4,6-Disubstituted-3-cyano-2-methylpyridines, easily prepared by treating alpha,beta-unsaturated carbonyl compounds with beta-aminocrotononitrile in the presence of potassium tert-butoxide, have been found to show intense fluorescence in the region of 400-552 nm. 3-Cyano-4,6-bis(4-methoxyphenyl)-and 3-cyano-4,6-di(2-furyl)-2-methylpyridines show more intense fluorescence than 7-diethylamino-4-methylcoumarin. The 3-cyano group of pyridines increases the fluorescence intensities and improves photostabilities.
Shibata, Katsuyoshi; Katsuyama, Isamu; Izoe, Hideaki, Journal of Heterocyclic Chemistry, 1993, vol. 30, # 1, p. 277 - 281
Rapid synthesis of 3-cyanopyridine-derived chromophores with two-dimensional tunability and solvatochromic photophysical properties
作者:Mark C. Bagley、Zhifan Lin、Simon J. A. Pope
DOI:10.1039/b910664b
日期:——
Nicotinonitrile
chromophores with two tunable functions, excellent photophysical properties and solvatochromic behaviour can be prepared quickly and efficiently by microwave-assisted tandem oxidation/Bohlmann–Rahtz heteroannulation followed by copper(I)-mediated N-arylation.