Towards complete stereochemical control: complementary methods for the synthesis of six diastereoisomeric monosaccharide mimetics
作者:Robert Hodgson、Tahir Majid、Adam Nelson
DOI:10.1039/b202890e
日期:2002.6.7
hoxytetrahydropyrans, generated either by epoxidation with perbenzimidic acid or by cyclisation of the corresponding hydroxy iodides, are described in detail. These methods have enabled stereoselective syntheses of six of a possible eight (ignoring anomers) diastereoisomers of 3,4,5-triacetoxy-2-butyl-6-methoxytetrahydropyran. The power of the general approach lies in the ability to choose at a late
描述了用于合成非对映体单糖模拟物的补充方法,其依赖于2-丁基-6-甲氧基-2,6-二氢吡喃-3-酮的衍生物的官能化。描述了在Upjohn和Donohoe(定向)反应条件下这些衍生物二羟基化的立体化学结果。详细描述了非对映体2-丁基-4,5-环氧--3-羟基-6-甲氧基四氢吡喃的水解,其通过用过苯二甲酸环氧化或通过相应羟基碘的环化而产生。这些方法使3,4,5-三乙酰氧基-2-丁基-6-甲氧基四氢吡喃的可能的八个(忽略异构体)非对映异构体中的六个立体选择性合成成为可能。