Nanoparticles of organosilane-based nitrite ionic liquid immobilized on silica for the diazotization of aniline derivatives and subsequent synthesis of azo dyes
作者:Hassan Valizadeh、Mohammad Amiri、Fatemeh Hosseinzadeh
DOI:10.1016/j.dyepig.2011.09.013
日期:2012.3
nanoparticles as a nitrosonium source. Excellent performance was exhibited in the diazotization reaction of various aniline derivatives in the presence of HCl under mild heterogeneous conditions (room temperature and short reaction time). In-situ coupling of diazonium salts to a range of tertiary anilines, phenols and naphthols afforded the requisite azo dyes in good yield, using standard experimental procedures
由N-甲基咪唑与(3-氯丙基)三甲氧基硅烷的反应制备含三甲氧基甲硅烷基的咪唑基亚硝酸盐离子液体。将该离子液体共价固定在二氧化硅上,得到亚硝酸咪唑鎓部分保持完整的纳米颗粒。进行重氮化反应作为模型反应,以检查这些纳米粒子作为硝鎓源的活性。在温和的非均相条件下(室温和较短的反应时间),在HCl存在下,各种苯胺衍生物的重氮化反应均表现出优异的性能。使用标准实验程序,将重氮盐与一系列叔苯胺,苯酚和萘酚进行原位偶联,以高收率提供了必要的偶氮染料。