Intramolecular metathesis of various diallylic compounds containing the O, S, Si or P hetero-elements was achieved in good yields by using the cyclometallated carbene complex W(OAr)(OAr)(CHCMe3)Cl(OEt2). Unsubstituted diallyl ether is converted into 2,5-dihydrofuran; diallyl sulfide is converted into 2,5-dihydrothiophen; diallylphenyl phosphine is converted into 1-phenyl-2,5-dihydro-1H-phosphole; and diallyldimethyl- or diphenylsilanes are converted into the corresponding silacyclopentenes. The metathesis reaction of methyl-substituted diallyl sulfides shows that steric effects are very important. Depending on the position of the methyl groups, the reaction can proceed normally or be completely inhibited.
|Original language||English (US)|
|Number of pages||3|
|Journal||Bulletin de la Societe Chimique de France|
|State||Published - 1995|
- steric hindrance
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