A synthesis of dispiro derivatives from 5-methylidene-2-chalcogenimidazolones and azomethine ylides generated from isatins and N-substituted α-amino acids has been developed.
Keywords: 1,3-dipolar cycloaddition; 5-methylidene-2-chalcogen-imidazolones; azomethine ylides; dispiro derivatives.
© 2022 The Authors.