Palladium-Catalyzed Double Alkylation of 3-Aryl-2-fluoroallyl Esters with Malonate Nucleophiles through the Carbon–Fluorine Bond Cleavage
摘要:
The alkylation of (Z)-3-aryl-2-fluoroallyl acetate with the malonate anion by the [Pd(C3H5)(cod)]BF4/2,2'-bpy catalyst proceeds through the carbon fluorine bond cleavage, and 2 equiv of the malonate nucleophile was introduced to the allyl substrate.
Palladium-catalyzed intermolecular coupling of 2-haloallylic acetates with simple phenols, and sequential formation of benzofuran derivatives through the intramolecular cyclization
synthesis of 2-substituted benzofuran derivatives by the palladium-catalyzed reaction of 2-haloallylic acetates with simple phenols in the presence of a base. The reaction proceeded through the intermolecular attack of the nucleophile on the central carbon atom of the π-allyl group, carbon-halogen bond cleavage, and sequential intramolecularcyclization.
The palladium-catalyzed hydroalkylation of 2-fluoroallyl acetates with the malonate anion and hydride was developed. The reaction proceeded through the C–F bond activation and provided vinylmalonic acid ester derivatives by the regioselective substitutions with the carbon nucleophile and hydride.
The double substitution of 3-aryl-2-fluoroallyl acetates with phenols has been accomplished; the Pd(PPh3)(4) catalyst system has effectively catalyzed the reaction to afford the doubly substituted product via carbon-fluorine bond activation.