Asymmetric epoxidation of alkenes catalysed by a ‘basket-handle’ iron–porphyrin bearing amino acids

Abstract
A ‘basket-handle’ iron-porphyrin bearing L-phenylalanine residues has been prepared and found to catalyse the epoxidation of p-chlorostyrene with a 50% excess of the (R)-epoxide, whereas ‘picket’ iron-porphyrins bearing the same amino acid have led to a 10–20% excess of the (S)-epoxide.

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