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The biaryl and its derivatives are important organic compounds that possess various interesting applications, such as in the field of medicine, organic-light emitting materials, agrochemicals and other functional properties. Traditionally, radical arylation of arylhydrazines and anilines requires the use of metals, excess of base, flammable solvent and so on. Thus, a greener catalytic system for the synthesis of 2-aminobiaryls is highly sought after. In this work, a recyclable catalytic media has been developed for the synthesis of 2-aminobiaryl derivatives via a direct arylation of anilines with arylhydrazines in the presence of water extract of the burned-ash of onion peel waste (ash-water extract). This method provides numerous advantages, such as external baseand metal-free, recyclable catalytic system, inexpensive and the products were achieved in moderate to good yield. This sustainable synthesis is scientifically important, as it is capable of minimizing the use of toxic reagents and at the same time offers an alternative method to manage the abundant bio-waste.

SYNTHESIS OF 2-AMINOBIARYL DERIVATIVES PROMOTED BY WATER EXTRACT OF ONION PEEL ASH