α-(1-PHENYLHYDRAZINO)-ALKANONE PHENYLHYDRAZONES: THE REACTION WITH CARBONYL COMPOUNDS

Article abstract of DOI:10.1016/S0040-4020(01)87787-5

The unsymmetrically disubstituted hydrazines 1 were condensed with carbonyl compounds.Some of the expected condensation products were isolated, but some were formed as unstable intermediates which underwent 1,4-elimination: The phenylhydrazone of the carbonyl compound used was obtained, together with the corresponding phenylazo-alkene 11 or alternatively, the 1,4-addition product of a different protic nucleophile to 11.