Efficient and regioselective functionalization of imidazo[1,2-b]pyridazines via palladium-catalyzed cross-coupling reaction and SNAr
作者:A. El Akkaoui、J. Koubachi、S. El Kazzouli、S. Berteina-Raboin、A. Mouaddib、G. Guillaumet
DOI:10.1016/j.tetlet.2008.02.008
日期:2008.4
The synthesis of 3,6-disubstituted-2-phenylimidazo[1,2-b]pyridazinederivatives by palladium cross-coupling and SNAr reactions is described. Sonogashira and Stille cross-coupling reactions were investigated to introduce alkynyl, alkenyl, and aryl at the 3-position of imidazo[1,2-b]pyridazines. Then, at the 6-position, palladium-catalyzed N-arylation and direct SNAr were used to introduce amines and
3,6-二取代基-2-苯基咪唑并[1,2的合成b ]哒嗪衍生物由钯交叉偶联和S Ñ氩反应进行说明。研究了Sonogashira和Stille的交叉偶联反应,在咪唑并[1,2- b ]哒嗪的3位引入了炔基,烯基和芳基。然后,在6位上,使用钯催化的N-芳基化和直接的S N Ar引入胺和醇。