Stereocontrolled routes to cis-hydroxyamino sugars, part VII: synthesis of daunosamine and ristosamine
作者:Henry W. Pauls、Bert Fraser-Reid
DOI:10.1016/0008-6215(86)80009-x
日期:1986.8
The nitrogen of an allylic amine can serve as the fulcrum for stereocontrolled delivery of oxygen to an adjacent trigonal site, and cis-hydroxyamino sugars can thus be prepared. Methods for achieving the complementary procedure, namely, control of the delivery of nitrogen to an adjacent site by an allylic oxygen, are described. For example, treatment of methyl 2,3,6-trideoxy-alpha-L-erythro-hex-2-enopyranoside
烯丙基胺的氮可以用作支点,用于将氧立体控制地递送至相邻的三角位点,因此可以制备顺式-羟基氨基糖。描述了用于实现互补过程的方法,即,通过烯丙基氧控制氮向相邻部位的递送的控制。例如,用三氯乙腈处理甲基2,3,6-三甲氧基-α-L-赤-己基-2-烯吡喃糖苷得到亚氨酸酯,该亚氨酸酯与高氯酸二可合碘鎓反应,得到2-三氯甲基-(甲基2,3,4 ,6-四脱氧-2-碘-α-L-altropyranosido)-[3,4-d] -2-恶唑系。该产物的彻底还原性脱卤,然后水解,得到甲基N-乙酰基-α-L-豆蔻酰胺。使用一系列类似的反应来制备相应的柔红酰胺。