作者:Winton D. Jones、Richard A. Schnettler、Edward W. Huber
DOI:10.1002/jhet.5570270307
日期:1990.3
2-Dimethylaminomethylidene-1,3-diketones are useful synthons for the construction of 5-acyl-6-substituted-3-cyano-2(1H)-pyridinones. The reaction of these 1,3-diketones and the anion of cyanoacetamide gave the title compounds. When the 1,3 diketone contained different alkyl or aryl groups, mixtures of regioisomers were formed. To circumvent this problem, dimethylaminomethylidene hydrazones, regioselectively
2-二甲基氨基亚甲基-1,3-二酮是用于构建5-酰基-6-取代的-3-氰基-2(1 H)-吡啶酮的有用的合成子。这些1,3-二酮与氰基乙酰胺的阴离子反应,得到标题化合物。当1,3-二酮包含不同的烷基或芳基时,形成区域异构体的混合物。为了解决这个问题,使由二甲基肼基烯酮和二甲基甲酰胺二甲基乙缩醛区域选择性制备的二甲基氨基亚甲基与氰基乙酰胺阴离子反应,然后酸水解,得到标题化合物。