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The synthesis of biologically relevant glycosylamino acids using a non-natural amino acid as the glycosyl acceptor is described. The glycosylation reaction of a monosaccharide tri-chloroacetimidate donor with Fmoc-l-hydroxynorleucine benzyl ester provided the α-O-linked product. Conversely, when the glycosylation reaction was carried out with a glycal epoxide donor, the β-O-linked product predominated...
A new approach to the synthesis of biologically relevant glycosyl amino acids using a non-natural amino acid as the glycosyl acceptor is described. The procedure involves a glycosylation reaction of a suitable carbohydrate donor with Fmoc-l-hydroxynorleucine benzyl ester. This reaction results in the direct incorporation of the amino acid moiety. The acceptor can be used for the preparation of α-...
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