Pd-catalyzed regiocontrolled Sonogashira and Suzuki cross-coupling reaction of 3,6-dihalogenoimidazo[1,2-a]pyridines: one-pot double-coupling approach
作者:Ahmed El Akkaoui、Ibtissam Bassoude、Jamal Koubachi、Sabine Berteina-Raboin、Abderrahim Mouaddib、Gérald Guillaumet
DOI:10.1016/j.tet.2011.06.108
日期:2011.9
Sonogashira and Suzuki–Miyaura palladium-catalyzed coupling reactions of 3,6-dihalogenoimidazo[1,2-a]pyridines followed by another cross-coupling has been successfully developed. Various solvents, palladium species and bases were tested. Scope and limitations of this regiocontrolled palladium-catalyzed reaction were investigated. The synthesis of 3,6-disubstituted imidazo[1,2-a]pyridine derivatives using
已经成功开发了新的,高效的区域选择性Sonogashira和Suzuki-Miyaura钯催化的3,6-二卤代咪唑并[1,2- a ]吡啶与另一种交叉偶联的偶联反应。测试了各种溶剂,钯物质和碱。研究了该区域控制的钯催化反应的范围和局限性。开发了使用一锅区域选择性双偶联法合成3,6-二取代的咪唑并[1,2- a ]吡啶衍生物。该步骤仅需很少的步骤即可以高收率聚合聚合多取代的化合物。