Visible-Light Promoted Regioselective Oxygenation of Quinoxalin-2(1<i>H</i>)-ones Using O<sub>2</sub> as an Oxidant
Sudip Sau, Prasenjit Mal
Abstract
A visible-light-mediated sustainable approach for metal-free oxygenation of quinoxalin-2(1H)-one by employing Mes-Acr-MeClO4 as a photocatalyst without using any additive or cocatalyst is reported here. O2 served as the eco-friendly and green oxidant source for this conversion. In addition, the protocol exhibited high regioselectivity and tolerance toward a broad spectrum of functional groups to furnish quinoxaline-2,3-diones in good to excellent yields.
Topics & Concepts
RegioselectivityChemistryQuinoxalineVisible spectrumOxygenationPhotocatalysisPhotochemistryCombinatorial chemistryGreen-lightOrganic chemistryCatalysisBlue lightOptoelectronicsEcologyBiologyPhysicsSynthesis and Biological EvaluationRadical Photochemical ReactionsOxidative Organic Chemistry Reactions