New synthetic routes to complex sucrose derivatives are presented. They are based on a highly selective silylation of the hydroxyl group at the C6′ position (‘fructose end’) in 2,3,3′,4,4′-penta-O-benzylsucrose followed by functionalization of the remaining (C-1′,6) positions. One of these synthons was used as a chiral platform for the construction of aza-macrocyclic systems.
Key words
sucrose - protecting groups - regioselectivity - phase-transfer catalysis - macrocycles