Polypropionates from 7-oxanorbornene derivatives. A stereoselective and divergent synthesis of fragments with four contiguous chiral centers

Article abstract of DOI:10.1016/S0040-4039(96)02057-6

The epimeric stereotetrads 12 and 14 have been prepared starting from the Diels-Alder endo adduct of furan and acrylic acid. The key steps of the route were the alkylative cleavage of the oxygen bridge and the transformation of the resulting cyclic vinyl