Add time:09/03/2019         Source:sciencedirect.com

The synthesis of Nα-fluorenylmethoxycarbonyl-trans-4-hydroxy-4-O-[(2,3,4,6-tetra-O-acetyl)-α-d-mannopyranosyl]-l-proline allyl ester and Nα-fluorenylmethoxycarbonyl-trans-4-hydroxy-4-O-[(2,3,4,6-tetra-O-benzoyl)-α-d-mannopyranosyl]-l-proline allyl ester is described. Glycosylation using Königs–Knorr conditions with a benzoyl protected glycosyl donor provided the optimum method. Removal of the allyl ester gave two mannosylated building blocks suitable for solid phase glycopeptide synthesis.

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