synthesized by N-iodosuccinimide-silver triflate-promoted condensation using 11 and 15 as the glycosyl acceptors and ethyl 1-thio-β-d-xylopyranoside triacetate 16, 36, and 37 as the glycosyl donors. Also described are an improved preparation of 4 and 5, and the synthesis of 1-naphthyl β-d-xylopyranoside, as well as an alternative approach to the 2- and 4-nitrophenyl β-xylobiosides.
通过二丁基氧化
锡介导的酰化作用,将2-和4-
硝基苯基β-d-
吡喃
吡喃糖苷(4和5)转化为相应的2,3-二-O-苯甲酰基衍
生物11和15。
炭柱色谱法,由市售材料制成,并转化为二糖和三糖甲基1-
硫代-β-糖苷36和37。β-(1→4)-d-的2-和4-
硝基苯基β-糖苷dp 2–4的
木糖寡糖是通过N-
碘代琥珀
酰亚胺-
三氟甲磺酸银促进的缩合反应合成的,使用11和15作为糖基受体,乙基1-
硫代-β-d-
吡喃
吡喃糖苷
三乙酸酯16、36和37作为糖基供体。 。还描述了改进的4和5的制备方法以及1-
萘β-d-
吡喃
吡喃糖苷的合成,以及2-和4-
硝基苯基β-
吡喃二糖苷的替代方法。