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. Click to show full abstract
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.
               
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