Excellent enantioselectivities of up to >99% ee have been achieved in the heterogeneous asymmetric aminohydroxylation of trans-cinnamate derivatives using silica gel-supported (QN)2PHAL [SGS-(QN)2PHAL 1]; the dark brown 1·Os complex, recovered by simple filtration after reaction, could be reused without any loss of enantioselectivity.
C. Eui Song, C. Rim Oh, S. Woo Lee, S. Lee, L. Canali and D. C. Sherrington, Chem. Commun., 1998, 2435 DOI: 10.1039/A806959J
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