TBAB-Promoted Ligand-Free Copper-Catalyzed Cross-Coupling Reactions of Aryl Halides with Arylboronic Acids

摘要

Tetrabutylammoniurn bromide (TBAB) was found to improve the ligand-free copper-catalyzed cross-couplings of aryl halides with arylboronic acids. In the presence of 10 mol% of Cul and 20 mol% of TBAB, a variety of aryl halides underwent the coupling with arylboronic acids smoothly to afford the corresponding products in moderate to good yields.