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Catalyst- and solvent-free ipso-hydroxylation of arylboronic acids to phenols

机译：无催化剂和无溶剂芳基硼酸的ipso-羟基化为苯酚

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A catalyst-free method for the hydroxylation of arylboronic acids to form the corresponding phenols with sodium perborate as the oxidant was developed using water as the solvent. Under the reaction conditions, the yield of phenol reached 92% at only 5 min. Moreover, the reaction could be conducted without a catalyst under the solvent-free condition, the efficiency of which was as high as that of a liquid-phase reaction. Using a microcalorimeter, the reaction was found to be an exothermic reaction. The reaction mechanism was investigated and understood via DFT calculations, which revealed that it was a nucleophilic reaction.
机译：以水为溶剂，开发了一种以过硼酸钠为氧化剂将芳基硼酸羟基化形成相应酚的无催化剂方法。在反应条件下，仅5分钟苯酚的产率达到92％。而且，该反应可以在无催化剂的条件下在无溶剂条件下进行，该催化剂的效率与液相反应的效率一样高。使用微量热计，发现该反应是放热反应。通过DFT计算研究并理解了反应机理，结果表明这是亲核反应。

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