Silver‐Catalyzed Halochalcogenation of Terminal Alkynols to Access Halogenated Selenonaphthalenes

Herein, we report an AgNO3 and FeCl3 relay‐catalyzed halogenation and electrophilic selenium cyclization reaction. This reaction is based on the trifunctionalization of terminal alkynols using NBS and diorganyl diselenides, providing a step‐efficient synthetic approach to produce halogenated selenonaphthalene derivatives in good yields. Furthermore, the halochalcogenation and cyclization reaction offers an efficient protocol for constructing molecules with two independent reactive centers.