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Preformed π-Allyl Iron Complexes as Potent, Well-Defined Catalysts for the Allylic Substitution

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  • We are grateful to the Deutsche Forschungsgemeinschaft, the Fonds der Chemischen Industrie, the Studienstiftung des Deutschen Volkes (PhD grant for A.D.), the Dr.-Otto-Röhm-Gedächtnisstiftung, and the Higher Education Commission of Pakistan (grant for M.T.) for generous financial support.

Abstract

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Reanimation: Catalytically inactive π-allyl iron complexes are “reanimated” upon addition of N-heterocyclic carbene ligands such as 1,3-dimesitylimidazolin-2-ylidene (SIMES). A comparison of stoichiometric and catalytic allylic alkylation reactions shows the π-allyl mechanism to be active in this catalytic system.

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