Improved Functional Group Compatibility in the Palladium-Catalyzed Synthesis of Aryl Amines
作者:Michele C. Harris、Xiaohua Huang、Stephen L. Buchwald
DOI:10.1021/ol0262688
日期:2002.8.1
use of Pd2dba3 with bulky, electron-rich ligands 1 or 2 and LiN(TMS)2 as the base for the coupling of amines with arylhalides containing hydroxyl, amide, or enolizable keto groups is described. This protocol expands the utility of palladium-catalyzed C-N bond formation by allowing for the use of arylhalides containing these functional groups, obviating the need for protecting group manipulations
A New Class of Easily Activated Palladium Precatalysts for Facile C−N Cross-Coupling Reactions and the Low Temperature Oxidative Addition of Aryl Chlorides
作者:Mark R. Biscoe、Brett P. Fors、Stephen L. Buchwald
DOI:10.1021/ja801137k
日期:2008.5.1
one-component Pd precatalysts bearing biarylphosphine ligands is described. These precatalysts are air- and thermally stable, are easilyactivated under normal reaction conditions at or below room temperature, and ensure the formation of the highly active monoligated Pd(0) complex necessary for oxidative addition. The use of these precatalysts as a convenient source of LPd(0) in C-N cross-coupling reactions