Chemistry Letters, Vol.45, No.9, 1069-1071, 2016
Synthesis of Benzobis- and Benzotrisbenzofurans by Palladium-Catalyzed Multiple Intramolecular C-H/C-H Coupling
Treatment of diaryloxy- and triaryloxybenzenes in the presence of a Pd(TFA)(2) catalyst and an AgOAc oxidant produces the corresponding benzobis- and benzotrisbenzofurans in good yields through double and triple intramolecular C-H/C-H coupling reactions, respectively.