Lewis Acid Catalyzed Procedure for Selective Conversion of the Carbocyclic Diels-Alder Adducts of Danishefsky's Diene to 2-Cyclohexenones and Its Extension to Their One-Pot Syntheses
Pyridines and fused pyridines are accessible by a combination of a Lewis acid-catalyzed multicomponent reaction and aromatization involving loss of a 2-furylmethyl chain.