A new route to highly substituted thieno[2,3-b]pyridines via cascade heterocyclization of 2-acyl-1,1,3,3-tetracyanopropenide salts
作者:Arthur A. Grigor’ev、Sergey V. Karpov、Yakov S. Kayukov、Oleg E. Nasakin、Iuliia A. Gracheva、Victor A. Tafeenko
DOI:10.1007/s10593-017-2044-6
日期:2017.2
2-Acyl-1,1,3,3-tetracyanopropenides undergo cascade heterocyclization under the action of mercaptoacetic esters, leading to the formation of new 3,6-diamino-4-aroyl-5-cyanothieno[2,3-b]pyridine-2-carboxylates. The fast and convenient synthetic way to highly substituted thieno[2,3-b]pyridine scaffold is described.
2-Acyl-1,1,3,3-tetracyanopropenides在巯基乙酸酯的作用下进行级联杂环化反应,导致形成新的3,6-二氨基-4-aroyl-5-cyanothieno [2,3- b ]吡啶-2-羧酸盐。描述了快速和方便的合成方法,以高度取代的噻吩并[2,3- b ]吡啶骨架。