Thioglycosides protected as trans-2,3-cyclic carbonates have significantly lower anomeric reactivities than fully acylated and N-acyl-protected thioglycosides and can be used as acceptors in chemoselective glycosylations with a wide range of thioglycosyl donors. The resulting thioglycosides can be further activated to give 1,2-cis-linked glycosides. [reaction: see text]
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Zhu et al. (2001) studied this question.
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