Stereospecific synthesis of (Z)-β-trifluoroacetylvinytellurides; X-ray crystal structure of (Z)-β-trifluoroacetylviny-2-(ethoxycarbonyl)ethyltelluride

Abstract

Vinyltellurides 1 react with trifluoroacetic anhydride (TFAA) under heating in the presence of N,N,N,N-tetramethylethylenediamine (tmeda) in THF to give stereospecific (Z)-β-trifluoroacetylvinyltellurides 2, in good yileds (50–84%); the X-ray crystal structure of (Z)-β-trifluoroacetylviny-2-(ethoxycarbonyl)ethyltelluride 2c Shows that an interamolecular coordination bond O→Te exists.