Lewis Acid Catalyzed Regiospecific Cross-Dehydrative Coupling Reaction of 2-Furylcarbinols with β-Keto Amides or 4-Hydroxycoumarins: A Route to Furyl Enols
Lewis acid-catalyzed directly dehydrative carbon-carbon bond formation reaction of 2-furylcarbinols with beta-keto amides provides a straight method for regioselective synthesis of (Z)-furyl-enols. Moreover, this Lewis acid-catalyzed cross-coupling reaction can be extended to an interesting heterocyclic version, featuring a functionalized 3-furyl-4-hydroxycoumarins synthesis.