Ferrocenyl-derived electrophilic phosphonium cations (EPCs) as Lewis acid catalysts
作者:Ian Mallov、Douglas W. Stephan
DOI:10.1039/c6dt00105j
日期:——
Oxidation of diphenylphosphinoferrocene and 1,1′-bis(diphenylphosphino)ferrocene with XeF2, resulted in the formation of CpFe(η5-C5H4PF2Ph2) 1 and Fe(η5-C5H4PF2Ph2)22 respectively. Subsequent reactions with [SiEt3][B(C6F5)4] yielded [CpFe(η5-C5H4PFPh2)][B(C6F5)4] 3 and [Fe(η5-C5H4PFPh2)2] [B(C6F5)4]24. PhP(η5-C5H4)2Fe 5 was prepared, converted to [PhMeP(η5-C5H4)2Fe][O3SCF3] 6 and then to [PhMeP(η5
与氟化氙二苯基膦二和1,1'-双(二苯基膦基)二茂铁的氧化2,导致CpFe的量的形成(η 5 -C 5 H ^ 4 PF 2博士2)1和Fe(η 5 -C 5 H ^ 4 PF 2 Ph 2)2 2分别。与[SIET后续反应3 ] [B(C 6 ˚F 5)4〕得到〔CpFe的量(η 5 -C 5 H ^ 4 PFPh 2)] [B(C 6 ˚F5) 4 ] 3和的[Fe(η 5 -C 5 H ^ 4 PFPh 2) 2 ] [B(C 6 ˚F 5) 4 ] 2 4。PHP(η 5 -C 5 H ^ 4) 2的Fe 5制备,转化为[PhMeP(η 5 -C 5 H ^ 4) 2的Fe] [0 3 SCF 3 ] 6,然后到[PhMeP(η 5 -C 5高4)2 Fe] [B(C 6 F 5)4 ] 7。的盐的能力3,4和7来催化1,1-二苯基乙烯的弗里德尔-克拉夫茨二聚化,dehydroco