A new and readily available bidentate ligand, namely, pyrrolidine-2-phosphonicacidphenylmonoester (PPAPM), has been developed for the copper-catalyzedformation of C-N, C-O, and P-C bonds, and various N-, O-, and P-arylation products were synthesized in good to excellent yields by using the CuI/PPAPM catalyst system. Addition of the PPAPM ligand greatly increases the reactivity of the copper catalyst
Pd-catalyzed oxidative acylation of 2-phenoxypyridines with alcohols via C–H bond activation
作者:Minyoung Kim、Satyasheel Sharma、Jihye Park、Mirim Kim、Yeonhee Choi、Yukyoung Jeon、Jong Hwan Kwak、In Su Kim
DOI:10.1016/j.tet.2013.06.008
日期:2013.8
A palladium-catalyzedoxidativeacylation of 2-phenoxypyridines with benzylic and aliphatic alcohols via C–H bondactivation is described. This protocol represents direct access to biologically active ortho-acylphenol derivatives, and provides new opportunities to use readily available alcohols as starting materials for catalytic acylation reactions.
A simple, metal- and ligand-free procedure for the Ullmann-type C–O coupling reactions has been achieved by allowing aryl bromides to react with a variety of phenols in the presence of t-BuOK. Moderate to excellent yields of O-arylation products are obtained under mild conditions in a short time. In addition, two examples of C–N coupling reactions are also reported. A benzyne mechanism is proposed
<i>Para</i>-Selective Cu-Catalyzed C–H Aryloxylation of Electron-Rich Arenes and Heteroarenes
作者:Igors Sokolovs、Edgars Suna
DOI:10.1021/acs.joc.5b02728
日期:2016.1.15
Cu-catalyzed reaction of phenols with electron-rich arene or heteroarene ligands of unsymmetrical diaryl-λ3-iodanes is a key step in the developed one-pot two-step method for intermolecular para-selective C–H aryloxylation of heteroarenes and arenes.