The ketene N-imidoylimines 12 are shown to be transitory intermediates formed by the reaction of isocyanides with sulfides 1 or by the reaction of imino chloro sulfides with sodium salts of a-cyano esters 3. When the nitrogen atom of the imidoyl group bears a primary or secondary substituent, the ketene imines 12 are converted into diazatrienes 13 by a very fast 1, 5-migration of the hydrogen atom of the imidoyl group. Diazatrienes 13 that bear a ...
