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

Journal of the Brazilian Chemical Society

Hélio A. Stefani²  Jesus M. Pena²  Julio Zukerman-schpector¹  Edward R. T. Tiekink¹ 

[1] ,Universidade de São Paulo Faculdade de Ciências Farmacêuticas São Paulo SP ,Brazil

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

DOI  :  10.1590/S0103-50532011000800006

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】

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