A Single Phosphine Ligand Allows Palladium-Catalyzed Intermolecular CO Bond Formation with Secondary and Primary Alcohols
作者:Xiaoxing Wu、Brett P. Fors、Stephen L. Buchwald
DOI:10.1002/anie.201104361
日期:2011.10.10
Forging a bond: An efficient, general palladium catalyst for CObond‐forming reactions of secondary and primaryalcohols with a range of aryl halides has been developed using the ligand 1. Heteroaryl halides, and for the first time, electron‐rich aryl halides can be coupled with secondaryalcohols. A diverse set of substrate combinations are possible with just a singleligand, thus obviating the need
形成键:使用配体1开发了一种高效、通用的钯催化剂,用于仲醇和伯醇与一系列芳基卤化物的C O 键形成反应。杂芳基卤化物和富电子芳基卤化物首次可以与仲醇偶联。只需一个配体即可实现多种底物组合,因此无需调查多个配体。
Synthesis and Application of Palladium Precatalysts that Accommodate Extremely Bulky Di-<i>tert</i>-butylphosphino Biaryl Ligands
作者:Nicholas C. Bruno、Stephen L. Buchwald
DOI:10.1021/ol401208t
日期:2013.6.7
A series of palladacyclic precatalysts that incorporate electron-rich di-fert-butylphosphino biaryl ligands is reported. These precatalysts are easily prepared, and their use provides a general means of employing bulky ligands in palladium-catalyzed cross-coupling reactions. The application of these palladium sources to various C-N and C-O bond-forming processes is also described.
Described are palladium precatalysts, and methods of making and using them. The palladium precatalysts show improved stability and improved reactivity in comparison to previously-described palladium precatalysts.