A Route to Dicyanomethylene Pyridines and Substituted Benzonitriles Utilizing Malononitrile Dimer as a Precursor
作者:Noha M. Helmy、Fatma E. M. El-Baih、Monirah A. Al-Alshaikh、Moustafa S. Moustafa
DOI:10.3390/molecules16010298
日期:——
The conditions of the reaction of malononitrile dimer with enaminones and arylidenemalononitrile could be adapted to yield either pyridines or benzene derivatives. A new synthesis of pyrido[1,2-a]pyrimidines from the reaction of malononitrile dimer 1 and 2-phenyl-3-piperidin-1-yl-acrylonitrile (11) is described. Compound 1 condensed with DMFDMA to yield an enaminonitrile that reacted with hydrazine hydrate to yield N',4,6-triamino-2H-pyrazolo[3,4-b]pyridine-5-carboxamidine (17).
马隆腈二聚体与烯亚胺酮和芳基腈马隆酸酯的反应条件可以调整,以获得吡啶或苯衍生物。本文描述了一种从马隆腈二聚体1与2-苯基-3-哌啶-1-基丙烯腈(11)反应中合成吡啶[1,2-a]嘧啶的新方法。化合物1与DMFDMA缩合,生成烯亚胺腈,再与水合肼反应,得到N',4,6-三氨基-2H-吡唑[3,4-b]吡啶-5-羧酰胺(17)。