Reductive Buchwald‐Hartwig Amination of Nitroarenes with Aryl (pseudo)Halides
作者:Tian Cao、Yi‐Peng Luo、Long Cheng、Jia‐Li Zhao、Qiao‐Sen Jia、Shu Zhang、Xiang‐Wei Liu
DOI:10.1002/ejoc.202300494
日期:2023.8.21
syntheses of diarylamines from a palladium-catalyzed reductive Buchwald-Hartwig amination of nitroarenes with aryl (pseudo)halides is developed. The use of upstream nitroarenes as arylamine surrogates, the judicious selection of bis(pinaco-lato)diboron (B2pin2) as a stoichiometric reducing agent, wide substrate scope including (hetero)arylhalides (Cl, Br and I) and aryl triflates, constitute the striking
Water-Mediated Catalyst Preactivation: An Efficient Protocol for C−N Cross-Coupling Reactions
作者:Brett P. Fors、Philipp Krattiger、Eric Strieter、Stephen L. Buchwald
DOI:10.1021/ol801285g
日期:2008.8.21
A protocol for forming a highly active Pd(0) catalyst from Pd(OAC)(2), water, and biaryldialkylphosphine ligands has been developed. This protocol generates a catalyst system, which exhibits excellent reactivity and efficiency in the coupling of a variety of amides and anilines with aryl chlorides.
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