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The reactivity of α-azidochalcones has been explored for the preparation of highly substituted oxazoles via a 2 H -azirine intermediate. The azidochalcones, when treated with potassium thiocyanate in the presence of potassium persulfate, lead to 2,4,5-trisubstituted oxazoles in good yields. Incidentally, 2-aminothiazoles are the products when ferric nitrate is employed instead of persulfate in the above reaction.

Access to highly substituted oxazoles by the reaction of α-azidochalcone with potassium thiocyanate