of specifically protected alditols with (diacetoxyiodo)benzene or iodosylbenzene and iodine is a mild and selective procedure for the synthesis of chiral 6,8-dioxabicyclo[3.2.1]octane and 2,7-dioxabicyclo[2.2.1]heptane ring systems under neutral conditions. This methodology can be useful not only for the preparation of chiral synthons but also for the selective oxidation of specific carbons of the carbohydrate
特殊保护的糖醇与(
二乙酰氧基
碘)苯或
碘基苯和
碘的反应是合成手性
6,8-二氧杂双环[3.2.1]辛烷和2,7-二氧杂
双环[2.2.1]庚烷环的温和选择性步骤系统在中性条件下。该方法不仅可用于手性合成子的制备,而且可用于
碳水化合物骨架的特定碳的选择性氧化,从而构成了合成被保护的
蔗糖的良好方法。该反应可以被认为是通过氧碳鎓离子进行的分子内糖苷化。