Direct Synthesis of <i>N</i>-(1,2,5-Oxadiazolyl)hydrazones through a Diazotization/Reduction/Condensation Cascade
作者:Dmitry M. Bystrov、Ivan V. Ananyev、Leonid L. Fershtat、Nina N. Makhova
DOI:10.1021/acs.joc.0c02243
日期:2020.12.4
A straightforward synthesis of a series of previously unknown N-(1,2,5-oxadiazolyl)hydrazones through the diazotization/reduction/condensation cascade of amino-1,2,5-oxadiazoles was accomplished. The described protocol was suitable for a wide array of target hydrazones, which were prepared in good to high yields under smooth reaction conditions with very good functional group tolerance. Importantly
通过氨基1,2,5-恶二唑的重氮化/还原/缩合级联反应,可以直接合成一系列先前未知的N-(1,2,5-恶二唑基)hydr。所描述的方案适用于各种各样的目标,它们在平滑的反应条件下以良好的官能团耐受性以高至高收率制备。重要的是,本文提出的方法揭示了直接进行原位勘测的途径(1,2,5-oxadiazolyl)肼的生成。另外,合成了结合有与1,2,5-恶二唑2-氧化物亚基连接的质子化motif基序的离子结构的第一个实例,表明所制备的化合物对酸促进的水解的稳定性。总体而言,该方法可直接获得候选候选药物的等位基因类似物,以治疗各种被忽视的疾病,从而使其在药物化学和药物设计中的潜在应用成为可能。