Copper-Catalyzed Diaryl Ether Formation from (Hetero)aryl Halides at Low Catalytic Loadings
作者:Yuntong Zhai、Xiaofei Chen、Wei Zhou、Mengyang Fan、Yisheng Lai、Dawei Ma
DOI:10.1021/acs.joc.7b00493
日期:2017.5.5
Diaryl formation is achieved by coupling phenols and (hetero)aryl halides under the catalysis of CuI/N,N′-bis(2-phenylphenyl) oxalamide (BPPO) or CuI/N-(2-phenylphenyl)-N′-benzyl oxalamide (PPBO) at 90 °C using DMF or MeCN as the solvent. Only 0.2–2 mol % CuI and ligand are required for complete conversion, which represents the lowest catalytic loadings for a general Cu/ligand-catalyzed diaryl ether
通过在CuI / N,N'-双(2-苯基苯基)草酰胺(BPPO)或CuI / N-(2-苯基苯基)-N'-苄基草酰胺的催化下偶联酚和(杂)芳基卤化物来形成二芳基(PPBO)在90°C下使用DMF或MeCN作为溶剂。完全转化仅需要0.2–2 mol%的CuI和配体,这代表了通常的Cu /配体催化的二芳基醚形成的最低催化负载量。