Diastereoselective iodoamidation of 3-acetyloxybut-1-enylamines: simple synthesis of a precursor of aza sugars involving a pyrrolidine ring

3-Acetyloxybut-1-enylamines 3-9 were easily transformed using iodine to pyr rolidine derivatives 3a-9a, precursors for aza sugars, via a diastereoselec tive iodoamidation.