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C-glycosides from sugars

FIGURE 7.15 Example of C-glycosides from sugar lactones. [Pg.316]

Until now, all methods mentioned for the formation of C-glycosides from sugar lactones involve the incorporation of Lewis acid-trialkylsilane methodology for the deoxygenation. However, there are other methods for accomplishing this reaction. One particular example, shown in Scheme 7.48, was reported by Wilcox and Cowart [158] and involves the use of sodium cyanoborohydride in the presence of dichloroacetic acid. This reaction gave a 68% yield. Moreover, the use of p-toluenesulfonic acid instead of dichloroacetic acid totally blocked the desired transformation. [Pg.317]

SCHEME 7.51 C-Glycosides from sugar-derived enones. [Pg.319]

Scheme 2.10.1 C-Glycosides from Sugar-Derived Enones ... Scheme 2.10.1 C-Glycosides from Sugar-Derived Enones ...
See other pages where C-glycosides from sugars is mentioned: [Pg.314]    [Pg.316]    [Pg.317]    [Pg.317]    [Pg.318]    [Pg.318]    [Pg.319]    [Pg.298]    [Pg.300]    [Pg.301]    [Pg.301]    [Pg.302]    [Pg.302]    [Pg.303]    [Pg.108]    [Pg.111]    [Pg.112]    [Pg.112]    [Pg.113]    [Pg.113]    [Pg.114]    [Pg.114]    [Pg.114]    [Pg.115]    [Pg.116]    [Pg.118]   
See also in sourсe #XX -- [ Pg.10 , Pg.388 , Pg.389 , Pg.390 , Pg.391 , Pg.392 , Pg.393 ]



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