Journal of Organometallic Chemistry
Journal of Organometallic Chemistry
5 years ago

Preparation of polydimethylsiloxane with amino end group via Pd-catalyzed dehydrogenative coupling of terminal hydrosilyl unit and amine

Preparation of polydimethylsiloxane with amino end group via Pd-catalyzed dehydrogenative coupling of terminal hydrosilyl unit and amine
Ring-opening polymerization of hexamethylcyclotrisiloxane (D3) with organolithium reagents (R1Li) followed by quenching of the resulting anions with chlorodimethylsilane yielded the corresponding polysiloxanes with R1 and SiMe2H groups at each end. The hydrosilyl end groups readily underwent palladium-catalyzed dehydrogenative amination reactions with secondary amines (R2 2NH) to produce polysiloxanes with amino end groups, R1(SiMe2O) n SiMe2NR2 2. The aminopolysiloxanes were applied as hydrophobic modifiers of glass surface and treatment of glass plates with THF solutions of the aminopolysiloxanes increased the water contact angles of the glass surface from 5° to 22°–65°, depending on the aminopolysiloxane structures and the reaction conditions.

Publisher URL: www.sciencedirect.com/science

DOI: S0022328X18300743

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