Mg. Banwell et al., FROM TOLUENE TO TAXOL(TM) - CHEMOENZYMATIC AND ENANTIODIVERGENT ROUTES TO THE AB-RING SYSTEMS OF TAXOIDS AND ENT-TAXOIDS, Synlett, (8), 1998, pp. 897
The cis-1,2-dihydrocatechol 2 has been converted, via reaction sequenc
es including Diels-Alder cycloaddition and anionic oxy-Cope rearrangem
ent steps, into the enantiopure bicyclo[5.3.1]undecanes 20 and 33 whic
h correspond to the AB-ring systems of ent-taxoids and taxoids, respec
tively.