Antimicrobial Evaluation of New Synthesized Pyridine Nucleosides Under Solvent-Free Conditions
作者:Nora M. Rateb、Hany A. El-Deab、Ibrahim M. Abdou
DOI:10.1080/15257770.2013.827206
日期:2013.9.2
Two series of novel 3-cyano-2-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyloxo) pyridines and 3-cyano-2-(2,3,5-tri-O-acetyl-beta-D-ribofuranosyloxy)-4-trifluromethyl-6-phenyl pyridine were synthesized using efficient microwave methods. The targeted compounds were obtained in high yields by reacting 2-(1H)-pyridone or its salt with activated sugars using SiO2 under solvent-free conditions. Ammonolysis of the resulted acetylated nucleosides produced 3-cyano-2-(b beta-D-glucopyranosyloxo)-pyridines and 3-cyano-2-(beta-D-ribofuranosyloxy)-4-trifluoromethyl-6-phenyl pyridine. These new products were fully characterized using 1D and 2D NMR. These compounds were screened for their antibacterial activities against G(+) and G(-) bacteria and some found to exhibit better antibacterial activities than the control drug.