Abstract 2,6-Anhydro-1-deoxy-1-nitroalditols were prepared in good yields by known procedures via addition of nitromethane to d -glucose, d -mannose, d -galactose, d -xylose, d -lyxose and l -arabinose, followed by a cyclization step in boiling water. In the case of d -ribose, a mixture of pyranoid and furanoid anhydroalditols was isolated by different methods in relatively poor yields, at variance
摘要通过将
硝基甲烷添加到d-
葡萄糖,d-
甘露糖,d-半
乳糖,d-
木糖,d-lyxose和l-
阿拉伯糖中的已知方法,以高收率制备了2,6-脱
水-1-脱氧-1-硝基醛糖醇,然后在沸
水中进行环化步骤。就d-
核糖而言,通过其他方法以相对较差的收率分离出
吡喃类化合物和
呋喃类脱
水醛糖醇的混合物,这与其他作者最近的报道有所不同。从其
乙酸盐的1 Hn.mr光谱建立产物的立体
化学关系,可以进一步了解环化步骤的非对映选择性。