作者:D. B. Rubinov、T. A. Zheldakova、I. L. Rubinova、A. V. Baranovskii
DOI:10.1134/s1070428008030196
日期:2008.3
N-Substituted 6-methyl-1,2,3,4-tetrahydropyridine-2,4-diones reacted with aliphatic carboxylic acid chlorides in the presence of pyridine or triethylamine to give the corresponding 4-O-acyl derivatives which underwent O,C-migration of the acyl group by the action of 2 equiv of triethylamine and a catalytic amount of 2-hydroxy-2-methylpropanenitrile. Reactions of 3-acyl-6-methyl-1,2,3,4-tetrahydropyridine-2,4-diones thus formed with aliphatic and aromatic amines gave the corresponding enamino derivatives at the side acyl group. Enamino derivatives at the C4 =O group were obtained by transformation of 3-acyl-1,2,3,4-tetrahydropyridine-2,4-diones into 3-acyl-4-methoxy-6-methyl-1,2-dihydropyridin-2-ones via alkylation with dimethyl sulfate and subsequent treatment with amines.
在吡啶或三乙胺存在下,N-取代的 6-甲基-1,2,3,4-四氢吡啶-2,4-二酮与脂肪族羧酸氯化物反应,生成相应的 4-O-酰基衍生物,在 2 等量三乙胺和 2-羟基-2-甲基丙腈催化下,酰基发生 O,C-迁移。由此形成的 3-酰基-6-甲基-1,2,3,4-四氢吡啶-2,4-二酮与脂肪族和芳香族胺反应,在侧酰基上得到相应的烯酰胺衍生物。将 3-酰基-1,2,3,4-四氢吡啶-2,4-二酮与硫酸二甲酯进行烷基化,然后用胺处理,可得到 C4 =O 基团的烯酰胺衍生物。