A palladium-catalyzed triple coupling of 2-iodoanisoles with aryl iodides has been developed. 3-Methyl-2-pyridone was used as a ligand to accelerate the cross-coupling and suppress the homo-coupling of 2-iodoanisoles. A variety of 6H-dibenzopyran derivatives can be prepared by this method.
L. Chen, S. Cheng, X. Fan, J. Zhu, B. Wang, C. Feng and S. Xiang, Org. Chem. Front., 2022, 9, 4910 DOI: 10.1039/D2QO00738J
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