Ruthenium-Catalyzed Hydroamination of Aminoallenes: an Approach to Vinyl Substituted Heterocycles

Heterosubstituted aminoallenes underwent smooth ruthenium-catalyzed intramolecular exo-hydroamination reactions yielding the corresponding five-, six-, or seven-membered 1,3-diaza- or 1,3-oxaza-heterocyclic structures. This procedure is a valuable and less expensive alternative to the already known transition metal-catalyzed hydroamination reactions of aminoallenes.