C-H arylations of 1,2,3-triazoles by reusable heterogeneous palladium catalysts in biomass-derived gamma-valerolactone

C-H arylations were accomplished with a user-friendly heterogeneous palladium catalyst in the biomass-derived gamma-valerolactone (GVL) as an environmentally-benign reaction medium. The userfriendly protocol was characterized by ample substrate scope and high functional group tolerance in the C-H arylation of 1,2,3triazoles, and the palladium catalyst could be recycled and reused in the C-H activation process.