Reactions of 2-R-6,8-dinitro[1,2,4]triazolo[1,5-a]pyridines with indoles and 1,3-dicarbonyl compounds were studied. It was found that stable products of nucleophilic addition to the pyridine ring were formed under mild conditions in the absence of a base. The new derivatives of 1,5-dihydro[1,2,4]triazolo[1,5-a]pyridine were synthesized in up to 96% yield.

中文翻译：

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高亲电性 6,8-二硝基 [1,2,4] 三唑并 [1,5-a] 吡啶与 C-亲核试剂的反应

研究了2-R-6,8-二硝基 [1,2,4] 三唑并 [1,5- a ] 吡啶与吲哚和 1,3-二羰基化合物的反应。发现在没有碱的情况下，在温和条件下形成稳定的吡啶环亲核加成产物。合成了 1,5-二氢[1,2,4] 三唑并[1,5- a ] 吡啶的新衍生物，产率高达 96%。