Transition metal catalysis in fluorous media: extension of a new immobilization principle to biphasic and monophasic rhodium-catalyzed hydrosilylations of ketones and enones
作者:Long V. Dinh、J.A. Gladysz
DOI:10.1016/s0040-4039(99)01924-3
日期:1999.12
(biphasic conditions, 60°C) or hexanes or ether (monophasic conditions, 28–60°C) solutions of PhMe2SiH and cyclic enones or ketones. Samples are cooled to room temperature or −30°C, and simple organic/fluorous phase separations remove products from the catalyst, which can be directly reused without loss of activity.
标题方案利用ClRh [P(CH 2 CH 2(CF 2)n -1 CF 3)3 ](in3)(n = 6,8; 0.8-0.2 mol%)和甲苯的CF 3 C 6 F 11溶液PhMe 2 SiH和环状烯酮或酮(双相条件,60°C)或己烷或乙醚(单相条件,28–60°C)溶液。将样品冷却至室温或-30°C,简单的有机/氟相分离从催化剂中除去产物,这些产物可直接重复使用而不会损失活性。