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Issue 27, 2019, Issue in Progress
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Silver derivatives of multi-donor heterocyclic thioamides as antimicrobial/anticancer agents: unusual bio-activity against methicillin resistant S. aureus, S. epidermidis, and E. faecalis and human bone cancer MG63 cell line

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Abstract

The basic aim of this study pertains to the synthesis of silver nitrate complexes and the study of their antimicrobial and anticancer bio-activity. A series of new silver(I) derivatives of N-substituted-imidazolidine-2-thiones (L-NR, R = Et, Prn, Bun, Ph), purine-6-thione (purSH2), 2-thiouracil (tucH2), pyrimidine-2-thione (pymSH) and pyridine-2-thione (pySH) of composition [Ag(S-L-NR)(PPh3)2(ONO2)] {R = Et (1), Prn (2), Bun (3), Ph (4)}, [Ag2(N,S-purSH2)2(μ-dppm)2](NO3)2·2H2O (5) (dppm = Ph2P–CH2–PPh2), [Ag(L)(PPh3)2](NO3) {L = N,S-purSH2 (6); S-tucH2 (7)}, [Ag(N,S-pymS)(PPh3)2](CH3OH) (8), and [Ag(N,S-pyS)(PPh3)2] (9) have been synthesized and structurally characterized. These new and some previously reported complexes {[Ag2(L-NH)4(PPh3)2](NO3)2 (10), [Ag(L-NMe)2(PPh3)](NO3) (11), and [Ag(S-bzimSH)2(PPh3)2](OAc) (12), L-NH = 1,3-imidazolidine-2-thione; L-NMe = 1-methyl-3-imidazolidine-2-thione and bzimSH2 = benzimidazoline-2-thione)} have shown moderate to high anti-microbial activity against Gram positive bacteria, namely methicillin resistant Staphylococcus aureus (MRSA) and Staphylococcus aureus (MTCC 740), and Gram negative bacteria, namely Staphylococcus epidermidis (MTCC 435), Enterococcus faecalis (MTCC 439), Shigella flexneri (MTCC 1457) and a yeast Candida albicans (MTCC 22). These complexes have also been found to be bio-safe as studied using MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide] assay. The anti-tumor study of silver complexes against human osteosarcoma cell line (MG63) has shown IC50 values in the range of 6–33 μM.

Graphical abstract: Silver derivatives of multi-donor heterocyclic thioamides as antimicrobial/anticancer agents: unusual bio-activity against methicillin resistant S. aureus, S. epidermidis, and E. faecalis and human bone cancer MG63 cell line

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Publication details

The article was received on 09 Mar 2019, accepted on 15 Apr 2019 and first published on 17 May 2019


Article type: Paper
DOI: 10.1039/C9RA01804B
RSC Adv., 2019,9, 15470-15487
  • Open access: Creative Commons BY-NC license
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    Silver derivatives of multi-donor heterocyclic thioamides as antimicrobial/anticancer agents: unusual bio-activity against methicillin resistant S. aureus, S. epidermidis, and E. faecalis and human bone cancer MG63 cell line

    J. K. Aulakh, T. S. Lobana, H. Sood, D. S. Arora, R. Kaur, J. Singh, I. Garcia-Santos, M. Kaur and J. P. Jasinski, RSC Adv., 2019, 9, 15470
    DOI: 10.1039/C9RA01804B

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