European Journal of Chemistry

Pharmacological evaluation of ONNO donor quadridentate Schiff bases



Main Article Content

Muhammad Shabbir
Zareen Akhter
Ahmad Raza Ashraf
Michael Bolte
Sumbal Wahid
Bushra Mirza

Abstract

Four ONNO donor Schiff bases 2-((E)-(2-((E)-2-hydroxybenzylideneamino)ethylimino) methyl)phenol (H2L1), 2-((E)-(2-((E)-2-hydroxybenzylideneamino)propylimino)methyl) phenol (H2L2), 2-((E)-1-(2-((E)-1-(2-hydroxyphenyl) ethylideneamino)ethylimino)ethyl) phenol (H2L3) and 2-((E)-1-(2-((E)-1-(2-hydroxyphenyl)ethylideneamino)propylimino) ethyl)phenol (H2L4) were synthesized by the reactions of ethylene/propylene diamines with 2-hydroxy benzaldehyde/2-hydroxy acetophenone. The new compounds were characterized by FT-IR and NMR (1H and 13C) spectroscopic techniques accompanied by elemental, GC/MS and single crystal X-ray diffraction analyses. These compounds were screened for various biological studies i.e. brine shrimp cytotoxic, antitumor and antibacterial activities The compound H2L3 showed highest cytotoxic and antitumor activities with lowest LD50 (14.27) and IC50 values (18.90). All the compounds were highly active in protecting DNA against hydroxyl free radicals. Antibacterial studies had shown that these were inactive against Gram positive bacteria (Staphylococcus aureus and Micrococcus luteus) while active against Gram negative bacteria (Enterobacter aerogenes, Bordetella bronchiseptica and Salmonella typhi) showing variable antibacterial activity.


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Shabbir, M.; Akhter, Z.; Ashraf, A. R.; Bolte, M.; Wahid, S.; Mirza, B. Pharmacological Evaluation of ONNO Donor Quadridentate Schiff Bases. Eur. J. Chem. 2017, 8, 46-51.

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