Publications [#234663] of Ross A. Widenhoefer

Journal Articles

  1. Li, H; Widenhoefer, RA, "Intramolecular Diamination and Alkoxyamination of Alkenes with N-Sulfonyl Ureas With N-Iodosuccinimide.", TetrahedronJune,, 2010, 66(26), 4827-4831 [21566674], [doi].
    (last updated on 2024/04/24)

    Abstract:
    Reaction of N-δ-alkenyl-N'-sulfonyl urea 1 with N-iodosuccinimde (NIS; 2 equiv) and a catalytic amount of AgOTf (20 mol %) at room temperature led to intramolecular alkoxyamination to form bicyclic isourea 2a in 95% isolated yield. In comparison, reaction of 1 with NIS and sodium bicarbonate (1 equiv) at room temperature led to isolation of bicyclic imidazolidin-2-one 2b in 91% yield. These NIS-mediated alkoxyamination and diamination protocols were effective for a range of N-δ-alkenyl-N'-sulfonyl ureas to form the corresponding heterobicyclic compounds in good yield with high chemoselectivity and good to excellent diastereoselectivity.