1,3-Dipolar cycloaddition of 2-diazopropane to imidazo[1,2-b]pyridazine derivatives. The synthesis of imidazo[1,2-b]pyrazolo[4,3-d]pyridazines derivatives of a novel heterocyclic system
作者:Branko Stanovnik、Marko Kupper、Miha Tišler、Ivan Leban、Ljubo Golič
DOI:10.1039/c39840000268
日期:——
Facile cycloadditions of 2-diazopropane (2)to the imidazo[1,2]-byridazines (Ia–c), derivatives of a 10π-electron heteroaromatic bicyclic system, give the imidazo[1,2-b]pyrazolo[4,3-d]pyridazines (4a–d)in 69–84% yields.
2-重氮丙烷(2)与10π电子杂芳族双环体系的衍生物咪唑并[1,2]-哒嗪(Ia – c)的简易环加成反应得到咪唑并[1,2-b]吡唑并[4,3]。 -d]哒嗪(4a – d)的产率为69–84%。