Reaction of 1, 6-anhydro-2, 2', 3, 4'-tetra-O-benzyl-β-lactose (1, 1 mol eq.) with the acetylated oxazoline of N-acetyllactosamine (2, 5 mol eq.) gave the derivatives of 6'-Nacetyllactosaminyllactose (3, 24.5%) and lacto-N-neohexaose (8, 53.5%). The protecting groups of 3 and 8 were removed by means of the following series of reactions to provide the corresponding tetrasaccharide (7) and hexasaccharide (12), respectively : debenzylation followed by acetylation, acetolysis, and de-O-acetylation. 13C-nuclear magnetic resonance spectral data for the 1, 6-anhydro-β-derivatives of 7 and 12 are presented.
1, 6-脱
水-2, 2', 3, 4'-四-O-苄基-
β-乳糖(1, 1 mol eq.)与乙酰化 N-乙酰
乳糖胺(2, 5 mol eq.)的乙酰化氧杂啉反应,产生了 6'-N-乙酰
乳糖胺
乳糖(3, 24.5%)和
乳糖-N-新己糖(8, 53.5%)的衍
生物。通过以下一系列反应,分别除去 3 和 8 的保护基团,得到相应的四糖(7)和六糖(12):脱苄基化、乙酰化、乙酰化、脱 O-乙酰化。13C-核磁共振光谱数据用于 7 和 12 的 1, 6-脱
水-β-衍
生物。