Abstractmagnified imageA mild, efficient method utilizing a copper‐diamine catalyst at room temperature is reported for the coupling of hindered imidazoles with unsubstituted, ortho‐substituted, and bis‐ortho‐substituted boronic acids in good to excellent yields. Aryl halides do not reaction under these conditions permitting sequential N‐arylation reactions.
Copper-Catalyzed<i>N</i>-Arylation of Hindered Substrates Under Mild Conditions
作者:Michael T. Wentzel、J. Brian Hewgley、Rajesh M. Kamble、Philip D. Wall、Marisa C. Kozlowski
DOI:10.1002/adsc.200800730
日期:2009.4
Abstractmagnified imageA mild, efficient method utilizing a copper‐diamine catalyst at room temperature is reported for the coupling of hindered imidazoles with unsubstituted, ortho‐substituted, and bis‐ortho‐substituted boronic acids in good to excellent yields. Aryl halides do not reaction under these conditions permitting sequential N‐arylation reactions.