Dinuclear-gold-catalyzed cyclization of 1,7-enynes with alkyl bromides

Dinuclear-gold-catalyzed radical difunctionalization of alkyl bromides with 1,7-enynes has been established dehalogenation and 1,5-HAT processes. This protocol was used to construct, in a facile and efficient manner, a wide range of cyclopenta[]quinolines bearing two quaternary carbon centers with good yields (28 examples, up to 84% yield). The good functional group compatibility and gram-scale preparation ability of the reaction proved its synthetic robustness.