One Pot Continuous Reaction of Benzoin Condensation and Allylic Nucleophilic Substitution Using N-Heterocyclic Carbenes and Nickel(Ⅱ) Chloride as Catalysts

Abstract

With the presence of nickel(Ⅱ) chloride as metal complex catalyst and N-heterocyclic carbene as organic catalyst effective one pot synthesis of allylated α-hydroxy carbonyl compound in 78% yield was developed using benzaldehyde and cinnamyl acetate as precursors in potassium carbonate THF solution.The involved reactions during the continuous reaction are benzoin condensation and allylic nucleophilic substitution.