Sodium Acetate → (Acetoxymethyl)dimethoxymethylsilane

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The top, Hydroseal phase and the middle, catalyst phase from Example 5b were admixed with 180 g (2.2 mol) of sodium acetate and the suspension was dried by distilling 10 mL of Hydroseal G 400 H off through a Vigreux column (80 cm) at 1-2 mbar (head), 120-135° C. (head), 150-160° C. (pot). The suspension was cooled down to 130° C., at which point 308 g (2.00 mol) of (chloromethyl)dimethoxymethylsilane were metered in over 47 minutes. The product was distilled out through a Vigreux column (80 cm); the product (acetoxymethyl)dimethoxymethylsilane was obtained at 30 mbar (head), 71-73° C. (head) and 73-80° C. (pot) in the distillate (334 g, 1.87 mol, 94% of theory; purity 99.1% (GC area %)) as a colorless liquid. The solvent, sodium chloride, excess sodium acetate and the phase transfer catalyst in the form of the chloride, bromide and acetate salt of tetrabutylphosphonium remained in the residue.

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