Competing C−F Activation Pathways in the Reaction of Pt(0) with Fluoropyridines: Phosphine-Assistance versus Oxidative Addition
作者:Ainara Nova、Stefan Erhardt、Naseralla A. Jasim、Robin N. Perutz、Stuart A. Macgregor、John E. McGrady、Adrian C. Whitwood
DOI:10.1021/ja8046238
日期:2008.11.19
pentafluoropyridine by the model zero-valent bis-phosphine complex, [Pt(PH3)(PH2Me)], reveals three quite distinct pathways leading to square-planar Pt(II) products. Direct oxidativeaddition leads to cis-[Pt(F)(4-C5NF4)(PH3)(PH2Me)] via a conventional 3-center transition state. This process competes with two different phosphine-assisted mechanisms in which C-F activation involves fluorine transfer to a phosphorus