Synthesis of Benzoazepinones Derivatives via Photoredox Deaminative Radical Cascade Alkylation of 1,7-dienes and 1,7-enynes

A deaminative alkyl radical cascade cyclization of 1,7-dienes is described under visible-light photocatalysis. This method delivers a family of benzazepinones and occurs under mild reaction conditions to access a broad substrate scope, with excellent functional group tolerance, and good yields. This protocol has also been extended to 1,7-enynes, furnishing a representative collection of cyclopentaquinolinones.