Synthesis and conformations of cross-conjugated polyenes containing heterocyclic moieties with diverse structures
作者:Zhanna A. Krasnaya、Vadim V. Kachala、Sergei G. Zlotin
DOI:10.1016/j.mencom.2014.11.024
日期:2014.11
New non-linear cross-conjugatedpolyenes containing a central 4-ylidene-substituted pyran or N-methyldihydropyridine ring have been synthesized. Interaction of chromophores in these compounds occurs through the ylidene group linked to the heterocycles.
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