Phenylethenyl-substituted silicones via Heck coupling reaction |
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| Authors: | Anna Czech Tomasz Ganicz Ma&#x;gorzata Noskowska W&#x;odzimierz A Sta&#x;czyk Anna Szel&#x;g |
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| Institution: | aGE Silicones, 771 Old Sawmill River Road, Tarrytown, New York 10591, USA;bCentre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland;cHollister, Poleczki 47, 02-822 Warszawa, Poland |
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| Abstract: | Systematic studies of several palladium complexes (Pd(OAc)2, PdCl2(cod)], Pd2(dba)3], Pd(PPh3)4], PdCl(SnCl3)(P{p-Tol}3)2], Pd2Cl2(SnCl3)2(P{p-Tol}3)2]) as potential catalytic systems for arylation of vinylsiloxanes via Heck coupling reactions are described. Catalytic activity and selectivity were studied for a model reaction of trimethylvinylsilane with PhBr and m-ClC6H6Br and then the most effective systems were applied for functionalisation of tetramethyltetravinylcyclotetrasiloxane and poly(dimethylsiloxane-co-methylvinylsiloxane), leading to the silicone fluids having high refractive index (1.5–1.6). |
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| Keywords: | Heck reaction Palladium catalysts High refractive fluids Arylated polysiloxanes |
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