Synthese, Kristallstruktur und Reaktionen neuartiger metallacyclischer Dioxo‐ und Aminooxocarben‐Komplexe des Eisens
- 1 April 1994
- journal article
- research article
- Published by Wiley in European Journal of Inorganic Chemistry
- Vol. 127 (4) , 711-715
- https://doi.org/10.1002/cber.19941270421
Abstract
Synthesis, Crystal Structure, and Reactions of Novel Metallacyclic Dioxo‐ and Aminooxocarbene Complexes of IronThe novel cationic iron carbene complexes 9 and 11 are readily prepared from the corresponding ferra lactones 7 and lactams 10, respectively. With nucleophiles the complexes 9 react chemoselectively either at the methyl group of the methoxy residue or at the terminal allylic C atom. In contrast to similar tungsten complexes 6, compounds 9 show “carbene activity” only when olefin and carbene ligands are separated by two atoms. Novel tricarboryl(2H‐pyran)iron complexes 18 are obtained by a regioselective intramolecular carbene transfer in 9 once switched to the active form 17 by deprotonation using silyl enol ether 16 as a base.Keywords
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