Synthesis of silacycloalkenes and silaspirenes by Ru (II)-catalyzed ring-closing metathesis reactions

I Ahmad, ML Falck-Pedersen, K Undheim

Index: Ahmad, Iftikhar; Falck-Pedersen, Mette Lene; Undheim, Kjell Journal of Organometallic Chemistry, 2001 , vol. 625, # 2 p. 160 - 172

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Abstract

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