Heterogeneous Palladium-Catalyzed Synthesis of Aromatic Ethers by Solvent-Free Dehydrogenative Aromatization: Mechanism, Scope, and Limitations Under Aerobic and Non-Aerobic Conditions
作者:Marc Sutter、Romain Lafon、Yann Raoul、Estelle Métay、Marc Lemaire
DOI:10.1002/ejoc.201300485
日期:2013.9
derivatives and alcohols, both non-aromatic precursors, aryl ethers could be synthesized in good yields and with good selectivities in the presence of a catalytic amount of Pd/C, in one step, without added solvent, in a reaction vessel open to air. For less reactive substrates, the addition of 1-octene in a closed system under non-aerobic conditions improved the conversion. In addition, the catalyst could
以环己酮衍生物和醇为原料,这两种非芳香族前体,芳醚可以在催化量的 Pd/C 存在下以良好的产率和良好的选择性在一个步骤中合成,无需添加溶剂,在打开的反应容器中空气。对于反应性较低的底物,在非有氧条件下在封闭系统中添加 1-辛烯可提高转化率。此外,催化剂可以循环多次使用,芳醚收率没有下降。该方法也用于四氢萘酮衍生物和多元醇。进行了几个反应以提出这种转化的机制。形成烯醇醚,然后进行脱氢反应似乎是该反应的关键步骤。