1-(2-deoxy-β-D-ribofuranosyl)-2-oxo-2,3-dihydro-1H-imidazole-4-carboxamide 在
吡啶 、
silica gel 作用下,
反应 4.0h,
生成 1-(2-deoxy-3-(4-chlorophenyl)phosphate-5-O-(4,4'-dimethoxytrityl)-β-D-ribofuranosyl)-2-oxo-4-imidazoline-4-carboxamide triethylammonium salt