Cross-conjugated ω,ω′-bis(dimethylamino) ketones and dinitriles containing a cycloalkane or piperidine fragment: Synthesis and study of spectroscopic properties

Article abstract of DOI:10.1007/s11172-010-0009-3

N-Substituted 4-piperidones react with 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-conju