, Yuqing Chen, Huaipu Yan, Yonghong Liu, Yuchen Sun, Er‐Jun Hao, Caizhe Shi, Dandan Zhang, Nan Zhu, Lei Shi
Abstract
Metallaphotocatalysis often needs light-absorbing metal-polypyridyl complexes, semiconductors, or organic dyes, which can modify the oxidation state of metal catalysts. Here, we first report that photoexcitation of Hantzsch ester can directly activate chromium reagents through a single-electron transfer process. The synthetic application was demonstrated through a photoredox decarboxylative allylation of aldehydes with feedstock butadiene without exogenous photocatalysts, metallic reductants, or additives.
Topics & Concepts
ChemistryChromiumPhotoexcitationCatalysisPhotochemistryReagentMetal1,3-ButadieneElectron transferOrganic chemistryCombinatorial chemistryExcited stateNuclear physicsPhysicsRadical Photochemical ReactionsOxidative Organic Chemistry ReactionsCatalytic C–H Functionalization Methods