Ferrocene-Mediated Photocatalytic Annulation of <i>N</i>-Sulfonyl Ketimines on a Polycrystalline WSe<sub>2</sub> Semiconductor Photocatalyst
Yuhan Lu, Chao Wu, Jia-Cheng Hou, Zhilin Wu, Min‐Hang Zhou, Xiaojun Huang, Wei‐Min He
Abstract
A merger of heterogeneous polycrystalline WSe 2 semiconductor photocatalysis and homogeneous ferrocene redox catalysis for the cascade radical coupling-annulation reactions was established. In the redox-mediated photocatalysis, ferrocene can improve the separation of photogenerated hole–electron pairs on WSe 2 by consuming the hole via the formation of a ferrocene cation, which triggered the molecular transformations. Various benzo[ e ]imidazo[1,5- c ][1,2,3]oxathiazine 5,5-dioxides were formed through semiheterogeneous three-component reaction of N -sulfonyl ketimines, N -arylglycines, and formaldehyde.
Topics & Concepts
PhotocatalysisFerroceneAnnulationSulfonylChemistryCatalysisRedoxPhotochemistryPhotoredox catalysisSemiconductorMaterials scienceOrganic chemistryElectrochemistryPhysical chemistryElectrodeAlkylOptoelectronicsSulfur-Based Synthesis TechniquesRadical Photochemical ReactionsCatalytic C–H Functionalization Methods