A novel convergent chemoselective glycosylation methodology based on differences in reactivity between hydroxyl groups of a glycosyl donor and an acceptor was established. A series of di- and trisaccharides were synthesized in good to excellent yields which can be employed as acceptors in a subsequent glycosylation without the need to perform protecting group interconversions. The effectiveness of this methodology has been demonstrated in a highly convergent one-pot multi-step glycosylation yielding 1-4 and 1-6 linked tetra- and hexasaccharide.
根据糖基供体和受体羟基之间反应性的差异,建立了一种新的聚合
化学选择糖基化方法。该方法合成了一系列二糖和三糖,产量从良好到极佳,在随后的糖基化过程中可用作受体,而无需进行保护基相互转化。这种方法的有效性已在高度收敛的单锅多步糖基化过程中得到证实,并产生了 1-4 和 1-6 连接的四糖和六糖。