Synthesis, antimicrobial activity and cytotoxicity of triphenylphosphonium (TPP) conjugates of 1,2,3-triazolyl nucleoside analogues.

Four new triphenylphosphonium (TPP) conjugates of 1,2,3-triazolyl nucleoside analogues were synthesized by coupling with 8-bromoctyl- or 10- bromdecyltriphenylphosphonium bromide and evaluated for the in vitro antibacterial activity against S. aureus, B. cereus, E. faecalis, two MRSA strains isolated from patients and resistant to fluoroquinolone antibiotic ciprofloxacin and β-lactam antibiotic amoxicillin, E. coli, antifungal activity against T. mentagrophytes C. albicans and cytotoxicity against human cancer cell lines M-HeLa, MCF-7, A549, HuTu-80, PC3, PANC-1 and normal cell line Wi-38. In these compounds a TPP cation was attached via an octyl or a decyl linker to the N 3 atom of the heterocycle moiety (thymine, 6-methyluracil, quinazoline-2,4-dione) which was bonded with 2',3',5'-tri- O - acetyl-greek beta-d-ribofuranose residue by the (1,2,3-triazol-4-il)methyl bridge. All synthesized compounds showed high antibacterial activity against S. aureus within the range of MIC values 1.2-4.3 greek muM, and three of them appeared to be bactericidal with respect to tis bacterium at MBC values 4.1-4.3 greek muM. Two lead compounds showed both high antibacterial activity against the MRSA strains resistant to Ciprofloxacin and Amoxicillin within the range of MIC values 1.0-4.3 greek muM and high cytotoxicity against human cancer cell lines HuTu-80 and MCF-7 within the range of IC

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