Self‐photocatalyzed Homolytic Dehalogenative Alkylation/Cyclization of Unactivated Alkenes Based on the Quinazolinone Skeleton via Energy Transfer

A mild, external photocatalyst‐ and additive‐free protocol for photo‐induced alkylation/cyclization of unactivated alkenes with halides has been developed. This strategy showed excellent regioselectivity and simple operation to synthesize alkyl‐substituted quinazolinones with a broad substrate scope. More importantly, chlorinated alkanes were also compatible with this transformation. A mild, external photocatalystand additive‐free protocol for photo‐induced alkylation/cyclization of unactivated alkenes with halides has been developed.