Abstract
Polysubstituted oxazole derivatives are obtained through a regioselective gold‐catalyzed reaction of α‐alkynylamides and alkynoates in the presence of nitriles. The intermediary obtained gold carbenes are generated by alkyne oxidation with a pyridine N‐oxide. Acidic conditions ensure that only one of the two carbonyl oxygen atoms in these intermediates selectively cyclizes to the products in excellent yields.
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