Jd. Winkler et al., STEREOSELECTIVE SYNTHESIS OF A SYNTHON FOR THE A-RING OF TAXOL FROM R-(-VERBENONE()), Tetrahedron letters, 36(13), 1995, pp. 2211-2214
The efficient conversion of R-(+)-verbenone to bicyclic lactone 6, a p
otentially useful intermediate for the synthesis of taxanes, is descri
bed. The introduction of C-1 (taxane numbering) oxygen functionality i
s also reported, thereby completing the synthesis of the A-ring subuni
t of taxol.