AgOTf-Catalyzed Aza-Diels–Alder Reactions of Danishefsky's Diene with Imines in Water



Aza-Diels–Alder reactions of Danishefsky's diene with imines in water took place smoothly in the presence of a catalytic amount of silver triflate to afford dihydro-4-pyridones in high yields. The silver triflate-catalyzed three-component reactions starting from aldehydes, amines, and Danishefsky's diene were also performed efficiently. In the three-component reactions with benzaldehyde, the addition of a non-ionic surfactant was found to be effective.