It Is “Thiazolidene-2-imine” and Not Imidazole-2-thione as the Reaction Product of 1-Benzoyl-3-phenylthiourea with Br₂/Enolizable Ketone^†

The products obtained by the reaction of benzoyl-3-phenylthioureas with bromine and enolizable ketones in the presence of triethylamine are not imidazole-2-thione derivatives as reported (Org. Lett. 2003, 5, 1657−1659) rather they are thiazolidene-2-imine derivatives.