(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 re duction of an appropriate fluoroalkene in the presence of chlorotrimet hylsilane (TmsCl) in an undivided cell using a sacrificial anode. Whil e the vinylsilanes 3 (R = F and Cl) were produced in good yield from t rifluorobromoethene and 1,2-difluoro-1,2-dichloroethene, respectively, the production of 3 (R = CF3) from hexafluoropropene was only achieve d in low yield. Voltammetry data are presented. (C) 1997 Elsevier Scie nce Ltd. All rights reserved.