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A comparative study and development of an improved method for the reduction of nitroarenes into arylamines by Al/NH4X (X=Cl, Br, I) in methanol under ultrasonic conditions.

Pasha MA, Jayashankara VP

Department of Studies in Chemistry, Central College Campus, Bangalore University, Bangalore 560 001, India. m_af_pasha@yahoo.co.in

Nitroarenes were shown by us earlier to undergo reduction when treated with Al/NH4Cl in methanol under sonic conditions to give anilines in high yields [D. Nagaraja, M.A. Pasha, Tetrahedron Lett. 40 (1999) 7855]. Now, a comparative study has been carried out and an efficient and improved procedure for this reduction by using Al/NH4X (X=Cl, Br, I) is reported. A plausible mechanism of the reaction is envisaged.

Published 14 October 2005 in Ultrason Sonochem, 13(1): 42-6.
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