1 -<9- glycosyl donor

This ester was designed as a protective group for the 2-position in glycosyl donors. It has the stability of the benzoate during glycosylation, but has the ease of removal of the chloroacetate. It is readily introduced through the acid chloride... [Pg.191]

III. Conversion of Thioglycosides Into Other Glycosyl Donors. 183... [Pg.179]

VIII. Glycosyl Sulfoxides, Sulfones, and Selenoglycosides as Glycosyl Donors. 198... [Pg.179]

Of the many methods described for glycoside synthesis, those predominantly used in current oligosaccharide synthesis, in which the glycosyl donor has O- or N- functionality at C-2 (that is, excluding 2-deoxyglycosides), are the following ... [Pg.180]

In the crucial step of the synthesis (Scheme 16), the disaccharide glycosyl donor 17 was used once again, in condensation with the acceptor 19 having two free OH groups, to produce the octasaccharide 20. This product was then converted in 7 steps via the 1-trichloroacetamido compound, analogous to the synthesis described in Scheme 15, into the final compound 21. [Pg.195]

The synthesis is an excellent example of the use of thioglycosides as glycosyl donors in the block synthesis of complex oligosaccharides as well as the use of partial glycosylation of diols to achieve short paths to the target. [Pg.195]

Glycosyl sulfones, normally of low reactivity, have been reported as glycosyl donors, activated by magnesium bromide etherate.188... [Pg.199]

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