Synthesis, Characterization, and Catalytic Properties of Polysiloxanes withPendant 4-(3-Pyridinyl)butyl and 4-(1-Oxypyridin-3-yl)butyl Groups

摘要

Pyridine 1-oxide and vinyl polymers bearing this moiety are extremely selectivenucleophilic catalysts in acyl transfer reactions involving carboxylic and phosphoric acid derivatives. Polysiloxanes are organometallic macromolecules well-known for their useful physical and dynamic mechanical properties (i.e., chain flexibility, low-temperature elasticity, hydrophobicity, and thermooxidative stability) and differ considerably from vinyl polymers. We have been interested in combining the desirable properties of the siloxane chain with the effective and selective catalytic properties of pyridines. Recently we have reported the synthesis and characterization of silane monomers, siloxane oligomers, and polysiloxanes with 1-oxypyridin-3-yl groups directly bonded to silicon.