Cu-Catalyzed Arylation of Phenols: Synthesis of Sterically Hindered and Heteroaryl Diaryl Ethers
作者:Debabrata Maiti、Stephen L. Buchwald
DOI:10.1021/jo9026935
日期:2010.3.5
Cu-catalyzed O-arylation of phenols with aryl iodides and bromides can be performed under mild condition in DMSO/K3PO4 with use of picolinic acid as the ligand for copper. This method tolerates a variety of functional groups and is effective in the synthesis of hindereddiaryl ethers and heteroaryl ethers.
铜催化苯酚与芳基碘化物和溴化物的 O-芳基化反应可以在温和条件下在 DMSO/K 3 PO 4 中进行,使用吡啶甲酸作为铜的配体。该方法耐受多种官能团,在受阻二芳基醚和杂芳基醚的合成中有效。
Cu-Catalyzed <i>N</i>- and <i>O</i>-Arylation of 2-, 3-, and 4-Hydroxypyridines and Hydroxyquinolines
作者:Ryan A. Altman、Stephen L. Buchwald
DOI:10.1021/ol062904g
日期:2007.2.1
With use of Cu-based catalysts, 2- and 4-hydroxypyridines were N-arylated in modest to excellent yields. In the case of 2-hydroxypyridine, the use of 4,7-dimethoxy-1,10-phenanthroline, 3, expanded the scope of previous literature reports to include the use of N-containing heteroaryl halides, and 2-substituted aryl halides. In addition, by using a copper catalyst based on 2,2,6,6-tetramethylheptane-3,5-dione, 4, the first N-arylations of 4-hydroxypyridines and O-arylations of 3-hydroxypyridines with aryl bromides and iodides have been accomplished.