Palladium Catalyzed C-I and Vicinal C-H Dual Activation of Diaryliodonium Salts for Diarylation: Synthesis of 4,5-Benzocoumarins.

Organic letters

PubMedID: 26523622

Wu X, Yang Y, Han J, Wang L. Palladium Catalyzed C-I and Vicinal C-H Dual Activation of Diaryliodonium Salts for Diarylation: Synthesis of 4,5-Benzocoumarins. Org Lett. 2015;.
With a strategy that makes use of palladium activation of both C-I and vicinal C-H bonds of diaryliodonium salts, an unprecedented approach in diarylation of coumarins was reported. As such, a wide range of 4,5-benzocoumarins with potential fluorescence properties have been synthesized in good yields. A series of experiments suggested that the formation of two carbon-carbon bonds proceeded in a synergetic manner.