Synthesis of 4-amino-1H-benzo[4,5]imidazo[1,2-a]pyrimidin-2-one and its disperse azo dyes. Part 1: Phenylazo derivatives
DYES AND PIGMENTS, cilt.71, sa.2, ss.90-96, 2006 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 71 Sayı: 2
- Basım Tarihi: 2006
- Doi Numarası: 10.1016/j.dyepig.2005.06.006
- Dergi Adı: DYES AND PIGMENTS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.90-96
- Süleyman Demirel Üniversitesi Adresli: Hayır
Özet
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 (1) 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 (1). The prepared compounds were characterized by UV-vis, FT-IR and H-1 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. (c) 2005 Elsevier Ltd. All rights reserved.