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首页> 外文期刊>RSC Advances >Kinetic investigation on the highly efficient and selective oxidation of sulfides to sulfoxides and sulfones with t-BuOOH catalyzed by La2O3
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Kinetic investigation on the highly efficient and selective oxidation of sulfides to sulfoxides and sulfones with t-BuOOH catalyzed by La2O3

机译：La2O3催化的t-BuOOH将硫化物高效选择性氧化为亚砜和砜的动力学研究

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摘要

The selective oxidation of various sulfides to sulfoxides by a simple, efficient, and environmentally benign method is of prime focus. In this paper, we have explored a highly efficient protocol for the oxidation of alkyl aryl sulfides to sulfoxides with high selectivities catalyzed by La2O3 in the presence of 70% t-BuOOH solution (water). We obtained predominantly the monooxygenated product. The over oxidation of sulfides to sulfones was not observed under these conditions. The resulting products are obtained in good to excellent yields within a reasonable time without the use of ligands and other additives. The epoxidation of the double bond as well as allylic oxidation are not observed with allyl sulfides. Sulfones can be obtained quantitatively by altering the reaction conditions. The surface morphology and the catalyst reusability were verified by XRD, AFM and SEM techniques. The surface area of the La2O3 was measured using BET isotherms.
机译：通过简单，有效且对环境无害的方法将各种硫化物选择性氧化为亚砜是首要目标。在本文中，我们探索了在70％t-BuOOH溶液（水）存在下，由La2O3催化的具有高选择性的烷基芳基硫醚氧化为亚砜的高效方案。我们主要获得单加氧产物。在这些条件下未观察到硫化物过度氧化为砜。在不使用配体和其他添加剂的情况下，在合理的时间内以良好的产率获得了极好的产品。用烯丙基硫未观察到双键的环氧化以及烯丙基氧化。可以通过改变反应条件来定量获得砜。通过XRD，AFM和SEM技术验证了表面形貌和催化剂的可重复使用性。 La2O3的表面积使用BET等温线测量。

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