Intramolecular Nucleophilic Substitution at an sp2 Carbon: Synthesis of Substituted Thiazoles and Imidazole‐2‐thiones.

The nucleophilic substitution reactions of vinylic bromides with intramolecular thioamide or thiourea moieties proceed to give a series of substituted thiazoles and imidazole-2-thiones.