Copper-Catalyzed Etherification of Arene C–H Bonds
摘要:
A method for direct, auxiliary-assisted alkoxylation and phenoxylation of beta-sp(2) C-H bonds of benzoic acid derivatives and gamma-sp(2) C-H bonds of amine derivatives is reported. The reaction employs (CuOH)(2)CO3 catalyst, air as an oxidant, phenol or alcohol coupling partner, DMF, pyridine, or DMPU solvent, and K2CO3, tetramethylguanidine, or K3PO4 base at 70-130 degrees C.