Y. Hirai et al., EFFICIENT SYNTHESIS OF THE TAXANE C-RING BY FRAGMENTATION REACTION OFA BICYCLO[2.2.2]OCTANE DERIVATIVE, Tetrahedron letters, 38(28), 1997, pp. 4997-5000
Compounds 3, the C/D ring moiety of paclitaxel without a 7-hydroxyl gr
oup, and 4, the C ring moiety of O-cinnamoyltaxicin-I (2), were synthe
sized stereoselectively from methyl S)-3-(2,2-dimethyl-1,3-dioxolan-4-
yl)-2-pentenoate (5) using the fragmentation reaction of bicyclo[2.2.2
]-octane derivative 9 as a key step to give 10. (C) 1997 Elsevier Scie
nce Ltd.