Efficient synthesis of β-(1,6)-linked oligosaccharides through microwave-assisted glycosylation
作者:Lingyao Li、Emily A. Franckowiak、Yi Xu、Evan McClain、Wenjun Du
DOI:10.1002/pola.26771
日期:2013.9.1
oligosaccharides. Di‐functional AB monomers, 2,3,4‐tri‐O‐acetyl‐α‐d‐galactopyranosyl bromide (3a) and 2,3,4‐tri‐O‐acetyl‐α‐d‐glucopyranosyl bromide (3b) were designed and synthesized as weakly reactive monomers to avoid unwanted glycosylation or degradation during preparation and storage. The glycosylations of these monomers gave low conversions and low molecular weight oligosaccharides at rt, reflux, and
为了有效合成寡糖,开发了微波辅助糖基化方法。双官能AB单体2,3,4-三-O-乙酰基-α- d-吡喃半乳糖基溴化物(3a)和2,3,4-三-O-乙酰基-α - d-吡喃葡萄糖基溴化物(3b)为设计和合成为弱反应性单体,以避免在制备和储存过程中发生不必要的糖基化或降解。这些单体的糖基化在室温,回流和低微波能量照射下产生低转化率和低分子量寡糖。但是,当施加高微波能量时,糖基化变得非常有效,可实现100%的转化并产生低聚糖。中号Ñ = 4.76 kDa的用于图3a和中号Ñ = 4.05 kDa的用于图3b。对乙酰化的寡糖进一步进行脱保护以进行结构分析,这表明寡糖主要包含线性β-(1,6)-糖基键。©2013 Wiley Periodicals,Inc. J. Polym。科学,A部分:Polym。化学 2013,51,3693–3699