[4 + 2] Annulation Reaction of <i>In Situ</i> Generated Azoalkenes with Azlactones: Access to 4,5-Dihydropyridazin-3(2<i>H</i>)-Ones
作者:Wei-Cheng Yuan、Bao-Xue Quan、Jian-Qiang Zhao、Yong You、Zhen-Hua Wang、Ming-Qiang Zhou
DOI:10.1021/acs.joc.0c01592
日期:2020.9.18
unprecedented [4 + 2] annulation reaction between in situ formed azoalkenes and azlactones has been developed. This reaction provides a facile access to an array of 4,5-dihydropyridazin-3(2H)-one derivatives, which are very promising in medicinal applications as potential biologically active candidates. Notably, these dihydropyridazinones could also be synthesized via a one-pot reaction protocol by using the
在原位形成的偶氮烯烃与z内酯之间,出现了前所未有的[4 + 2]环化反应。该反应提供了容易获得的4,5-二氢哒嗪-3(2 H)-one衍生物的阵列,这些衍生物在医学应用中作为潜在的生物活性候选物非常有前途。值得注意的是,这些二氢吡啶并酮也可以通过一锅反应方案通过使用由N-酰基氨基酸原位形成的氮杂内酯并原位合成。由α-卤代hydr生成偶氮烯烃。克级实验以及产物向其他含氮化合物的多用途转化也证明了该方法的潜在应用。