Biphasic hydrosilylation in ionic liquids: A process set for industrial implementation
Biphasic hydrosilylation in ionic liquids: A process set for industrial implementation
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DOI：
10.1021/ja0612293
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发表时间：
2006-08-02
影响因子：
15
通讯作者：
Dyson, Paul J.
中科院分区：
文献类型：
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作者：
Geldbach, Tilmann J.;Zhao, Dongbin;Dyson, Paul J.
报道了1-十六烯与硅氧烷B 9800在一系列离子液体中的两相硅氢加成反应。在所测试的离子液体中，[C（4）py][BF（4）]和[C（4）-3-pic][BF（4）]提供了活性和催化剂保留之间的最佳折衷。筛选了几种铂预催化剂，发现其中K（2）PtCl（4）和Pt-（PPh（3））（4）性能最好;前者活性最高，而后者具有更高的稳定性和可回收性，并且根据条件的不同，两者都可以提供均相或可溶性纳米颗粒催化剂作为活性物种。改变了许多反应参数，并研究了氧、水和氯化物杂质对反应的影响。此外，由于观察到纳米颗粒催化剂，因此筛选了稳定纳米颗粒的各种策略，但它们都没有导致上级催化体系。
The biphasic hydrosilylation of 1-hexadecene with siloxane B9800 in a range of ionic liquids is reported. Of the ionic liquids tested, [C(4)py][BF(4)] and [C(4)-3-pic][BF(4)] offer the optimum compromise between activity and catalyst retention. Several platinum precatalysts were screened, of which K(2)PtCl(4) and Pt-(PPh(3))(4) were found to give the best performance; the former provides the highest activity, while the latter offers higher stability and recyclability, and depending on the conditions, both can afford either homogeneous or soluble nanoparticle catalysts as the active species. A number of reaction parameters were varied, and the effects of oxygen, water, and chloride impurities on the reaction were studied. In addition, since nanoparticle catalysts were observed, various strategies to stabilize nanoparticles were screened, but none of them resulted in a superior catalytic system.