isopropyl-2-phenylethynyl telluride was obtained in 86% yield, indicating that an alkanetellurolate is an intermediate in this reaction. Contrary to this result, reduction of divinyl ditellurides with lithium aluminum hydride in tetrahydrofuran or with lithium in liquid ammonia furnished ethenetellurolate anions, which on reaction with alkyl halides afforded vinyl alkyltellurides [C4H9TeCH=CH2, C4H9Te(CH3)C=CH2
Synthetic routes to alkylvinyl tellurides by direct reaction of metallic tellurium, acetylene and alkyl halide in the system KOH-SnCl2-H2O and successive interaction of divinyl telluride with lithium and alkyl halide in liquid ammonia have been developed.
Vinyllithiums from butyl-vinyl tellurides and bis-vinyl tellurides
作者:Simone M. Barros、João V. Comasseto、Jorge Berriel
DOI:10.1016/s0040-4039(00)70695-2
日期:1989.1
Butyl vinyl tellurides and bis-vinyl tellurides furnish vinyllithiums with retention of configuration in good yields upon treatment with n-butyllithium at −78°C.
丁基乙烯基碲化物和双乙烯基碲化物提供乙烯基锂,并在-78°C下用正丁基锂处理时,结构保持高收率。
Stereospecific synthesis of (Z)-β-trifluoroacetylvinytellurides; X-ray crystal structure of (Z)-β-trifluoroacetylviny-2-(ethoxycarbonyl)ethyltelluride
作者:Xue-Sheng Mo、Yao-Zeng Huang、Yu-Rong Zhao
DOI:10.1039/c39940002769
日期:——
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 crystalstructure of (Z)-β-trifluoroacetylviny-2-(ethoxycarbonyl)ethyltelluride 2c Shows that an interamolecular coordination bond O→Te exists.