Palladium-catalyzed Sonogashira cross-coupling of organic tellurides with alkynes
摘要:
Alkyl aryl tellurides and a tellurol ester were used as coupling partners in Pd(0)-catalyzed Sonogashira reactions. Microwave-assisted reactions of alkyl aryl tellurides with alkynes in the presence of Cut and catalytic amounts of Pd(PPh(3))(4) produced alkynyl arenes. Similarly, a tellurol ester on reaction with alkynes afforded alkynyl phenyl ketones in the presence of Cut and a catalytic amount of Pd(PPh(3))(4) at room temperature. (C) 2011 Elsevier Ltd. All rights reserved.
A general procedure for the synthesis of methylthio-, methylseleno- and methyltelluro-substituted aromatic compounds
作者:Lars Engman、Jonas S.E. Hellberg
DOI:10.1016/0022-328x(85)80366-1
日期:1985.12
A one-pot procedure is described which allows the facile introduction of one or two methylchalcogeno groups into a variety of monobromo or dibromo aromatics. The bromo compounds were converted to their corresponding lithio derivatives by treatment with t-butyllithium in tetrahydrofuran at −78°C, and these derivatives were then treated, at ambient temperature with elemental sulfur, selenium, or tellurium
Sodium Telluride in<i>N</i>-Methyl-2-pyrrolidone: An Efficient Telluration System for the Synthesis of Aromatic Tellurides and Ditellurides
作者:Hitomi Suzuki、Tohru Nakamura
DOI:10.1055/s-1992-26162
日期:——
Sodium telluride prepared in situ from tellurium and sodium hydride in N-methyl-2-pyrrolidone was found to act as an efficient tellurating agent for nonactivated aromatic iodides, providing a simple route to a variety of diaryl tellurides, alkyl aryl tellurides and diaryl ditellurides.