Xiao B, Gong TJ, Liu ZJ, Liu JH, Luo DF, Xu J, Liu L.* Synthesis of dibenzofurans via palladium-catalyzed phenol-directed C-H activation/C-O cyclization. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 133,

Abstract A practical, Pd(0)/Pd(II)-catalyzed reaction was developed for phenol-directed C-H activation/C-O cyclization using air as an oxidant. The turnover-limiting step of the process was found to be C-O reductive elimination instead of C-H activation. This reaction can tolerate a variety of functional groups and is complementary to the previous methods for the synthesis of substituted dibenzofurans.......