Biological and Pharmaceutical Bulletin
Online ISSN : 1347-5215
Print ISSN : 0918-6158
ISSN-L : 0918-6158
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Synthesis and Pharmacological Activities of Hydrazones, Schiff and Mannich Bases of Isatin Derivatives
Seshaiah Krishnan SRIDHARAtmakuru RAMESH
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2001 Volume 24 Issue 10 Pages 1149-1152


Schiff bases and phenyl hydrazone of isatins were prepared by reacting isatin and the appropriate aromatic primary amine/hydrazines. A new series of the corresponding N-mannich bases were synthesized by reacting them with formaldehyde and diphenylamine. The chemical structures were confirmed by means of their 1H-NMR, IR spectral data and elemental analysis. The compounds were screened for analgesic, antiinflammatory and antipyretic activity. 1-Diphenylaminomethyl-3-(1-naphthylimino)-1,3-dihydroindol-3-one (4), 3-(1-naphthylimino)-5-bromo-1,3-dihydroindol-2-one (2) and 1-diphenylaminomethyl-3-(4-methylphenylimino)-1,3-dihydroindol-3-one (7) were found to exhibit the highest analgesic, anti-inflammatory and antipyretic activity respectively. 1-Diphenylaminomethyl-3-(4-methylphenylimino)-1,3-dihydroindol-3-one (7) was found to be the most active compound of the series.

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© 2001 The Pharmaceutical Society of Japan
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