Sucrose phosphorylase catalysed glycosylation of glyceric acid amide with complete regio- and diastereo-selectivity is studied. (R)-2-O-α-D-Glucopyranosyl glyceric acid amide was obtained in high yield from single-step transformation of racemic glyceric acid amide and sucrose. Non-productive binding of (S)-glyceric acid amide appeared to underlie strict enantiodiscrimination by the enzyme, thus supporting chiral resolutions based on stereoselective transglycosylation.
研究了
蔗糖磷酸化酶催化
甘油酰胺的糖基化,具有完全的区域选择性和非对映选择性。 (R)-2-O-α-
D-吡喃葡萄糖基
甘油酰胺是通过外消旋
甘油酰胺和
蔗糖的一步转化得到的,高产率。 (S)-
甘油酰胺的非生产性结合似乎是酶严格对映体歧视的基础,因此支持基于立体选择性转糖基化的手性拆分。