Si-disubstituted diallylsilanes in homolytic thiylation and electrophilic fragmentation reactions
作者:E. N. Suslova、A. I. Albanov、B. A. Shainyan
DOI:10.1134/s1070363208090065
日期:2008.9
Approaches to Si-disubstituted 1-thia-5-silacyclooctanes based on homolytic addition of hydrogen sulfide to diallylsilanes R2Si(CH2CH=CH2)(2) and on intramolecular cyclization of Si-disubstituted (allyl)(gamma-sulfanylpropyl)silanes have been studied. In the former case the reactivity of the silanes decreases in the order R = MeO > F > Me > Ph, whereas in the latter case the reactivity order is slightly different: Me > MeO approximate to F >> Ph. The reactions of diphenyl-and dimethyldiallylsilanes with the complex BF3 center dot 2AcOH occur in a different manner: The former involves rearrangement to form fluoro(2-methylpent-4-enyl)diphenylsilane, while the latter, elimination of the two allyl groups to fluorodimethylsilane and propene.