Room-temperature synthesis of pharmaceutically important carboxylic acids bearing the 1,2,4-oxadiazole moiety
作者:Marina Tarasenko、Nikolay Duderin、Tatyana Sharonova、Sergey Baykov、Anton Shetnev、Alexey V. Smirnov
DOI:10.1016/j.tetlet.2017.08.020
日期:2017.9
An efficient and mild one-pot protocol has been developed for the synthesis of 1,2,4-oxadiazoles via the reaction of amidoximes with dicarboxylic acid anhydrides in a NaOH/DMSO medium. The method allows the synthesis of diversely substituted carboxylic acids bearing the 1,2,4-oxadiazole motif, – a popular building block for pharmaceutical research, in moderate to excellent yields. The reaction scope
已经开发了一种有效且温和的一锅操作规程,用于通过a胺肟与二羧酸酐在NaOH / DMSO介质中的反应来合成1,2,4-恶二唑。该方法可以合成具有1,2,4-恶二唑基序的不同取代的羧酸,该基团是药物研究的常用组成部分,产率中等至优异。反应范围包括芳族和杂芳族酰胺肟以及五元,六元和七元酸酐。该方法的优点是证明了克级可缩放性和使用廉价的起始原料,从工艺化学的角度来看,这对于将来的工业应用至关重要。