An environmentally benign, one-pot diazotization and coupling reaction using ChCl:tartaric acid DES at room temperature is described. The bulky tartrate ion renders stability to the diazoniumsalt at room temperature, also evidenced by 1H NMR. The isolated diazoniumsalt is stable and active even after 192 h at room temperature.
描述了在室温下使用ChCl:酒石酸DES进行的环境友好的一锅重氮化和偶联反应。庞大的酒石酸根离子在室温下对重氮盐也具有稳定性,这也由1 H NMR证实。分离出的重氮盐即使在室温下192小时后仍是稳定且有活性的。
A new nitrite ionic liquid (IL-ONO) as a nitrosonium source for the efficient diazotization of aniline derivatives and in-situ synthesis of azo dyes
作者:Hassan Valizadeh、Ashkan Shomali
DOI:10.1016/j.dyepig.2010.11.010
日期:2012.3
affect the efficient diazotization of arylamines. The diazoniumsalts thus obtained were coupled, using standard experimental procedures, to a range of tertiary anilines, phenols and naphthols to afford the requisite azo dyes in good yield. The diazotization and subsequent azo-coupling generated the related azo dyes at 0–5 °C in short reaction times with a simple experimental procedure.