4-( N -Boc-amino)-1 Н -1,2,3-triazolecarbothioamides,通过4-( N -Boc-amino)-1 Н -1,2,3-triazoles与n -的顺序处理获得BuLi 和烷基异硫氰酸酯在 –78÷–60°C 下与溴乙酸乙酯反应,形成各自的 4- (N -Boc-氨基)-5-硫代亚胺酸酯,在二恶烷中的饱和 НCl 溶液中处理后发生分子内环缩合反应,产生 8 -(烷基亚氨基)-4,8-二氢-1 Н -[1,2,3] triazolo [4,5- e ][1,4]thiazepin-5(6 Н )-ones。
An efficient method for accessing carboannulated and functionalized [1,2,3]triazolo[4,5-b]pyridines
作者:Natalia А. Syrota、Sergiy V. Kemskiy、Andriy V. Bol’but、Igor I. Chernobaev、Mikhailo V. Vovk
DOI:10.1007/s10593-020-02771-9
日期:2020.8
4-(N-Boc-amino)-1,2,3-triazole-5-carbaldehydes upon heating under reflux in acetic acid in the presence of pyrrolidine react with cycloalkanones, acetylacetone, 1,3-cyclohexanediones, and malononitrile resulting in annulation of the pyridine ring with the formation of new derivatives of [1,2,3]triazolo[4,5-b]pyridine.