842977-99-5Relevant articles and documents
Siloxane-supported organometallic compounds and their catalytic activities for the hydrosilylation of vinylsilanes and dienes
Amako, Masaaki,Schinkel, Jonathan,Freiburger, Lee,Brook, Michael A.
, p. 74 - 81 (2007/10/03)
Two different classes of silicone-modified ligands were prepared: nitrile derivatives, 4′-[3-(organosilyl)propoxy]-biphenyl-4-carbonitrile R′3SiC3H6OC6H 4C6H4CN 2 (R′3Si- = a: Me 3SiOSiMe2-, b: (Me3SiO)2SiMe-, c: Me3SiO(Me2SiO)3SiMe2-, d: Me 3SiO(Me2SiO)25SiMe2-); and, pyridine derivatives, isonicotinic acid 2-methoxy-4-[3-(organosilyl)propyl]phenyl ester R′3SiC 3H6Ph(OMe)OC(O)C5H4N 6. Compounds 2 and 6 were bound to Pd and Pt using ligand substitution reactions with organometallic precursors to give (R3SiC3H 6OC6H4C6H4CN) 2PdCl2 3, (R3SiC3H 6OC6H4C6H4CN) 2PtCl2 4 and (R3SiC3H 6C6H3(OMe)OC(O)C5H 4N)PtCl2(η2-1-octene) 8. The polydimethylsiloxane (PDMS)-supported Pt and Pd compounds 3d and 4d had excellent solubility in both organic solvents and polysiloxanes. All the Pt compounds exhibited good catalytic activity for hydrosilylation of vinylsilanes. The PDMS-supported Pd compound 3d also was effective catalyst for hydrosilylation of a diene, isoprene, with 1,1,1,3,3-pentamethyldisiloxane MMH to produce the 1,4-adduct Me3SiOSiMe 2CH2CH=CMeCH2-H as a major product.