New Fused Chalcogen/Nitrogen Heterocycles from the Reaction of (Halochalcogenyl)hetarenes with Pentene

Abstract 2-(Halochalcogenyl)pyridines, 2-(halosulfanyl)quinolines, 2-(halosulfanyl)pyrimidines, and 2-(halo­sulfanyl)-1,3-benzothiazoles reacted with pent-1-ene through regioselective formation of anti-Markovnikov electrophilic addition products and subsequent ring closure. Based on these reactions, high-yielding methods for the synthesis of new fused heterocyclic compounds were developed.