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(12) An elegant enantioselective synthesis of γ,δ-alkynyl amino acids
from azlactones was recently described by Ooi and co-workers:
Uraguchi, D.; Asai, Y.; Ooi, T. Angew. Chem., Int. Ed. 2009, 48, 733.
(13) In 1980, Steglich reported the treatment of azlactones with
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(14) Alkynyl(phenyl)iodonium salts and alkynyl-1,2-benziodoxol-3-
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(15) For recent reviews describing the reactivity of alkynyl(phenyl)
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