A chiral cobalt(III) complex of a Schiff base derived from (R)-tryptophan and salicylaldehyde catalysed asymmetric trimethyl-silylcyanation of benzaldehyde at ambient temperature and a 20:1 substrate/catalyst ratio with the formation of enantiomerically enriched mandelonitrile (ee up to 77%).
Asymmetric synthesis of cyanohydrins catalysed by a potassium Δ-bis[N-salicylidene-(R)-tryptophanato]cobaltate complex
Y. N. Belokon, A. G. Bulychev, V. I. Maleev, M. North, I. L. Malfanov and N. S. Ikonnikov, Mendeleev Commun., 2004, 14, 249 DOI: 10.1070/MC2004v014n06ABEH002029
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