Add time:07/19/2019         Source:sciencedirect.com

Various aromatic aldehydes were converted to one-carbon elongate 1,1-bis(silyl)-1-alkene derivatives bearing Si–H functional and reactive groups in a convenient one-pot operation via the Peterson protocol. Then poly(styrene) and poly(α-methylstyrene) (І&II) random homopolymers were synthesized by solution free radical polymerization at 70(±1) °C using α,α′-azobis(isobutyronitrile) (AIBN) as an initiator. The aldehyde group is introduced by direct electrophilic substitution of polymers І and II. This formylation reaction was conducted in two different solvents: dichloromethane (CH2Cl2) and nitrobenzene (PhNO2). The results indicate that PhNO2 appeared to be a more suitable solvent for such an aldehyde functionalization of the polymers. The formylated polymers (ICHO, IICHO) were then converted to Si–H functionalized polymers (ISi–H, IISi–H) via reaction with tris(dimethylsilyl)methyllithium, (HMe2Si)3CLi.

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