Ultrasound-Assisted Cleavage of N-N Bonds in Hydrazines by Raney Nickel

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Abstract
The reductive N-N cleavage of N-substituted N′,N′-dimethylhydrazines to give primary amines by Raney nickel/hydrogen is conveniently performed under atmospheric pressure of hydrogen by sonication of the reaction vessel in a simple ultrasound cleaner. Sterically hindered hydrazines are also cleaved and no racemization or debenzylation is observed.

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