4,5-Diazafluorene N-glycopyranosyl hydrazones as scaffolds for potential bioactive metallo-organic compounds: Synthesis,structural study and cytotoxic activity |
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Institution: | 1. Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia;2. Faculty of Science, Universiti Tunku Abdul Rahman, 31900 Kampar, Perak, Malaysia;3. Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia;4. Department of Biological Sciences, Sunway University, 47500 Bandar Sunway, Malaysia |
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Abstract: | A series of novel N1-(4,5-diazafluoren-9-yliden)-N2-glycopyranosyl hydrazines was prepared in synthetically useful yields by treatment of 9H-4,5-diazafluoren-9-hydrazone with different unprotected monosaccharides. The reactions with the monosaccharides tested afforded stereoselectively, and exclusively, cyclic derivatives, whose structures correspond to N-β-glycopyranosyl hydrazones except for the d-arabinose derivative that agrees with the α-anomer. Several copper(II) complexes having a 2:1 ligand to metal mole ratio were also prepared. The metal complexes can bind DNA sequences and preferentially stabilize G-quadruplex DNA structures over dsDNA. The fucose, rhamnose and deoxyglucose copper(II) complexes exhibited a cytotoxic activity against cultured HeLa and PC3 tumor cells comparable to other metal complexes normally used for chemotherapeutic purposes, such as cisplatin. |
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Keywords: | 4 5-Diazafluorene derivatives Copper(II) complexes Cytotoxic activity DNA interactions |
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