Studies ON Epimeric-D-<i>asabino</i>-and-D-<i>ribo</i>-tetritol-1-yl-2-phenyl-2 <i>H</i>-1,2,3-triazoles. Synthesis and Anomeric Configuration of 4-(α-and β-D-Erythrofuranosyl)-2-phenyl-2 <i>H</i>-1,2,3-Triazole <i>C</i>-Nucleoside Analogs
作者:Mohammed A.E. Sallam、Farida F. Louis、John M. Cassady
DOI:10.1080/07328319808004674
日期:1998.4
Treatment of 4-(D-arabino-tetritol-1-yl)-2-phenyl-2 H-1,2,3-triazole (1) with one mole equivalent of tosyl chloride in pyridine solution, afforded the C-nucleoside analogs, 4-(alpha-D-erythrofuranosyl)-2-phenyl-2 H-1,2,3-triazole (2) in 25% yield, as well as the byproduct 4-(4-chloro-4-deoxy-D-arabino-tetritol-1-yl)-2-phenyl-2 H-1,2,3-triazole(3). Treatment of the epimeric 4-(D-ribo-tetritol-1-yl)-2-phenyl-2 H-1,2,3-triazole(8) with tosyl chloride in pyridine solution afforded the anomeric C-nucleoside analogs, 4-(beta-D-erythrofuranosyl)-2-phenyl-2 H-1,2,3-triazole (9) in 23% yield. Similar treatment of 8 with trifluoromethanesulfonyl chloride in pyridine solution afforded 9. The structure and anomeric configuration of these compounds were determined by acylation, NMR, NOE, circular dichroism spectroscopy and mass spectrometry.