Site Isolation in Metal–Organic Layers Enhances Photoredox Gold Catalysis
Haifeng Zheng, Yingjie Fan, Yang Song, Justin S. Chen, Eric You, Steven Labalme, Wenbin Lin
Abstract
-type photosensitizers and (phosphine)-AuCl catalysts for photoredox Au-catalyzed cross-coupling of allenoates, alkenes, or alkynes with aryldiazonium salts to afford furanone, tetrahydrofuran, or aryl alkyne derivatives, respectively. Site isolation of (phosphine)-AuCl complexes in Hf-Ru-Au prevents Au catalyst deactivation via ligand redistribution, Au(I) disproportionation, and aryl-phosphine reductive elimination, while the proximity between the Ru photosensitizers and Au catalysts enhances catalytic efficiency, with 14-200 times higher activity over those of the homogeneous controls in the cross-coupling reactions.
Topics & Concepts
ChemistryPhosphineArylCatalysisAlkyneTetrahydrofuranDisproportionationPhotochemistryCoupling reactionHomogeneous catalysisRedistribution (election)Photoredox catalysisLigand (biochemistry)MetalReductive eliminationCombinatorial chemistryMedicinal chemistryPolymer chemistryOrganic chemistryAlkylPhotocatalysisBiochemistryPolitical scienceLawPoliticsSolventReceptorCatalytic Alkyne ReactionsCatalytic C–H Functionalization MethodsNanocluster Synthesis and Applications