. J. Chem. 62, 1558Chem. 62, (1984.The Diels-Alder product 3 was first transformed into the symmetrical nine-membered cyclic carbonate 8. Reaction of 8 with 1-(-)-a-methylbenzylamine (12) yielded a mixture of optically active diastereoisomeric urethanes 9 a (9, R = H, R' = C6H5CHCH3NHCO-) and 96 (9, R = C6H5CHCH3NHCO-, R' = H) which were separated and respectively converted into l l a and l l b . Compounds l l a and l l b were then transformed respectively into the optically active side chain alcohol 2 (R = H) of vitamine E (1).GERVAIS BERUBE et PIERRE DESLONGCHAMPS. Can. J. Chem. 62, 1558 (1984.Le produit de Diels-Alder 3 fut transforme en carbonate symCtrique cyclique i neuf membres 8. La rkaction de 8 avec la I-(-)-a-mkthylbenzylamine a donnC les urCthanes diastCrCoisomCriques optiquement actifs 9 a (9, R = H, R' = C6H5CHCH3-NHCO-) et 96 (9, R = C6H5CHCH3NHCO-, R' = H) qui furent s6parCs et respectivement transformis en composCs l l a et l l b . Ces derniers ont conduit par la suite i la chaine latCrale de la vitamine E, i.e. l'alcool 2 (R = H) optiquement actif.