Karimi Babak, Enders Dieter
Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), P.O. Box 45195-1159, Gava Zang, Zanjan, Iran.
Org Lett. 2006 Mar 16;8(6):1237-40. doi: 10.1021/ol060129z.
[reaction: see text] A new concept of simultaneous covalent anchoring of a N-heterocyclic carbene palladium/ionic liquid matrix on the silica surface and the application of the resulting catalyst in the Heck reaction of a variety of different haloarenes is described. The catalyst shows high thermal stability (up to 280 degrees C) and could be recovered and reused for four reaction cycles, giving a total TON congruent with 36 600. Furthermore, TEM coupled with EDX analysis indicate the formation of Pd nanoparticles within the immobilized IL layer.
[反应：见正文] 描述了一种在二氧化硅表面同时共价锚定N-杂环卡宾钯/离子液体基质的新概念，以及所得催化剂在各种不同卤代芳烃的Heck反应中的应用。该催化剂表现出高热稳定性（高达280℃），并且可以回收并重复用于四个反应循环，总TON达到36600。此外，透射电子显微镜（TEM）结合能谱分析（EDX）表明在固定化离子液体层内形成了钯纳米颗粒。
