Аннотация:New type dispiroindolinones, dispiroimidazolidine-4,3′-pyrrolidine-2′,3″-indolinones unsubstituted at position 4′ of the central pyrrolidine ring, were synthesized by the 1,3-dipolar cycloaddition of azomethine ylides, generated from N-alkyl-substituted amino acids and isatines, to 5-methylidene-substituted 3-phenylhydantoin.