Visible‐Light Photosynthesis of CHF2/CClF2/CBrF2‐Substituted Ring‐fused Quinazolinones in Dimethyl Carbonate

With eco‐friendly and sustainable CO2‐derived dimethyl carbonate as the sole solvent, the visible‐light‐induced cascade radical reactions have been established as a green and efficient tool for constructing various CHF2/CClF2/CBrF2‐substituted ring‐fused quinazolinones. A visible‐light‐enabled difluoromethylation and cascade cyclization alkenyl‐substituted quinazolinones is accomplished by using cheap and readily accessible CXF2CO2H as the CXF2 source. A range of CHF2/CClF2/CBrF2‐substituted ring‐fused quinazolinones with important functional groups were obtained in high yields.