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Title: | Synthesis of 4-amino-1H-benzo[4,5]imidazo[1,2-a]pyrimidin-2-one and its disperse azo dyes. Part 1: Phenylazo derivatives | Authors: | Karci, F. Demirçali, A. Şener, I. Tilki, T. |
Keywords: | Absorption properties Azopyrimidone dyes Diazo-coupling reaction Disperse dyes Solvent effect Substituent effect Absorption Derivatives Dispersions Fourier transform infrared spectroscopy Nuclear magnetic resonance spectroscopy pH effects Solvents Synthesis (chemical) Ultraviolet spectroscopy Elemental analysis Ethyl cyanoacetate Phenylazopyrimidone dyes Azo dyes azo dye |
Abstract: | The reaction of 2-aminobenzimidazole with ethyl cyanoacetate gave access to an efficient synthesis of 4-amino-1H-benzo[4,5]imidazo[1,2-a]pyrimidin-2-one (I) in excellent yield. A series of novel phenylazopyrimidone dyes were prepared by linking o-, m-, p-nitroaniline, o-, m-, p-chloroaniline, o-, m-, p-anisidine, o-, m-, p-toluidine and aniline to 4-amino-1H-benzo[4,5]imidazo-[1,2-a]pyrimidin-2-one (I). The prepared compounds were characterized by UV-vis, FT-IR and 1H NMR spectroscopic techniques and elemental analysis. The effect of varying pH and solvent upon the absorption ability of phenylazopyrimidones substituted with electron-withdrawing and electron-donating groups at their o-, m-, p-position was examined. © 2005 Elsevier Ltd. All rights reserved. | URI: | https://hdl.handle.net/11499/4674 https://doi.org/10.1016/j.dyepig.2005.06.006 |
ISSN: | 0143-7208 |
Appears in Collections: | Fen-Edebiyat Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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