An efficient synthesis of alkynyl selenides and tellurides from terminal acetylenes and diorganyl diselenides or ditellurides catalyzed by recyclable copper oxide nanopowder
作者:Marcelo Godoi、Eduardo W. Ricardo、Tiago E. Frizon、Manuela S.T. Rocha、Devender Singh、Márcio W. Paixão、Antonio Luiz Braga
DOI:10.1016/j.tet.2012.08.086
日期:2012.12
Herein, we report an efficient method for the synthesis of alkynyl selenides and tellurides from terminal alkynes and diorganyl diselenides or ditellurides using CuO nanopowder as a recyclable catalyst. This new methodology furnished the desired products in good to excellent yields. Furthermore, the catalyst was easily recovered and reused for further catalytic reactions without loss of activity.
Magnetite (Fe3O4) nanoparticles: an efficient and recoverable catalyst for the synthesis of alkynyl chalcogenides (selenides and tellurides) from terminal acetylenes and diorganyl dichalcogenides
作者:Marcelo Godoi、Daiane G. Liz、Eduardo W. Ricardo、Manuela S.T. Rocha、Juliano B. Azeredo、Antonio L. Braga
DOI:10.1016/j.tet.2013.09.095
日期:2014.5
We present herein a new and efficient methodology for the synthesis of alkynyl chalcogenides from terminal acetylenes and diorganyl dichalcogenides, catalyzed by Fe3O4 nanoparticles. This new approach provided the desired products in good to excellent yields. Moreover, the catalyst was easily recoverable using an external magnet and reused for further experiments without loss of catalytic activity. (C) 2013 Elsevier Ltd. All rights reserved.
Palladium(II) chloride catalyzed carbonylation of organic tellurides with carbon monoxide
In the presence of a catalytic amount of cesium hydroxide under an air atmosphere, the reaction of diarylditellurides (1.0mmol) with terminal alkynes (2.2mmol) at room temperature exclusively give alkynyl tellurides in good yields.