氟膦化合物P [(CH 2)m R f n ] 3(R f n =(CF 2)n -1 CF 3;m / n = 2 / 8,3 / 8,3/10)是有效的亲核催化剂迈克尔加成反应。基于它们高度依赖温度的溶解度(热同质性),可以轻松地对其进行回收,并通过简单的液相/固相分离进行回收。由亲核膦与α,β-不饱和体系反应形成的phospho盐似乎是催化剂静止状态的重要组成部分。
Syntheses and Carbonyliridium Complexes of Unsymmetrically Substituted Fluorous Trialkylphosphanes: Precision Tuning of Electronic Properties, Including Insulation of the Perfluoroalkyl Groups
作者:Luke J. Alvey、Ralf Meier、Tibor Soós、Paul Bernatis、John A. Gladysz
substituted phosphane P[(CH2)mRf8]3 (m = 5, 6) is similarly prepared from PH3 and H2C=CHCH2CH2CH2Rf8, analogously to previously reported homologs [m = 2 (2), 3 (4), 4 (5)]. Reactions of 10−13 and 2, 4, 5, and 6 with [Ir(COD)Cl]2 and CO give trans-Ir(CO)(Cl)(PR2R′)2 (70−83%). The IR νCO values show a monotonic decrease with increasing numbers of CH2 groups. Phosphanes 13, 5, and 6 have the most CH2 groups,