The use of solid catalysts to promote organic reactions in water faces the inherent difficulty of the poor mass‐transfer efficiency of organic substances in water, which is often responsible for insufficient reaction and low yields. To solve this problem, the solid surface can be manipulated to become amphiphilic. However, the introduction of surfactant‐like moieties onto the surface of silica‐based materials is not easy. By using an accessible dihydropyran derivative as a grafting linker, a surfactant‐combined bifunctional silica‐based solid catalyst that possessed an ionic liquid tail and a metal acetylacetonate moiety was prepared through a mild Lewis‐acid‐catalyzed ring‐opening reaction with a thiol‐functionalized silica. The surfactant‐combined silica‐supported metal acetylacetone catalysts displayed excellent catalytic activity in water for a range of reactions. The solid catalyst was also shown to be recyclable, and was reused several times without significant loss in activity.

中文翻译：

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用于水中有机反应的双功能固体催化剂：使用二氢吡喃接头同时固定乙酰丙酮配体和两性离子液体“标签”

使用固体催化剂促进水中的有机反应面临固有的困难，即水中有机物的传质效率低，这通常是反应不足和收率低的原因。为了解决这个问题，可以使固体表面变成两亲的。但是，将类似表面活性剂的部分引入二氧化硅基材料的表面并不容易。通过使用易得的二氢吡喃衍生物作为接枝连接剂，通过温和的路易斯酸催化的硫醇基开环反应制备了具有离子液体尾部和乙酰丙酮金属部分的表面活性剂结合的双官能二氧化硅基固体催化剂。功能化的二氧化硅。表面活性剂与二氧化硅结合的金属乙酰丙酮催化剂在水中对一系列反应均表现出出色的催化活性。固体催化剂也被证明是可回收的，并且被重复使用了几次而活性没有明显损失。