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Commercially available and synthesized monosaccharide building blocks. Reagents and conditions: (a) TsCl (3.0 eq), TEA (2.0 eq), DMAP (1.0 eq), anh. CHCl3, rt, 48 h, 71%; (b) NaN3 (7.5 eq, in portions), DMF, 150 °C, 144 h, 48%; (c) TEMPO (0.2 eq.), BAIB (2.5 eq.), 4:4:1 DCM:tBuOH:H2O, rt, 4.75 h, 80%.
