Furan-2-carbaldehydes as C1 building blocks for the synthesis of quinazolin-4(3H)-ones via ligand-free photocatalytic C–C bond cleavage

Abstract

Furan-2-carbaldehydes, as biomass-derived chemicals, are used as efficient green C1 building blocks to synthesize bioactive quinazolin-4(3H)-ones by ligand-free photocatalytic C–C bond cleavage. Notably, protection of hydroxyl, carboxyl, amide, or secondary amino groups is not required. Mechanistic studies suggest that conjugated N,O-tridentate copper complexes act as novel photoinitiators under visible light.