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。