Document Type : Original Research Article
Authors
1 Faculty of Chemistry, Urmia University, 57159, Urmia, Iran
2 Department of Chemistry, Islamic Azad University, Mashhad, Iran
3 Department of Chemistry, Tehran Centre branch, Payam-e-Noor University, Tehran, Iran
Abstract
A convenient route for cyanation and bromination of some electron-rich aromatics (anisole, 1,3-dimethoxybenzene, 1,4-dimethoxybenzene, 1,3,5-trimethoxybenzene and β-naphthol) by BrCN in the presence of aluminum trichloride (AlCl3), as catalyst, by grinding method under solvent-free conditions at room temperature to 60 °C was described in good yield. The structures of all obtained products were characterized by FT-IR, 1H NMR, 13C NMR, and Mass spectrometry techniques. Anisole and 4-cyanobenzonitrile afforded both cyanated and brominated products. 1,3-Dimethoxybenzene yielded to two types of the cyanated products. 1,4-Dimethoxybenzene has done some unusual coupling reactions via new Beckmann-type rearrangement. No bromination of 1,4-dimethoxybenzene was observed under the same conditions. 1,3,5-Trimethoxybenzene and β-naphthol obtained both cyanated and brominated products which were analyzed by HPLC technique.
Graphical Abstract
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Keywords
- BrCN
- Electron-rich aromatic compounds
- Aluminum trichloride
- solvent-free
- Intramolecular hydrogen bond
- Beckmann-type rearrangement
Main Subjects
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