Abstract
Lithiated 1,3-diene–iron complexes undergo a CO insertion in the presence of trimethyl phosphite via a ferrate intermediate to give 3-formyl or 3-acetyl-1,3-diene-Fe(CO)2P(OMe)3 complexes. Formylation proceeds when the reaction is quenched by a strong Bronsted acid, whereas the ketone is obtained after the treatment with iodomethane.
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