One-Pot, Selective Hydroformylation, Condensation, and Hydrogenation Processes by a Sol-Gel Entrapped Rhodium Complex, an Immobilized Base, and an Ionic Liquid
作者:Khalil Hamza、Herbert Schumann、Jochanan Blum
DOI:10.1002/ejoc.200801258
日期:2009.4
derivatives are selectively hydroformylated to give branched aldehydes, which in turn, are condensed with reactive methylene compounds (malononitrile, ethyl cyanoacetate), and then hydrogenated. The process takes place at 80 °C under 20.7 bar H2 and 20.7 bar CO in the presence of [Rh(cod)Cl]2 and Na[Ph2P-3-(C6H4SO3)], which have been co-entrapped within ionic liquid confined silica sol–gel together with
我们报告了一种一锅多步工艺,其中苯乙烯衍生物被选择性加氢甲酰化以产生支化醛,而支链醛又与反应性亚甲基化合物(丙二腈、氰基乙酸乙酯)缩合,然后氢化。该过程在 80 °C 和 20.7 bar H2 和 20.7 bar CO 下在 [Rh(cod)Cl]2 和 Na[Ph2P-3-(C6H4SO3)] 存在下进行,它们已被共包埋在离子液体中硅溶胶-凝胶与单独封装的底座一起。催化剂至少可以重复使用四次,但每次运行后必须更新碱。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)