Issue 43, 2022

Transition metal(ii) complexes of halogenated derivatives of (E)-4-(2-(pyridin-2-ylmethylene)hydrazinyl)quinazoline: structure, antioxidant activity, DNA-binding DNA photocleavage, interaction with albumin and in silico studies

Abstract

Two novel halogenated (Br- and F-) quinazoline derivatives, namely [(E)-4-(2-((6-bromopyridin-2-yl)methylene)hydrazinyl)quinazoline] (L1) and [(E)-4-(2-((3-fluoropyridin-2-yl)methylene)hydrazinyl) quinazoline] (L2), were synthesized and characterized. Their interaction with a series of metal(II) ions (= Mn(II), Ni(II), Cu(II), Zn(II) and Cd(II)) resulted in the formation of six mononuclear complexes characterized by spectroscopic techniques and single-crystal X-ray crystallography. The complexes bear the formulae [Ni(L1)2](NO3)2 (1), [Zn(L2)2](NO3)(PF6) (2), [Cd(L2)(H2O)(CH3OH)(NO3)](NO3) (3), [Cu(L2)Cl2] (4), [Ni(L2)2](NO3)2 (5) and [Mn(L2)(CH3OH)(Cl)2] (6). The biological activity of the compounds was further evaluated in vitro regarding their interaction with calf-thymus DNA, their cleavage ability towards supercoiled circular pBR322 plasmid DNA in the absence or presence of irradiation at various wavelengths (UVA, UVB and visible light), their affinity to bovine serum albumin and their ability to scavenge 1,1-diphenyl-picrylhydrazyl and 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) radicals and to reduce H2O2. In silico molecular docking calculations were employed to study the behavior of the complexes towards calf-thymus DNA and bovine serum albumin.

Graphical abstract: Transition metal(ii) complexes of halogenated derivatives of (E)-4-(2-(pyridin-2-ylmethylene)hydrazinyl)quinazoline: structure, antioxidant activity, DNA-binding DNA photocleavage, interaction with albumin and in silico studies

Supplementary files

Article information

Article type
Paper
Submitted
10 Aug. 2022
Accepted
18 Okt. 2022
First published
18 Okt. 2022
This article is Open Access
Creative Commons BY license

Dalton Trans., 2022,51, 16688-16705

Transition metal(II) complexes of halogenated derivatives of (E)-4-(2-(pyridin-2-ylmethylene)hydrazinyl)quinazoline: structure, antioxidant activity, DNA-binding DNA photocleavage, interaction with albumin and in silico studies

C. Kakoulidou, C. T. Chasapis, A. G. Hatzidimitriou, K. C. Fylaktakidou and G. Psomas, Dalton Trans., 2022, 51, 16688 DOI: 10.1039/D2DT02622H

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