The hydrosilylation of alkenes in a supercritical CO2 (scCO2)/ionic liquid (IL) system was investigated. Rh(PPh3)3Cl exhibited excellent catalytic activity and selectivity. KOtBu was used as an additive, and no hydrogenation by-product (alkane) was detected in the scCO2/IL system. During hydrosilylation in the scCO2/IL system, the reactants were possibly transferred into the IL phase by scCO2, in which the catalyst was dissolved. The products can be flushed with scCO2 after the reaction and the catalyst/IL system reused.
在超临界
二氧化碳(scCO2)/
离子液体(IL)体系中研究了烯烃的氢
硅化反应。Rh(PPh3)3Cl表现出优异的催化活性和选择性。KOtBu作为添加剂,在scCO2/IL体系中未检测到氢化副产物(
烷烃)。在scCO2/IL体系中进行氢
硅化反应时,反应物可能通过scCO2转移到IL相中,催化剂在该相中溶解。反应后,产物可通过scCO2冲洗,催化剂/IL体系可重复使用。