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Cyanation and bromination of electron-rich aromatics by BrCN under solvent-free conditions catalyzed by AlCl3: A new examples of Beckmann-type rearrangement

عنوان مقاله: Cyanation and bromination of electron-rich aromatics by BrCN under solvent-free conditions catalyzed by AlCl3: A new examples of Beckmann-type rearrangement
شناسه ملی مقاله: JR_ICC-6-4_003
منتشر شده در شماره 4 دوره 6 فصل در سال 1397
مشخصات نویسندگان مقاله:

Nader Noroozi Pesyan - Faculty of Chemistry, Urmia University, ۵۷۱۵۹, Urmia, Iran
Ali Gharib - Department of Chemistry, Islamic Azad University, Mashhad, Iran
Azam Monfared - Department of Chemistry, Tehran Centre branch, Payam-e-Noor University, Tehran, Iran

خلاصه مقاله:
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.

کلمات کلیدی:
BrCN, Electron-rich aromatic compounds, Aluminum trichloride, solvent-free, Intramolecular hydrogen bond, Beckmann-type rearrangement

صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/931353/