CO Cross-Coupling of Activated Aryl and Heteroaryl Halides with Aliphatic Alcohols
作者:Peter E. Maligres、Jing Li、Shane W. Krska、John D. Schreier、Izzat T. Raheem
DOI:10.1002/anie.201203460
日期:2012.9.3
A robust and general catalyst system facilitates the alkoxylation of activatedheteroarylhalides with primary, secondary, and select tertiary alcohols without the need for an excess of either coupling partner (see scheme). This catalyst system displays broad functional‐group tolerance and excellent regioselectivity, and is insensitive to the order of reagent addition.
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.
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.