Synthesis of novel pyrazolo[3,4-<i>d</i>]pyridazine, pyrido[1,2-<i>a</i>]benzimidazole, pyrimido[1,2-<i>a</i>]benzimidazole and triazolo[4,3-<i>a</i>]pyrimidine derivatives
作者:Mohamed R. Shaaban、Taha M. A. Eldebss、Ahmed F. Darweesh、Ahmad M. Farag
DOI:10.1002/jhet.5570450627
日期:2008.11
afford the novel 3-aroyl-4-(5-methyl-1-phenyl-1H-pyrazol-4-yl)carbonyl-1-phenylpyrazole and 3-aroyl-4-(5-methyl-1-phenyl-1H-pyrazol-4-yl)carbonyl isoxazole derivatives, respectively. It reacts also with 1H-benzimidazole-2-acetonitrile, 2-aminobenzimidazole and 3-amino-1,2,4-triazole to afford the novel pyrido[1,2-a]benzimidazole, pyrimido[1,2-a]benzimidazole and the triazolo[4,3-a]pyrimidine derivatives
4-乙酰基-5-甲基-1-苯基-1 H-吡唑与二甲基甲酰胺二甲基乙缩醛(DMF-DMA)反应,得到相应的(E)1-(5-甲基-1-苯基-1 H-吡唑-4-酰基)-3-(N,N-二甲基氨基)-2-丙烯-1-酮。后者产物与亚硝胺和腈氧化物进行区域选择性的1,3-偶极环加成反应,得到新颖的3-芳酰基-4-(5-甲基-1-苯基-1 H-吡唑-4-基)羰基-1-苯基吡唑和3-芳基-4-(5-甲基-1-苯基-1 H-吡唑-4-基)羰基异恶唑衍生物。它也与1 H-苯并咪唑-2-乙腈,2-氨基苯并咪唑和3-氨基-1,2,4-三唑反应生成新型吡啶并[1,2- a]苯并咪唑,嘧啶并[1,2- a ]苯并咪唑和三唑并[4,3- a ]嘧啶衍生物。3-芳酰基-4-(5-甲基-1-苯基-1 H-吡唑-4-基)羰基-1-苯基吡唑衍生物与水合肼的反应生成新的吡唑并[3,4- d ]哒嗪衍生物。