- Bis(acetylacetonato)Ni(II)/NaBHEt3-catalyzed hydrosilylation of 1,3-dienes, alkenes and alkynes
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The utility of commercially available Ni(II) salts, Ni(acac)2 (acac = acetylacetonato) (1a) and its derivatives bis(hexafluoroacetylacetonato)nickel(II) (1b) and bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II) (1c) as versatile hydrosilylation catalyst precursors is described. Complexes 1a-c catalyze 1,4-selective hydrosilylation of 1,3-dienes in the presence of NaBHEt3 at ambient temperature. The reactions exhibit good regioselectivity to give the branched isomers as major products. The catalytic system also catalyzes hydrosilylation of alkenes including industriary important siloxy-, amino-, and epoxy-substituted ones as well as both terminal and internal alkynes.
- Srinivas, Venu,Nakajima, Yumiko,Ando, Wataru,Sato, Kazuhiko,Shimada, Shigeru
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- Synthesis of Silicon-Substituted Alkenes via Catalytic Hydrosilylation of Vinylcyclopropanes
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Hydrosilylation of vinylcyclopropanes in the presence of the Wilkinson complex is accompanied mainly by opening of the cyclopropane ring and yields silicon-substituted alkenes. Under the same conditions, 1,1-dicyclopropylethylene gives difficultly accessi
- Bessmertnykh,Blinov,Grishin,Donskaya,Beletskaya
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p. 1620 - 1630
(2007/10/03)
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- C-C bond activation of cyclopropane ring in hydrosilylation catalyzed by Wilkinson complex
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The new synthetic approach to silylated alkenes based on RhCl(PPh3)3 catalyzed hydrosilylation of vinylcyclopropanes is proposed. The mechanism of cyclopropane ring opening is discussed.
- Bessmertnykh, Alla G.,Blinov, Kirill A.,Grishin, Yurii K.,Donskaya, Nadezhda A.,Beletskaya, Irina P.
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p. 7901 - 7904
(2007/10/02)
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