An efficient synthesis of 2,5-disubstituted oxazoles via Co(III) catalysis is described herein. The synthesis is achieved under mild conditions through [3+2] cycloaddition of N-pivaloyloxyamides and alkynes. The reaction operates through an internal oxidation pathway and features a very broad substrate scope. The one-step synthesis of natural products such as texamine and balsoxin has been demonstrated via this protocol.

中文翻译：

---

通过钴（III）催化的N-新戊酰氧基酰胺和炔烃的交叉偶联反应合成2,5-二取代的恶唑

本文描述了通过Co（III）催化的2，5-二取代的恶唑的有效合成。N-新戊酰氧基酰胺和炔烃的[3 + 2]环加成反应可在温和的条件下完成。该反应通过内部氧化途径进行，并且具有非常广泛的底物范围。通过该方案已证明了天然产品（如特克明和巴色辛）的一步合成。