Novel process for the preparation of N,N'-bisacyl hydrazides

In a process for the preparation of acyl hydrazides of the formula ##STR10## wherein A and B individually are a group of the formula ##STR11## wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms, x is 0 or 1 and R.sub.2 and R.sub.3 are individually selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms and n and m are individually 0, 1, 2 or 3 by reacting a compound of the formula ##STR12## with a hydrazide of the formula ##STR13## the improvement comprising effecting the reaction in the presence of at least one catalyst selected from the group consisting of primary, secondary or tertiary aliphatic, alicyclic and heterocyclic amines having 1 to 3 amino groups and amine alkoxides and quaternary ammonium hydroxides derived from said amines.