Acetic Acid → HCID 18468823, compound

Participants

Reaction Conditions

Reaction Steps

A siloxane according to the present invention was prepared by charging a flask with 55.8 g (0.3 mole) of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane under a nitrogen atmosphere. A platinum/vinylsiloxane catalyst, prepared according to the method described by Hitchcock et al.(Angew. Chem. Int. Ed. Engl., 30, 1991) was added at a level of 10−6 equivalent of platinum. Acetic acid (0.06 g; 0.001 mol) was introduced and the reaction mixture heated to 60° C. Trimethoxysilane (12.2 g; 0.1 mol) and 0.24 g (0.004 mol) acetic acid were added to an addition funnel and this mixture was slowly added to the flask while the temperature was maintained below 70° C. Subsequently, the reaction mixture was kept at 70° C. for 1 hr. The product was isolated by fractional distillation at 80° C./8 mm Hg to obtain a mixture (confirmed by NMR) of 7% of an α-adduct (1-vinyl-3-(1-trimethoxysilylethyl)-1,1,3,3-tetramethyldisiloxane) having the structure

Provenance & Evidence