Reductive elimination of glycosyl phenyl sulfones by SmI2-HMPA: A convenient synthesis of substituted pyranoid glycals
作者:Pierre de Pouilly、Alain Chénedé、Jean-Maurice Mallet、Pierre Sinaÿ
DOI:10.1016/s0040-4039(00)74718-6
日期:1992.12
A series of substituted glycosyl phenyl sulfones was converted into glycals after reductive samariation with SmI2 in the presence of hexamethylphosphoric triamide, followed by elimination of the substituent at C-2. Practically quantitative yields were obtained when the leaving group was an acetate, as illustrated here with seven substrates.
在六甲基磷酸三酰胺存在下,用SmI 2进行还原性卤化后,将一系列取代的糖基苯基砜转化为糖基,然后消除C-2上的取代基。当离去基团是乙酸盐时,实际上可获得定量的产率,如此处所示,具有七个底物。