Zusammenfassung
Ortho-alkynylated alpha-bromocinnamates can be converted by a visible-light-mediated photocascade reaction with molecular oxygen into either indenones or dihydroindeno[1,2-c]chromenes. The one-step process features key photochemical steps, that is, the initial activation of vinyl bromides through energy transfer to give alpha-ketoradicals in a reaction with molecular oxygen, followed by ...
Zusammenfassung
Ortho-alkynylated alpha-bromocinnamates can be converted by a visible-light-mediated photocascade reaction with molecular oxygen into either indenones or dihydroindeno[1,2-c]chromenes. The one-step process features key photochemical steps, that is, the initial activation of vinyl bromides through energy transfer to give alpha-ketoradicals in a reaction with molecular oxygen, followed by alpha-oxidation of an arene moiety by 6-pi electrocyclization, and subsequent hydroxylation by an electron-transfer process from the same photocatalyst leads to the dihydroindeno[1,2-c]chromenes.
Altmetric