A simple and convenient protocol for the conversion of aryl/heteroarylboronic acids to corresponding phenols via oxidative hydroxylation has been developed, using titanium dioxide (TiO₂) as heterogeneous catalyst and aqueous hydrogen peroxide as oxidant. The reusability of the said catalyst is assessed and it could be recycled up to 5th consecutive cycles without significant loss of catalytic activity. The reaction pathway is greener with ligand and base free reaction condition, short reaction time, reusable heterogeneous catalytic system and room temperature aqueous reaction medium.

中文翻译：

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二氧化钛是一种高效的多相催化剂，可在室温下快速将芳基/杂芳基硼酸进行C–B键裂解

使用二氧化钛（TiO ₂）作为非均相催化剂和过氧化氢水溶液作为氧化剂，已经开发出一种简单方便的方案，用于通过氧化羟基化将芳基/杂芳基硼酸转化为相应的酚。评估了所述催化剂的可重复使用性，并且可以将其循环使用多达第5个连续循环，而不会显着降低催化活性。反应路径较绿色，具有配体和无碱的反应条件，较短的反应时间，可重复使用的多相催化体系和室温的水性反应介质。