(4-Cyanooxazol-5-ylamino)acetates and (4-cyanooxazol-5-ylamino)acetamides after treatment with trifluoroacetic acid undergo recyclization to the mixture of corresponding 5-aminooxazoles, 5-trifluoroacetylaminooxazoles, and oxazolopyrimidinones. The structures have been confirmed for certain products which have been isolated in pure form.
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Published in Khimiya Geterotsiklicheskikh Soedinenii, 2023, 59(6/7), 521–524
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Shablykin, O.V., Merzhyievskyi, D.O., Brovarets, V.S. et al. New oxazole to oxazole recyclization. Chem Heterocycl Comp 59, 521–524 (2023). https://doi.org/10.1007/s10593-023-03226-7
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DOI: https://doi.org/10.1007/s10593-023-03226-7