Le rearrangement de claisen en series siliciee et germaniee: silaethylene et germaethylene |
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Authors: | G Bertrand P Mazerolles J Ancelle |
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Institution: | Laboratoire des Organométalliques, Université Paul Sabatier, 118, route de Narbonne, 31062 Toulouse Cédex, France |
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Abstract: | Thermolysis of silicon and germanium isologues of allyl aryl ethers via transient metal π-bonded intermediates leads to aromatic Claisen-type rearrangement. Para-Claisen type reaction is not observed when the aromatic ring is ortho-disubstituted. In that case the Cope rearrangement is replaced by a radical process. The Claisen rearrangement leads to new oxametallacylohexanes by intramolecular trapping of the metal-carbon double-bond, when the homolytic process gives rise to new oxametallacycloheptanes. |
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