Organic Letters, vol.27, no.12, pp.3083-3088, 2025 (SCI-Expanded)
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).