2-Phenyl-2-(4-phenyl-1H-1,2,3-triazol-1-yl)ethanol as an Efficient and Versatile Auxiliary Ligand in Copper(II)-Catalyzed Buchwald–Hartwig and Sharpless–Meldal C–N Bond-Forming Reactions

Abstract

A highly active, air-stable, and versatile procedure for Buchwald–Hartwig and Sharpless–Meldal C–N bond formation is reported. Under nearly solvent-free conditions using copper(II) acetate and 2-phenyl-2-(4-phenyl-1H-1,2,3-triazol-1-yl)ethanol, a variety of N-heterocycles and various cyclic and noncyclic secondary amines were arylated to form N-aryl compounds in moderate to excellent yields. This methodology also provides rapid access to diverse 1,4-disubstituted 1,2,3-triazoles in good to excellent yields. All reactions are performed in short times under air.