Visible-light-induced organophotocatalytic and singlet oxygen-initiated domino construction of 1,4-dihydropyridines, C-3 functionalized spiro[indoline-3,4′-pyridines] and C-11 functionalized spiro[indeno-[1,2-<i>b</i>]quinoxaline-11,4′-pyridines]
Biplob Borah, Mihir Patat, Vipin Singh, Murugesan Sivaprakash, Madavi S. Prasad, L. Raju Chowhan
Abstract
rose bengal photoredox catalysis under blue LED irradiation in an aqueous medium at room temperature has been developed. The products were isolated in excellent yields within a short reaction time for a variety of functional groups under transition metal- and ligand-free energy-efficient conditions in a green solvent system with high reaction mass efficiency and process mass intensity, which are the key advantages of the current work.
Topics & Concepts
ChemistryIndolineQuinoxalineCatalysisSinglet oxygenPhotochemistryCombinatorial chemistryTransition metalAqueous solutionRose bengalOrganic chemistryOxygenSynthesis and Biological EvaluationCatalytic C–H Functionalization MethodsOxidative Organic Chemistry Reactions