Published January 1, 2025
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Iron Porphyrins and Iron Salens as Highly Enantioselective Catalysts for the Ring-Expansion Reaction of Epoxides to Tetrahydrofurans
- 1. Middle East Tech Univ, Dept Chem, TR-06531 Ankara, Turkiye
- 2. Suleyman Demirel Univ, Dept Chem, TR-32260 Isparta, Turkiye
Description
Iron porphyrins have been found to be efficient catalysts for the ring-expansion reaction of epoxides with alkenes to give the corresponding tetrahydrofurans; very low loadings (down to 1 mol %) are sufficient to achieve high yields (up to 98%). Additionally, an iron(III) salen complex based on the axially chiral 1,1-binaphthalene backbone has been shown to catalyze the reaction with high enantioselectivity (e.g., 92% ee for calyxolane A).
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