Synthesis of a new 1,4-dihydropyridine containing the imidazo[1,5-α]pyridine nucleus
作者:Empar Fos、Francisco Boscá、David Mauleón、Germane Carganico
DOI:10.1002/jhet.5570300232
日期:1993.3
The synthesis of the new dihydropyridine diethyl 1,4-dihydro-4-(imidazo[1,5-α]pyridin-8-yl)-2,6-dimethyl-pyridine-3,5-dicarboxylate (1) is described. After many attempts to prepare the key intermediate aldehyde 2a by different approaches, this compound has been obtained in good yields from methyl 2-cyano-3-pyridinecar-boxylate (10). A three-step procedure involving reduction to the amine, formylation
描述了新的二氢吡啶二乙基1,4-二氢-4-(咪唑并[1,5-α]吡啶基-8-基)-2,6-二甲基吡啶-3,5-二羧酸酯(1)的合成。在通过不同方法多次制备关键中间体醛2a的尝试后,该化合物已从2-氰基-3-吡啶-羧甲基丙烯酸酯(10)中以高收率获得。使用了三步程序,包括还原成胺,甲酰化以及伴随的环化和酯基的还原。