Highly efficient heterogenous catalyst for O-arylation of phenols with aryl halides using natural ferrous chamosite

Natural ferrous chamosite-catalyzed arylation of phenols with aryl iodides and bromides afforded the corresponding ethers in moderate to excellent yields. This ligand-free, natural catalyst catalyzed coupling of aryl iodides and aryl bromides with phenols resulted in high yields of diaryl ether formation in the absence of any additive. The catalyst was quantitatively recovered from the reaction by a simple filtration and reused for a number of cycles.