1,2,3-Triazol-5-ylidene–palladium complex catalyzed Mizoroki–Heck and Sonogashira coupling reactions
作者:Sayuri Inomata、Hidekatsu Hiroki、Takahiro Terashima、Kenichi Ogata、Shin-ichi Fukuzawa
DOI:10.1016/j.tet.2011.07.045
日期:2011.9
The bis-1,4-dimesityl-1,2,3-triazol-5-ylidene–palladium complex (1a) successfully catalyzes the Mizoroki–Heck and Sonogashira coupling reactions with aryl bromides to give the corresponding alkenes and alkynes, respectively, in good to excellent yields. In the Mizoroki–Heck reaction, electron-rich, electron-poor, and functionalized aryl bromides and alkenes are tolerated, while the substrates are limited
bis-1,4-dimesityl-1,2,3-triazol-5- ylidene-钯络合物(1a)成功催化了Mizoroki-Heck和Sonogashira与芳基溴的偶联反应,分别得到相应的烯烃和炔烃好到极好的产量。在Mizoroki-Heck反应中,可以耐受富电子,贫电子和官能化的芳基溴化物和烯烃,而在Sonogashira偶联反应中,底物仅限于贫电子的芳基卤化物。在特定条件下,钯配合物还催化与芳基氯的交叉偶联反应,从而获得比bis-IMes-Pd配合物类似物更高的产品收率(2)。