4,5‐Dihydro‐1,2,3‐oxadiazole: A Very Elusive Key Intermediate in Various Important Chemical Transformations
作者:Klaus Banert、Neeraj Singh、Benjamin Fiedler、Joachim Friedrich、Marcus Korb、Heinrich Lang
DOI:10.1002/chem.201502326
日期:2015.10.19
4,5‐Dihydro‐1,2,3‐oxadiazoles are postulated to be key intermediates in the industrial synthesis of ketones from alkenes, in the alkylation of DNA in vivo, and in the decomposition of N‐nitrosoureas; they are also a subject of great interest for theoretical chemists. In the presented report, the formation of 4,5‐dihydro‐1,2,3‐oxadiazole and the subsequent decay into secondary products have been studied
推测4,5-二氢-1,2,3-恶二唑是从烯烃工业合成酮,体内DNA烷基化以及N-亚硝基脲分解的关键中间体。它们也是理论化学家非常感兴趣的主题。在本报告中,已通过NMR监测分析研究了4,5-二氢-1,2,3-恶二唑的形成及其随后降解为副产物的过程。现在,通过1 H,13 C和15 N NMR光谱以及在非常低的温度下进行的相关2D实验,已经证实了逃避特性难以捉摸的特性。我们用适当取代的N进行的实验在非极性条件下使用th(I)醇盐作为碱的亚硝基脲回答了有关4,5-二氢-1,2,3-恶二唑的存在及其副产物的重要问题。