Manganese Dioxide-Mediated Oxidative Coupling of 1,3-Dicarbonyl Compounds with α,β-Unsaturated Ketones: Direct Access to 3,4-Dicarbonyl Substituted Furans
AbstractAn efficient manganese dioxide‐mediated and highly selective oxidative CH/CH functionalization of 1,3‐dicarbonyl compounds with α,β‐unsaturated ketones for the construction of tetrasubstituted furans in one step has been demonstrated. This catalytic system converts two CH bonds and CO bonds to CC and CO bonds. This reaction provides a facile and regio‐defined method for the synthesis of 3,4‐dicarbonyl substituted furans.magnified image
Direct CuO nanoparticle-catalyzed synthesis of poly-substituted furans via oxidative C–H/C–H functionalization in aqueous medium
Here, we have reported synthesis of 3,4-dicarbonyl substituted poly-functionalized furan derivatives via direct functionalization of α,β-unsaturated carbonyl compounds through conjugate addition initiated dominoreactions using CuO nanoparticles as a reusable catalyst in aqueous ethanol.