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Reaction of trifluoroacetic anhydride with 4-pyridinecarboxylic acid hydrazide

✍ Scribed by O. V. Voskresenskaya; R. I. Tarasova; M. B. Gazizov; Sh. A. Fattakhov

Book ID
111460968
Publisher
Springer
Year
2011
Tongue
English
Weight
133 KB
Volume
81
Category
Article
ISSN
1070-3632

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Reaction of tryptophan with trifluoroace
Reaction of tryptophan with trifluoroacetic anhydride
✍ Jan Bergman; GΓΆran Lidgren πŸ“‚ Article πŸ“… 1989 πŸ› Elsevier Science 🌐 French βš– 226 KB

Trifluoroacetic anhydride {TFAA) in ether quickly (= 5-10 min) converted tryptophau to the crystalline 2-trifluoromethyl-5(4@-oxazolone (2) without racemization. Dissolution of optically active 2 in acetonitrile gave racemic 2, whereas treatment with hot aqueous dioxane gave the isomeric oxazolone (