Visible-light-induced synthesis of 6H-benzo[c]chromene and dihydrophenanthridine derivatives
An intramolecular C—H arylation reaction was established for the construction of a series of 6 H-benzo[c]chromene and dihydrophenanthridine derivatives under visible light irradiation.The prod-ucts were characterized by 1 H NMR and 13 C NMR spectra.Compared with traditional methods,this method uses clean and renewable light energy to drive reactions,avoiding strict reaction conditions such as high temperature and high pressure.In addition,this method has the advantages of easily a-vailable starting materials,broad substrate scopes,mild reaction conditions and simple operation.