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Cyclic enaminones were synthesized in high yields from amino acids in two steps via Wolff rearrangement. The cyclization represents a rare 6-exo-dig cyclization involving a ketene as an electrophile. No racemization was observed during this reaction.

Synthesis of Amino Acid Derived Enaminones via Wolff Rearrangement Using Vinylogous Amides as Carbon Nucleophiles