Efficient oxidative cyclization of <i>N</i>-acylhydrazones for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles using <i>t</i>-BuOI under neutral conditions
作者:Peng Gao、Yunyang Wei
DOI:10.1515/hc-2012-0179
日期:2013.4.1
in situ from t-BuOCl and NaI. A variety of 2,5-disubstituted 1,3,4-oxadiazoles were synthesized in high yields within short reaction time. The method is also suitable for cyclization of N-acylhydrazones derived from heterocyclic aldehydes and aliphatic aldehydes. Mild reaction conditions and simple workup operations make the procedure a good alternative for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles
摘要 利用由 t-BuOCl 和 NaI 原位生成的次碘酸叔丁酯 (t-BuOI) 开发了一种有效的 N-酰基腙氧化环化方法。在短时间内以高产率合成了多种 2,5-二取代 1,3,4-恶二唑。该方法也适用于杂环醛和脂肪醛衍生的N-酰基腙的环化。温和的反应条件和简单的后处理操作使该程序成为合成 2,5-二取代 1,3,4-恶二唑的良好替代方法。