Abstract
In the presence of aluminum halide, benzeneseleninyl chloride is an efficient Regioselective halogenating reagent for heterocyclic compounds such as thiophene, 2methylthiophene. 3-methylthiophene, 2,5-dimethylthiophene, and furan. In the case of pyrrole, no halogenated product was obtained. A plausible reaction mechanism involving a positive halogen intermediate is proposed.