Azines, alkylation reduction

Azoalkanes have been prepared by oxidation of N,N -dialkylhydrazines with copper(II) chloride9 or with yellow mdialkyl hydrazines are obtained by alkylation of N,N -diformylhydrazine and subsequent hydrolysis,9 by reduction of the corresponding azine with lithium aluminum hydride,11 or by catalytic hydrogenation of the azine over a platinum catalyst.10... 

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