CO[SiH](OC)OC.[C:8]([O:13][CH2:14][CH2:15][CH2:16][Si](OC)(OC)OC)(=[O:12])[C:9]([CH3:11])=[CH2:10]>C1(C)C=CC=CC=1.C(Cl)C=C.[Pt]>[C:8]([O:13][CH2:14][CH:15]=[CH2:16])(=[O:12])[C:9]([CH3:11])=[CH2:10]A three-neck flask equipped with a reflux condenser, stirring rod and thermometer was charged with 50ml of toluene as a solvent, a small amount of polymerization inhibitor, 12.6 grams of allyl methacrylate ester (0.1 mole) and one cubic centimeter of Catalyst A of Example 1 as a catalyst (10-5 mole on a platinum basis). 13.4 grams of trimethoxy silane (0.11 mole) were dropwise added in one hour from a dropping funnel. The reaction temperature was maintained at about 50° C. The reaction was further carried out for 30 minutes. The gas chromatography analysis demonstrated that gamma-methacryloxypropyl trimethoxy silane was obtained in a yield of 86% on an allyl methacrylate basis.
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