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。
Use of Tunable Ligands Allows for Intermolecular Pd-Catalyzed C−O Bond Formation
作者:Andrei V. Vorogushin、Xiaohua Huang、Stephen L. Buchwald
DOI:10.1021/ja050471r
日期:2005.6.1
Pd-catalyzed C-O coupling reactions of aryl halides with primary and secondary alcohols by promoting reductive elimination at the expense of beta-hydride elimination. The key to their success is the ability to match the size of the ligand to that of the combination of substrates. The efficient coupling of a number of unactivated aryl chlorides and bromides with cyclic and acyclicsecondary alcohols was achieved
庞大的联芳基膦配体通过促进还原消除以消除 β-氢化物为代价,促进了 Pd 催化的芳基卤化物与伯醇和仲醇的 CO 偶联反应。它们成功的关键是能够将配体的大小与底物组合的大小相匹配。实现了许多未活化的芳基氯化物和溴化物与环状和非环状仲醇的有效偶联。这包括首次在 Pd 催化的偶联过程中偶联烯丙醇。