Fluorine-containing β,β-disubstituted trimethylsilyl vinyl ethers: synthesis and reactions with N-(1,1,2,2-tetrafluoroethyl)dimethylamine

Abstract

Fluorine-containing β,β-disubstituted trimethylsilyl vinyl ethers prepared by hydrosilyla-tion of appropriate substituted trifluoromethylketenes react with N-(1,1,2,2-tetrafluoro-ethyl)dimethylamine to give β,β,β’,β’-tetrasubstituted divinyl ethers. Conditions for selective hydrofluorination of tert-butyl perfluoro-2-methylpent-2-enoate into the corresponding saturated ester were developed. Pyrolysis of the latter with P2O5 afforded perfluoromethyl-(propyl)ketene.