Synthesis and characterization of fluorescent 4,6-disubstituted-3-cyano-2-methylpyridines
作者:Masaki Matsui、Akira Oji、Koichi Hiramatsu、Katsuyoshi Shibata、Hiroshige Muramatsu
DOI:10.1039/p29920000201
日期:——
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.