Photoredox C(<i>sp</i><sup>3</sup>)−C(<i>sp</i><sup>3</sup>) Cross‐Dehydrogenative Coupling of Xanthene with β‐keto Moiety using MoS<sub>2</sub> Quantum Dot (QD) Catalyst.
Jiteshkumar P. Deore, Mrinmoy De
Abstract
Abstract Visible light‐mediated Cross‐Dehydrogenative Coupling of Xanthene with β‐keto moieties has been developed using MoS 2 Quantum Dot (QD) as a photoredox catalyst. Interesting features of this strategy includes circumventing the requisite of pre‐functionalized starting material, broad substrate scope, mild reaction condition, water as a solvent system, and recyclability of catalyst up to six cycles without loss of yield and selectivity. We have also enlightened the Kinetic Solvent Isotope Effect (KSIE) by scrutinizing the aspect of triplet‐to‐triplet photo energy transfer. The reductive quenching mechanism of QD photocatalyst has been endorsed by cyclic voltametric study. magnified image
Topics & Concepts
XantheneChemistryCatalysisMoietyPhotochemistryQuenching (fluorescence)Quantum yieldQuantum dotSubstrate (aquarium)SolventYield (engineering)Homogeneous catalysisFluorescenceNanotechnologyStereochemistryOrganic chemistryPhysicsMaterials scienceThermodynamicsQuantum mechanicsGeologyOceanographyAdvanced Photocatalysis TechniquesRadical Photochemical ReactionsSulfur-Based Synthesis Techniques