Synergistic Effect of a Bis(proazaphosphatrane) in Mild Palladium-Catalyzed Direct α-Arylations of Nitriles with Aryl Chlorides
作者:So Han Kim、Wonseok Jang、Min Kim、John G. Verkade、Youngjo Kim
DOI:10.1002/ejoc.201402466
日期:2014.9
The effect of a bis(proazaphosphatrane) ligand on the palladium-catalyzed direct α-arylation of nitriles with various arylchlorides under mild conditions is reported. Comparisons of the catalytic properties of this ligand with those of three related mono(proazaphosphatrane)s under the same reaction conditions revealed that bis(proazaphosphatrane) displayed a synergistically enhanced activity. In the
P(<i>i</i>-BuNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: An Efficient Ligand for the Direct α-Arylation of Nitriles with Aryl Bromides
作者:Jingsong You、John G. Verkade
DOI:10.1021/jo034779h
日期:2003.10.1
A new catalyst system for the synthesis of alpha-aryl-substituted nitriles is reported. The bicyclic triaminophosphine P(i-BuNCH2CH2)(3)N (1b) serves as an efficient and versatile ligand for the palladium-catalyzed direct alpha-arylation of nitriles with aryl bromides. Using ligand 1b, ethyl cyanoacetate and primary as well as secondary nitriles are efficiently coupled with a wide variety of aryl bromides possessing electron-rich, electron-poor, electron-neutral, and sterically hindered groups.