Hydrazones of 5-nitro-2-furaldehyde, 3,5-dibromosalicylaldehyde, and o-hydroxyacetophenone condense with the carbonyl group of NN-disubstituted aliphatic amides in the presence of sulphonyl chlorides to yield amide hydrazones.
W. Hoyle, J. Chem. Soc. C, 1967, 690 DOI: 10.1039/J39670000690
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