This paper deals with a new methodology for the synthesis of the polyhydrox
ylated azetidinic alkaloids encountered in the penaresidin and penazetidin
family using the previously described epoxide 6. The main feature of this s
ynthesis lies in the absence of amine and/or hydroxyl protection/deprotecti
on sequences usually encountered in the last steps of the synthesis devoted
to the heterocycle ring closure. (C) 1999 Academie des sciences/Editions s
cientifiques et medicales Elsevier SAS.