Heterogenization of Shibasaki's binol/la catalyst for enantioselective epoxidation of α,β-unsaturated ketones with multitopic binol ligands:: The impact of bridging spacers

(Figure Presented) Bridging the gap: Heterogenized Shibasaki's binol/La catalyst is synthesized by a self-supporting strategy through the reactions of multitopic ligands with La(OiPr)3 (see picture). The catalyst shows high activity and enantioselectivity, and can be reused in the asymmetric epoxidation of α,β-unsaturated ketones. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA.