Scheme 1. Synthesis of Anomeric Mannopentaoside Azidopropyl Spacer Derivatives 2 and 4.
Reagents and conditions: K2CO3, imidazole-1-sulfonyl azide·HCl, 0.1 M CuSO4·5H2O, 2:1 MeOH–H2O, rt 24 h.
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