Synthesis of 1,3-diynes via detelluration of bis(ethynyl)tellurides

Journal of the Brazilian Chemical Society

Universidade Federal de São Carlos, São Carlos, Brazil¹  Zukerman-Schpector, Julio¹  Stefani, Hélio A.¹  Tiekink, Edward R. T.¹  Universidade de São Paulo, São Paulo, Brazil¹  University of Malaya, Kuala Lumpur, Malaysia¹  Pena, Jesus M.¹ 

关键词: tellurium;    bis(phenylethynyl)tellurides;    bis(alkynylethynyl)tellurides;    detelluration;    diynes;    palladium;   

DOI  :  10.1590/S0103-50532011000800006

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The synthesis of symmetric conjugated diyne systems with electron-withdrawing or electron-donating substituents via a palladium-catalyzed detelluration of bis(arylethynyl)tellurides and bis(alkylethynyl)tellurides is described. This procedure is effected under atmospheric conditions in DMF using Pd(OAc)2 as a catalyst and AgOAc as an additive in the presence of triethylamine. This route offers efficient access to conjugated diyne systems in short reaction time. X-ray crystallographic structure and solid-state conformation of bis(p-tolylethynyl)telluride show a supramolecular chain aligned along the b axis, sustained by C-H...π interactions.

【 授权许可】

Unknown