Synthesis of 3,5,5-Trisubstituted 4-Hydroxy-4<i>H</i>,5<i>H</i>-1,2,4-oxadiazoles through the Condensation of<i>N</i>-Hydroxyamidoximes and Ketones or Aldehydes
作者:Ning Liu、Lian-Jie Zhai、Peng Lian、Hui Li、Bo-Zhou Wang
DOI:10.1002/ejoc.201500083
日期:2015.5
the development of new pharmaceuticals and functional materials. Herein, a catalyst-free reaction of N-hydroxyamidoxime with various ketones or aldehydes has been investigated. The reaction was carried out in methanol under mild conditions and gave 3,5,5-trisubstituted 4-hydroxy-4H,5H-1,2,4-oxadiazole derivatives in excellent yields. The structure of product 3f was confirmed by single-crystal X-ray
一类有趣的杂环化合物,1,2,4-恶二唑及其衍生物因其在新药物和功能材料的开发中的用途而引起了化学家的关注。在此,研究了 N-羟基脒肟与各种酮或醛的无催化剂反应。该反应在温和条件下在甲醇中进行,并以极好的收率得到 3,5,5-三取代的 4-羟基-4H,5H-1,2,4-恶二唑衍生物。通过单晶 X 射线衍射研究证实了产物 3f 的结构。