1515876-36-4Relevant academic research and scientific papers
New biscyanine dye based on 1-{2-oxo-2-[4-(2-oxo-2H-chromen-3-yl)phenyl]ethyl}-4-methylpyridinium bromide. Electron transitions and electronic spectra
Yelenich,Skrypska,Lytvyn,Neshchadin,Obushak,Kachkovskii,Yagodinets
, p. 2114 - 2119 (2014)
New biscyanine dye, 4-{2-[4-(dimethylamino)phenyl]ethenyl}-1-{2-[4-(dimethylamino)phenyl]-1-[4-(2-oxo-2H-chromen-3-yl)benzoyl]ethenyl}pyridinium bromide, has been prepared via condensation of 4-dimethylaminobenzaldehyde with 4-methyl-1-{2-oxo-2-[4-(2-oxo-2H-chromen-3-yl)phenyl]ethyl}pyridinium bromide. The latter has been synthesized via the Meerwein reaction of coumarin with 4-acetylphenyldiazonium chloride with subsequent bromination and quaternization of the formed α-bromoketone under the action of 4-methylpyridine. Electronic spectra are analyzed, and quantum-chemical simulation of possible isomers of the biscyanine dye has been performed.
Synthesis of nitrogen heterocycles underlain by application of 3-(4-acetyl[phenyl)-2h-coumarin
Skripskaya,Feilo,Neshchadin,Elenich,Lytvyn,Obushak,Yagodinets
, p. 1655 - 1660 (2014/02/14)
3-(4-Acetylphenyl)-2H-chromen-2-one was obtained from 4- acetylphenyldiazonium chloride in the conditions of Meerwein reaction. Reactions of 3-[4-(2-bromoacetyl)phenyl]-2H-chromen-2-one with pyridine, 4-methylpyridine, quinoline, benzo[f]quinoline, and triphenylphosphine afforded quaternary salts, and with thioacetamide, thiourea, 2-aminopyridine, 2-aminopyrimidine, and 6-aminopurine provided the corresponding derivatives of thiazole, imidazo[1,2-a]pyridine, imidazo[1,2-a]pyrimidine, imidazo[2,1-i] purine. In the reaction of the same bromo derivative with thiosemicarbazide and aromatic aldehydes a thiazole ring is built and the corresponding hydrazones are formed. Pleiades Publishing, Ltd., 2013.
