Direct Arylation of Imidazo[1,2-<i>b</i>]pyridazines: Microwave-Assisted One-Pot Suzuki Coupling/Pd-Catalysed Arylation
作者:Ahmed El Akkaoui、Sabine Berteina-Raboin、Abderrahim Mouaddib、Gérald Guillaumet
DOI:10.1002/ejoc.200900849
日期:2010.2
Direct intermolecular C-H arylation of 6-chloroimidazo[1,2-b]-pyridazine in its 3-position was achieved, and the tolerance to reaction conditions in the presence of chloro groups was investigated. Various 3-(hetero)arylimidazo[1,2-b]pyridazines were synthesized in good to excellent yields. This methodology was successfully applied to the synthesis of 3,6-di-and 2,3,6-trisubstituted imidazo[1,2-b]pyridazines
实现了 6-氯咪唑并[1,2-b]-哒嗪在其 3-位的直接分子间 CH 芳基化,并研究了在氯基团存在下对反应条件的耐受性。各种 3-(杂)芳基咪唑并 [1,2-b] 哒嗪以良好到极好的产率合成。该方法通过微波辅助、一锅、两步 Suzuki 交叉偶联成功应用于合成 3,6-二和 2,3,6-三取代咪唑并[1,2-b]哒嗪/钯催化的芳基化过程。