Syntheses of the syn and anti α-amino-β-hydroxy acids of vancomycin: (2S, 3R) and (2R, 3R) p-chloro-3-hydroxytyrosines

Article abstract of DOI:10.1016/0040-4039(96)01829-1

Syntheses of (2S, 3R) and (2R, 3R) methyl p-chloro-3-hydroxytyrosinates 2 and 3 respectively, have been achieved from 3-chloro-4-hydroxybenzoic acid. These approaches relied on the asymmetric hydrogenation of highly functionalized carbonyl derivatives using chiral ruthenium complexes.