Intermolecular hydrogen-bonding pattern of a glycosyl donor: The key to understanding the outcome of sialylation

Changes in the hydrogen-bonding pattern in solutions of glycosyl donor induced by the addition of external amides/imides or by concentration changes influence the yield and stereoselectivity of sialylation. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).