Synthesis of some 1,3-disubstituted imidazo[1,5-a]pyridines using 2-cyanopyridine
作者:Vijendra Kumar Fulwa、Vadivelu Manivannan
DOI:10.1016/j.tetlet.2012.03.001
日期:2012.5
with pyridine-2-carboxaldehyde yielded a red semi-solid. On adding aqueous KOH, a mixture of 1-(3,5-bis(2-pyridyl)-1,2,4-triazolyl)-3-(2-pyridyl)imidazo[1,5-a]pyridine (2a) and 1-((2-pyridyl)methanimine)-3-(2-pyridyl)imidazo[1,5-a]pyridine (2b) precipitated and from the filtrate 3,5-bis(2-pyridyl)-1,2,4-triazole (1) was isolated. Similar compounds were obtained from two other pyridinecarboxaldehydes
将2-氰基吡啶和水合肼在100°C加热,并将所得液体与吡啶-2-羧醛再加热,得到红色半固体。在添加KOH水溶液时,1-(3,5-双(2-吡啶基)-1,2,4-三唑基)-3-(2-吡啶基)咪唑并[1,5- a ]吡啶(2a)的混合物并从滤液中沉淀出1-((2-吡啶基)甲亚胺)-3-(2-吡啶基)咪唑并[1,5- a ]吡啶(2b),并从滤液3,5-双(2-吡啶基)-1,2分离出4-4-三唑(1)。从另外两种吡啶甲醛中获得了类似的化合物。