(Fluorovinyl)trimethylsilanes from the electrochemical silylation of fluoroalkenes in the presence of chlorotrimethylsilane

The synthesis of the 2-substituted (1,2-difluorovinyl)trimethylsilanes 3 (R = F, Cl and CF3) has been investigated by the electrochemical reduction of an appropriate fluoroalkene in the presence of chlorotrimethylsilane (TmsCl) in an undivided cell using a sacrificial anode. While the vinylsilanes 3 (R = F and Cl) were produced in good yield from trifluorobromoethene and 1,2-difluoro-1,2-dichloroethene, respectively, the production of 3 (R = CF3) from hexafluoropropene was only achieved in low yield. Voltammetry data are presented. (C) 1997 Elsevier Science Ltd. All rights reserved.