Cross-conjugated ω,ω′-bis(dimethylamino) ketones and dinitriles containing a cycloalkane or piperidine fragment: synthesis and study of spectroscopic properties
作者:Zh. A. Krasnaya、L. A. Shvedova、A. S. Tatikolov、E. O. Tret’yakova、V. V. Kachala、S. G. Zlotin
DOI:10.1007/s11172-010-0009-3
日期:2009.2
β-dimethylaminoacrolein aminals to give keto-cyanines containing a piperidine ring. A reaction of 3-dimethylamino-1, 1,3-trimethoxypropane with 1-ethoxycarbonylpiperidin-4-ylidenemalononitrile produces a cross-conjugated ω,ω′-bis-(dimethylamino) dinitrile. Its yield is doubled when ionic liquids are used. The spectroscopic properties of the compounds obtained are highly sensitive to the structure: replacement of the
N-取代的 4-哌啶酮与 β-二甲氨基丙烯醛缩醛胺反应生成含有哌啶环的酮花青。3-二甲氨基-1, 1,3-三甲氧基丙烷与 1-乙氧基羰基哌啶-4-亚基丙二腈反应生成交叉共轭的 ω,ω'-双-(二甲氨基)二腈。当使用离子液体时,其产率加倍。所得化合物的光谱性质对结构高度敏感:酮花青中的 C=O 基团被 C=C(CN)2 基团取代导致吸收光谱发生相当大的红移,同时取代了中心桥(CH2)3 片段由 (CH2)4 导致低色移。所有获得的化合物都表现出正溶剂化显色。