Copper nano-catalyst: sustainable phenyl-selenylation of aryl iodides and vinyl bromides in water under ligand free conditions
作者:Amit Saha、Debasree Saha、Brindaban C. Ranu
DOI:10.1039/b819137a
日期:——
A simple and efficient procedure for the synthesis of aryl- and vinyl-selenides has been developed by a copper nanoparticle catalysed reaction of aryl iodide/vinyl bromide with diphenyl diselenide in the presence of zinc in water. (E)-Vinyl bromides produce (E)-vinyl selenides stereoselectively, whereas (Z)-vinyl bromides provide mixtures of (E) and (Z) isomers. The catalyst was recycled.
Glycerol as a promoting medium for cross-coupling reactions of diaryl diselenides with vinyl bromides
作者:Loren C. Gonçalves、Gabriela F. Fiss、Gelson Perin、Diego Alves、Raquel G. Jacob、Eder J. Lenardão
DOI:10.1016/j.tetlet.2010.10.107
日期:2010.12
herein the use of glycerol as a novel solvent in the cross-coupling reaction of diaryl diselenides with vinyl bromides catalyzed by CuI. This cross-coupling reaction was performed with diaryl diselenides and (Z)- or (E)-vinyl bromides bearing electron-withdrawing and electron-donating groups, affording the corresponding vinyl selenides in good to excellent yields. The mixture glycerol/catalyst can be
DES as a green solvent to prepare 1,2-bis-organylseleno alkenes. Scope and limitations
作者:Eric F. Lopes、Lóren C. Gonçalves、Julio C.G. Vinueza、Raquel G. Jacob、Gelson Perin、Claudio Santi、Eder J. Lenardão
DOI:10.1016/j.tetlet.2015.10.095
日期:2015.12
We describe here our results on the use of choline chloride/urea 1:2 as a deep eutectic solvent (DES) in the synthesis of vinyl selenides. A good selectivity for the (E)-1,2-bis-organylseleno alkenes was observed starting from terminal alkynes and diaryl or dibutyl diselenides in the presence of NaBH4. The reaction of 1,3-butadiynes with diphenyl diselenide afforded exclusively the respective mono-selenylated (Z)-alkenynes. Diphenyl ditelluride reacted with phenylacetylene and 1,4-diphenyl-but-1-en-3-yne affording (Z)-phenyltelluro alkenes in good yields. (C) 2015 Elsevier Ltd. All rights reserved.
STEFANI, HELIO ALEXANDRE;MARCUZO, DO CANTO CAVALHEIRO MARILENE;VALDIR, CO+, AN. ACAD. BRAS. CIENC., 61,(1989) N, C. 37-47
作者:STEFANI, HELIO ALEXANDRE、MARCUZO, DO CANTO CAVALHEIRO MARILENE、VALDIR, CO+