Novel Mannich bases bearing pyrazolone moiety. Synthesis, characterization and electrochemical studies

Autor: KRISHNA NAIK, ALURU RAGHAVENDRA GURU PRASAD, YADATI NARASIMHA SPOORTHY, LAKSHMANA RAO KRISHNA RAO RAVINDRANATH
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Journal of Electrochemical Science and Engineering, Vol 3, Iss 2, Pp 57-79 (2013)
Druh dokumentu: article
ISSN: 1847-9286
DOI: 10.5599/jese.2013.0030
Popis: The present investigation describes a series of new {4-[3-Methyl-5-oxo-4-(4|-substituted phenyl hydrazono)-4,5-dihydro-pyrazol-1-yl]-phenoxy}-acetic acid (2-oxo-1-piperidine-1-ylmethyl-1,2-dihydro–indol-3-ylidene)-hydrazides synthesized by the Mannich reaction of {4-[3-Methyl-5-oxo-4-(4|-substituted phenyl hydrazono)-4,5-dihydro-pyrazol-1-yl]-phenoxy}-acetic acid (2-oxo-1,2-dihydro-indol-3-ylidene)-hydrazide with aqueous formaldehyde and a solution of piperidine in dimethylformamide. These novel Mannich bases were characterized by elemental analysis, IR, 1H NMR and mass spectral data. Electrochemical behavior of these compounds were studied by two techniques namely polarography and cyclic voltammetry. The results from both the techniques were compared and the reduction mechanism in acidic as well as basic medium was proposed.
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