Styrene → Phenethylmethyldiethoxysilane

Beteiligte Stoffe

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Reaktionsschritte

Comparative Example 5. The platinum-catalyzed reaction of styrene and methyldiethoxysilane in the absence of a hydro(acyloxy)silane compound. A 212 mg sample of styrene (2 mmoles) and 279 mg of methyldiethoxysilane (HSi(CH3)(OEt)2, 2.1 mmoles) were placed in a glass reaction tube. This was followed by the addition of 0.001 mL of a toluene solution (platinum content=0.4 wt %) of a zero-valent platinum complex with divinylsiloxane. The reaction tube was subsequently sealed with Teflon™ tape, placed in an oil bath heated to 80° C., and heated for 1 hour. After cooling, analysis of the contents by gas chromatography showed an approximately 65% conversion of the vinyl group in the styrene. The hydrosilylate yield was 63% phenethylmethyldiethoxysilane. The α-phenethyl adduct: β-phenethyl adduct ratio was 1:1.65.

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