available MgO and anion exchange resins. This catalyst also acts as a heterogeneous catalyst for the epoxidation of electron-deficient olefins with hydrogen peroxide. Further, the catalyst/product(s) separation can be easily carried out by the simple filtration (or centrifugation) and the reaction is immediately stopped by the removal of the solid catalyst, suggesting that the nature of the observed
通过将N-辛基二氢
咪唑鎓氢氧化物片段共价锚定在SiO 2(表示为1 -OH / SiO 2)上,已经合成了固定化的有机催化剂。该催化剂对各种羰基化合物与三甲基甲
硅烷基
氰化物(Me 3SiCN)。在温和的反应条件下,相应的三甲基甲
硅烷基醚的产率高至优异,证明了该系统的有效性,该产率优于用市售MgO和阴离子交换
树脂获得的产率。该催化剂还用作缺电子烯烃与
过氧化氢环氧化的非均相催化剂。此外,通过简单的过滤(或离心分离)可以容易地进行催化剂/产物的分离,并且通过除去固体催化剂可以立即停止反应,这表明所观察到的催化的性质实际上是非均质的。