A nonmetal-catalyzed oxidative cyclization to achieve 2,5-disubstituted oxazoles from inexpensive and readily available substituted chalcone, (diacetoxyiodo)benzene (PIDA) and ammonium acetate (NH₄OAc) at room temperature is described. The reaction forms a variety of 2,5-diaryloxazoles in good to excellent yields with broad substrate scope under mild conditions without the requirement of ligands and additional bases.

中文翻译：

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无金属碘（iii）促进2,5-二芳基恶唑的合成†

描述了在室温下由廉价且容易获得的取代的查耳酮，（二乙酰氧基碘）苯（PIDA）和乙酸铵（NH ₄ OAc）实现2,5-二取代的恶唑的非金属催化的氧化环化。该反应在温和条件下以不需要的配体和额外的碱即可以良好的产率和优异的产率形成各种2,5-二芳基恶唑，具有广泛的底物范围。