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Ru(II)-Catalyzed RCM Reactions in the Construction of Silacycloalkenes and Silaspirenes.
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1  Department of Chemistry, University of Oslo, N-0315 Oslo, Norway.

Abstract: Five-, six- and seven-membered silacycloalkenes have been prepared by carbon-carbon bond forming cyclisation of dienyl- and enynylsilanes under RCM conditions. The relative ease of ring formation from dienes was in the order six- >seven- > five-membered rings. A conjugated vinylsilacyclopentene was formed from a corresponding enyne substrate. Silaspirenes have been prepared from silacarbacycles by the same methodology
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