Synthetic Access to 2-Amido-5-aryl-8-methoxy-triazolopyridineand 2-Amido-5-morpholino-8-methoxy-triazolopyridine Derivativesas Potential Inhibitors of the Adenosine Receptor Subtypes
作者:Matthias Nettekoven、Bernd Püllmann、Sébastien Schmitt
DOI:10.1055/s-2003-40874
日期:2003.8
Two versatile and complementary synthetic strategies towards 2-amido-5-aryl-8-methoxy-triazolopyridine derivatives and 2-amido-5-morpholino-8-methoxy-triazolopyridine derivatives in five steps are presented. The key step in each synthetic route can be constituted as the formation of the respective triazolopyridine derivative precursors in 78% and 57% yield, respectively, through an intermediately formed 4H-[1,2,4]oxadiazol-5-one. The final Suzuki coupling/amidation allowed the straightforward access to the desired triazolopyridine derivatives which have not been described previously. Notably, these triazolopyridine-scaffold bears three vectors of diversity which offer maximum flexibility in design and combinatorial synthesis of molecules with a potentially useful inhibitory activity towards adenosine receptor subtypes.
本文介绍了两种多功能且互补的合成策略,通过五个步骤制备2-酰胺基-5-芳基-8-甲氧基三唑并吡啶衍生物和2-酰胺基-5-吗啉基-8-甲氧基三唑并吡啶衍生物。每条合成路径的关键步骤是通过中间生成的4H-[1,2,4]二唑-5-酮,分别以78%和57%的产率形成各自的三唑并吡啶衍生物前体。最终的铃木偶联/酰胺化反应使得可以直接获得之前未曾报道过的目标三唑并吡啶衍生物。值得注意的是,这些三唑并吡啶骨架具有三个多样性向量,为设计和组合合成具有潜在阻断腺苷受体亚型活性分子的合成提供了最大的灵活性。