Electrochemical synthesis of PhSe/CF3-containing dibenzazepines via radical cascade cyclization of alkynes†

A green and simple electrochemical method for the synthesis of PhSe/CF₃-containing dioxodibenzothiazepines has been developed via radical cascade cyclization of alkynes. This transformation provides a novel approach for the synthesis of 7-membered heterocycles without the addition of any external catalyst or oxidant under mild reaction conditions. A gram-scale experiment demonstrated the practicality of this transformation.