Palladium-promoted homocoupling reaction of vinyl- and polyenylsilanes in aqueous conditions has been investigated. The reaction is catalyzed by PdCl2 in the presence of the re- oxidizing system CuCl2/LiCl and occurs at room temperature in aqueous solutions containing nonionic amphiphiles. Sym- metrically α,ω-disubstituted stereodefined all-trans polyenes have been obtained in mild conditions and in good yields (65–87 %), higher than those previously reported for the same reactions carried out in methanol or HMPA. A comparison between two commercially available surfactants, Triton X- 100 and PTS, has been performed.
Pd-Promoted Homocoupling Reactions of Unsaturated Silanes in Aqueous Micelles
TIECCO MUltimo
2010-01-01
Abstract
Palladium-promoted homocoupling reaction of vinyl- and polyenylsilanes in aqueous conditions has been investigated. The reaction is catalyzed by PdCl2 in the presence of the re- oxidizing system CuCl2/LiCl and occurs at room temperature in aqueous solutions containing nonionic amphiphiles. Sym- metrically α,ω-disubstituted stereodefined all-trans polyenes have been obtained in mild conditions and in good yields (65–87 %), higher than those previously reported for the same reactions carried out in methanol or HMPA. A comparison between two commercially available surfactants, Triton X- 100 and PTS, has been performed.File in questo prodotto:
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