The Structure of the Product Formed by Condensation of Malononitrile with Dialkyl Acetone-1,3-dicarboxylates
作者:Petr Šimunek、Jernej Baškovč、Uroš Grošelj、Anton Meden、Jurij Svete、Branko Stanovnik
DOI:10.1515/znb-2010-0706
日期:2010.7.1
By the condensation of malononitrile (1) with dialkyl acetone-1,3-dicarboxylates 2a, b alkyl (3- cyano-6-alkoxy-2-oxo-1,2-dihydropyridin-4-yl)acetates 6a, b are formed in contrast to an earlier report according to which diethyl 3-(dicyanomethylene)glutarate 3b was obtained in the reaction of 1 and 2a. Compounds 6a, b were transformed with DMFDMA into the corresponding (E)-alkyl 2-(3- cyano-6-alkoxy-2-oxo-1
通过丙二腈 (1) 与二烷基丙酮-1,3-二羧酸酯 2a、b 缩合,形成烷基(3-氰基-6-烷氧基-2-氧代-1,2-二氢吡啶-4-基)乙酸酯 6a、b与之前的报道相反,根据该报道,在 1 和 2a 的反应中获得了 3-(二氰基亚甲基)戊二酸二乙酯 3b。将化合物 6a、b 用 DMFDMA 转化为相应的 (E)-烷基 2-(3-氰基-6-烷氧基-2-氧代-1,2-二氢吡啶-4-基)-3-(二甲氨基)丙烯酸酯 7a,湾 X射线结构分析证实了6a和7a的结构。图形摘要丙二腈与二烷基丙酮-1,3-二羧酸缩合产物的结构