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Rapid Room-Temperature, Chemoselective Csp2 -Csp2 Coupling of Poly(pseudo)halogenated Arenes Enabled by Palladium(I) Catalysis in Air.
Title Rapid Room-Temperature, Chemoselective Csp2 -Csp2 Coupling of Poly(pseudo)halogenated Arenes Enabled by Palladium(I) Catalysis in Air.
Authors Kalvet, I.; Magnin, G.; Schoenebeck, F.
Journal Angew Chem Int Ed Engl
DOI 10.1002/anie.201609635
Abstract

While chemoselectivities in Pd(0) -catalyzed coupling reactions are frequently non-intuitive and a result of a complex interplay of ligand/catalyst, substrate, and reaction conditions, we herein report a general method based on Pd(I) that allows for an a priori predictable chemoselective Csp2 -Csp2 coupling at C-Br in preference to C-OTf and C-Cl bonds, regardless of the electronic or steric bias of the substrate. The C-C bond formations are extremely rapid (5 min at RT) and are catalyzed by an air- and moisture-stable Pd(I) dimer under open-flask conditions.