Chemoselective Installation of Diverse Succinimides on Fused Benzimidazoles via Rhodium-Catalyzed C–H Activation/Annulation: Chemosensor for Heavy Metals
Mohammad Aslam, Sonaimuthu Mohandoss, Yong Rok Lee
Abstract
A novel Rh-catalyzed cascade C–H activation/annulation of 2-arylbenzimidazoles with maleimides is reported. Rapid chemoselective access to two structurally distinct succinimide-bearing benzoimidazoisoquinolinones is achieved, depending on the acidic and basic conditions. This atom- and step-economic strategy features a wide substrate scope, excellent functional group tolerance, and site-specific functionalization. Application of the methodology yields a novel benzimidazole-based probe as a fluorescent chemosensor for the nanomolar detection of Hg2+, Cu2+, and Fe3+ ions.
Topics & Concepts
SuccinimidesChemistryAnnulationBenzimidazoleSuccinimideRhodiumCatalysisCombinatorial chemistryChemoselectivitySurface modificationFunctional groupFluorescenceSubstrate (aquarium)Organic chemistryOceanographyPolymerPhysical chemistryPhysicsGeologyQuantum mechanicsCatalytic C–H Functionalization MethodsCatalytic Cross-Coupling ReactionsAsymmetric Hydrogenation and Catalysis