A novel base-promoted domino Michael/O-alkylation reaction of maleimides with γ-halogenated-β-ketoesters is described. A variety of new succinimide-substituted 3(2H)-furanones were obtained in excellent yields (up to 96%) under simple and mild conditions. The structure of the new compound 3a was determined by singlecrystal X-ray analysis and a reaction pathway is proposed.