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：Valizadeh Hassan^*; Shomali Ashkan

来源：Dyes and Pigments, 2012, 92(3): 1138-1143.

DOI：10.1016/j.dyepig.2010.11.010

• Azo-coupling
• Azo dyes
• Diazotization
• Nitrite ionic liquid
• Task-specific ionic liquid
• Nitrosonium ion

A new task-specific nitrite containing ionic liquid derived from the O-nitrosation of N-methyl-N-hydroxybutylimidazolinium chloride was synthesized and used as a source of nitrosonium ion to affect the efficient diazotization of arylamines. The diazonium salts 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 degrees C in short reaction times with a simple experimental procedure.

• 出版日期2012-3