Synthesis of Dibenzofurans via Palladium-Catalyzed Phenol-Directed C–H Activation/C–O Cyclization
作者:Bin Xiao、Tian-Jun Gong、Zhao-Jing Liu、Jing-Hui Liu、Dong-Fen Luo、Jun Xu、Lei Liu
DOI:10.1021/ja203335u
日期:2011.6.22
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.
Facile synthesis of enantioenriched phenol-sulfoxides and their aluminum complexes
作者:Yani Tang、Yuji Sun、Jiyong Liu、Simon Duttwyler
DOI:10.1039/c6ob00136j
日期:——
available starting materials. The key synthetic step was the reaction of lithiated arenes with menthyl sulfinates or enantioselective oxidation of a t-butyl sulfide. Well-defined neutral ligand–AlMe2 complexes were obtained by stoichiometric treatment with AlMe3.