| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 177093 | Dyes and Pigments | 2011 | 6 Pages |
Different nitrates were used as sources of nitrosonium ion to obtain diazonium salts. Diverse azo compounds were synthetized in acetonitrile giving very good yields and free of by-products in comparison with traditional synthesis. Among the tested species, the best combination for para red synthesis was nitric acid and gaseous hydrogen chloride.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Azo dyes derived of β-naphthol can be synthesized in organic media with good yields. ► The use of organic solvent broad the scope of the technique to highly insoluble amines. ► In this procedure no by-products are formed. ► Compared to traditional synthesis, this methodology has better Green metrics.
