thoxypyridin-3-yl]acetamide wasregiospecifically nitrated and upon reduction and protection of theamino group underwent ring closure to the corresponding pyrazolopyridinederivative. The guanosine analogue was obtained via successive cleavageof the protecting groups.
描述了可被视为 8-aza-3,9-dideazaguanosine 的新型 C-核苷以及相应杂环碱基的合成。N-[4-(2,3,5-三-O-乙酰基-β-D-
呋喃核糖基甲基)-
2-甲氧基吡啶-3-基]乙酰胺被区域特异性硝化,并在
氨基还原和保护后闭环成相应的
吡唑并
吡啶衍生物。通过保护基的连续裂解获得
鸟苷类似物。