Palladium-promoted homocoupling reaction of vinyl- and polyenylsilanes in aqueous conditions has been investigated. The reaction is catalyzed by PdCl(2) in the presence of the re-oxidizing system CuCl(2)/LiCl and occurs at room temperature in aqueous solutions containing nonionic amphiphiles. Symmetrically alpha,omega-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.
Homocoupling reaction of unsaturated silanes in aqueous micelles
Cicco S R;
2010
Abstract
Palladium-promoted homocoupling reaction of vinyl- and polyenylsilanes in aqueous conditions has been investigated. The reaction is catalyzed by PdCl(2) in the presence of the re-oxidizing system CuCl(2)/LiCl and occurs at room temperature in aqueous solutions containing nonionic amphiphiles. Symmetrically alpha,omega-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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