Ammonia → 3-Butenyltrimethoxysilane

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Reaction Steps

23 g sodium (1 mole) are placed in a 500 ml flask and approximately 150 ml ammonia condensed in at -70 ° C. 123.6 g 3,4-dichlorobutyl trimethoxysilane (0.5 mole) is added dropwise to the deep-blue solution produced in the course of 1 hour at -55° C. while the reaction mixture visibly changes color. The ammonia is allowed to evaporate overnight from the colorless, highly viscous suspension produced, the colorless residue combined with 150 ml n-pentane, the NaCl (56.9 g ≅97.5 % of theory) removed by filtration and 88.2 of a colorless liquid corresponding to the expected amount is obtained after the solvent is drawn off. 75.7 g =85.9 % of theory of pure 3-butenyl trimethoxysilane are obtained therefrom by distillation (cf. table 1).

Provenance & Evidence