Rhodium-Catalyzed Hydrogenation of Alkenes by Rhodium/Tris(fluoroalkoxy)phosphane Complexes in Fluorous Biphasic System
作者:Denis Sinou、David Maillard、Ali Aghmiz、Anna M. Masdeu i-Bultó
DOI:10.1002/adsc.200202122
日期:2003.5
of methyl cinnamate, the most active catalyst being the rhodium complex containing the phosphane with the p-fluorous ponytail. Recycling of the fluorous catalyst was possible, particularly using the p-substituted phosphane, where no significant loss of catalyst or activity was observed, and generally with very low leaching of rhodium or phosphane in the organic phase.
[Ir(μ-Cl)(COD)] 2与含有对-,间-或邻-(1 H,1 H-全氟烷氧基)取代的氟膦P(C 6 H 4 -ORf)3(Rf = CH 2 C 7 F 15,CH 2 CH 2 CH 2 C 8 F 17)和CO(1 atm)给出相应的反式[[Ir(μ-Cl)(CO)P( C 6 H 4 ORf)3 }2 ]。红外ν CO这些络合物的值给出对磷烷的供体/受体性质的一些信息。这些三苯基膦的氟衍生物以及在3,5-位带有两个(1 H,1 H-全氟烷氧基)链的膦与[Rh(μ-Cl)(COD)] 2或[ Rh(COD)2 ] PF 6在室温下在1 bar氢气下于两相系统D-100 /乙醇中还原肉桂酸甲酯,2-环己烯-1-酮,肉桂醛和α-乙酰氨基多辛酸甲酯。在肉桂酸甲酯的还原中观察到一些催化活性的差异,最活跃的催化剂是含有膦与对氟马尾辫的铑配合物。氟催化剂的再循环是可能的,特别是使用对位取