Iodocyclisation of polybenzylated allyl alpha-C-fructofuranoside 1 afforded the bicyclic iodoether 2 through debenzylation at C-1: treatment of 2 with zinc and acetic acid restored the all tic group with concomitant deprotection of the hydroxyl group ;at C-1, which as oxidised to the corresponding aldehyde 4. Reaction of 4 with vinylmagnesium bromide afforded diene 5, whose double bonds were reacted regioselectively in order to obtain, upon iodocylisation under different experimental conditions. bicycles 6 or 7, or tricycle 8. (C) 2002 Elsevier Science Ltd. All rights reserve.
The polyfunctionality and conformational rigidity of carbohydrates make this class of compounds ideal scaffolds for the production of sortiments1 of bioactive compounds. Examples of carbohydrate-derived peptidomimetics of biological interest, such as somatostatin agonists and integrin antagonists, are presented. In order to have access to solid phase supported sortiments of compounds, orthogonally