Reactions of aminals of conjugated ?-dimethylaminoaldehydes with coumarin derivatives
作者:Zh. A. Krasnaya、Yu. V. Smirnova、A. S. Tatikolov、V. S. Bogdanov、E. V. Nikishova、V. L. Savel'ev
DOI:10.1007/bf00702402
日期:1995.3
ω-dimethylaminoaldehydes with various derivatives of 4-methyl- or 3-acetyl coumarins produce ω-dimethylaminopolyenones containing coumarin fragments. Unlike the starting coumarins, these polyenones practically do not fluoresce. Dialkyl-substituted coumarins with hydroxyl groups in positions 5 or 7 react with β-dimethylaminoacrolein aminal to give salts consisting of 1 mole of doubly charged dimethylaminopropenyl
共轭 ω-二甲氨基醛的缩醛与 4-甲基-或 3-乙酰香豆素的各种衍生物反应生成含有香豆素片段的 ω-二甲氨基多烯酮。与起始香豆素不同,这些多烯酮实际上不发荧光。在 5 位或 7 位带有羟基的二烷基取代香豆素与 β-二甲氨基丙烯醛缩醛胺反应生成由 1 摩尔带双电荷的二甲氨基亚丙烯基二甲基铵阳离子和 2 摩尔酚盐离子(源自起始香豆素)组成的盐。通过吸收光谱和荧光光谱研究了溶液中盐的结构和性质。