Room temperature hydroamination of N-alkenyl ureas catalyzed by a gold(I) N-heterocyclic carbene complex

[GRAPHICS] Treatment of an N-4-pentenyl or N-5-hexenyl urea with a catalytic 1: 1 mixture of a gold(I) N,N-diarylimidazol-2-ylidine complex and AgOTf at or near room temperature leads to intramolecular exo-hydroamination to form the corresponding nitrogen heterocycle in excellent yield.