protected 1-OH and 1-SH glycoses in the glucose, glucosamine, galactose, mannose, and lactose series react with nitrobenzenes activated by one or two electron withdrawing substituents like nitro and cyano to afford the corresponding aryl glycosides in 50-100% yield. The S(N)Ar displacement of nitrite by 1-OH glycoses is reversible and gives predominantly the alpha-glycosides, whereas 1-SH glycoses do not
葡萄糖,
葡糖胺,半
乳糖,
甘露糖和
乳糖系列中的苄基,苯甲酰基和乙酰基保护的1-OH和1-SH糖基与由一个或两个吸电子取代基(如硝基和
氰基)活化的
硝基苯反应,得到相应的芳基糖苷50-100%的产率。1-OH糖苷对
亚硝酸盐的S(N)Ar置换是可逆的,并且主要产生α-糖苷,而1-SH糖苷则不会发生异化作用而提供β-糖苷。因此,制备的二
氰基苯基糖苷是用于通过模板合成制备
酞菁-糖缀合物的有用的结构单元。