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Reaction of 5-Substituted tetrazoles with trifluoroacetic anhydride

✍ Scribed by L. I. Vereshchagin; O. N. Verkhozina; F. A. Pokatilov; S. K. Strunevich; A. G. Proidakov; V. N. Kizhnyaev

Book ID
111464520
Publisher
SP MAIK Nauka/Interperiodica
Year
2007
Tongue
English
Weight
80 KB
Volume
43
Category
Article
ISSN
1070-4280

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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 (