readily synthesized from N-(pyridin-2-yl)benzimidamides via phenyliodine bis(trifluoroacetate)-mediated intramolecular annulation. This novel strategy allows for the convenient construction of a 1,2,4-triazolo[1,5-a]pyridine skeleton through direct metal-free oxidative N–N bond formation, featuring a short reaction time and high reaction yields.
具有生物学重要性的1,2,4-三唑并[1,5- a ]吡啶很容易通过苯基碘双(三氟乙酸)介导的分子内环化反应从N-(吡啶-2-基)苯甲酰胺酰胺合成。这种新颖的策略允许通过直接形成无金属的氧化性N–N键来方便地构建1,2,4-三唑并[1,5- a ]吡啶骨架,其反应时间短且反应产率高。