Triethylamine → N,N,N-Triethyl-3-(trimethoxysilyl)propan-1-aminium chloride

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Reaction Steps

3.0 g of triethylamine and 18 g of ethyl acetate were charged into a 100 mL flask to be dissolved. While stirring the resultant mixed solution with a magnetic stirrer, to the mixed solution, a solution in which 8.8 g of trimethoxysilylpropyl chloride was dissolved in 24 g of ethyl acetate was gradually added at room temperature in a nitrogen atmosphere. The reaction mixture was refluxed over 3 days and therefrom, ethyl acetate was distilled off under reduced pressure. The resultant concentrate was dropped into 100 mL of diethyl ether and therefrom, triethylamine and trimethoxysilylpropyl chloride as by-products were removed. This purification was repeated three times and then remaining diethyl ether was distilled off under reduced pressure, followed by dissolving the resultant concentrate in methanol to obtain a 30% methanol solution of trimethoxysilylpropyltriethylammonium chloride.

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