(S)-2-Hydroxy-4-[(3R,4S,5S,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-(2Z)-ylidene]-butyric acid methyl ester 在
platinum on activated charcoal
氢气 作用下,
以
甲醇 为溶剂,
反应 5.0h,
以91%的产率得到methyl (2S)-2-hydroxy-4-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyl)-butanoate