An Efficient Single Step Synthesis of Pyridazine, Pyrazolo[5,1-c]-1,2,4-triazine, 1,2,4-Triazolo[5,1-c]-1,2,4-triazine and 1,2,4-Triazino[4,3-a]benzimidazole Derivatives
作者:Ahmad M. Farag、Mohamed R. Shaaban、Tamer S. Saleh
DOI:10.3987/com-08-11559
日期:——
Coupling of E-1-(l-methylbenzimidazol-2-yl)-3-(N,N-dimethylamino)prop-2-enone (1) with the arenediazonium salt gave hydrazonopropanal 5 which underwent cyclocondensation with active methylene compounds to afford substituted pyridazin-6-imine 8 and 11. The enaminone 1 coupled also with the diazonium salts prepared from aminopyrazole, aminotriazole and 2-amino-1H-benzimidazole to afford pyrazolo[5,l-c]-l
E-1-(1-甲基苯并咪唑-2-基)-3-(N,N-二甲氨基)丙-2-烯酮(1)与芳基重氮盐偶联得到肼基丙醛5,其与活性亚甲基化合物进行环缩合得到取代的哒嗪-6-亚胺 8 和 11。烯胺酮 1 还与由氨基吡唑、氨基三唑和 2-氨基-1H-苯并咪唑制备的重氮盐偶联,得到吡唑并[5,lc]-1,2,4-三嗪 15, 1 ,2,4-三唑并[5,1-c]-1,2,4-三嗪19、1,2,4-三嗪[4,3-a]苯并咪唑23衍生物。