74676-90-7Relevant academic research and scientific papers
Chemistry of Heterocyclic Amidines: Part IX - Structure of 3-Amino-4-arylazo-2-pyrazolin-5-one
Fahmy, H. M.,Elnagdi, M. H.,Ibrahim, L. I.
, p. 644 - 647 (2007/10/02)
The structures of 3-amino-4-arylazo-2-pyrazolin-5-ones (Ia-g) have been assigned on the basis of UV, IR and polarographic analyse.Apparent dissociation constants (pKa) together with half-wave potentials (E1/2) are correlated with Hammet's different ? sets.The obtained data indicate that these compounds exist in solid state in the hydrazone form while in aqueous buffered media in the azo form.
Reactions with the Arylhydrazones of some α-Cyanoketones
Kandeel, Ezzat Mohemed,Sadek, Kamal Usef,Elnagdi, Mohamed Hilmy
, p. 91 - 94 (2007/10/02)
The N-methylarylhydrazones of mesoxalodinitrile (3) and of ethyl cyanoglyoxalate (7) could be prepared via methylation of the corresponding phenylhydrazones 4 and 6, respectively.The hydrazones 3 and 8 reacted with hydrazine hydrate to yield the amidrazone 1 and the hydrazide 2b.The behaviour of compounds 1 and 2a, b towards a variety of reagents is reported.A variety of new α-arylhydrazononitriles were synthesised. - Keywords: Arylhydrazones, α-Cyanoketones
