E. Piers et al., Sequential anionic 1,3 ester shifts and intramolecular Stille couplings: Anew protocol for the concise assembly of functionalized polycyclic dienes, SYNLETT, (7), 1999, pp. 1082-1084
The novel, functionalized tricycles 24-26 are readily synthesized via conci
se routes that employ key tandem anionic 1,3-ester shift and intramolecular
Stille coupling protocols. The potential value of this methodology is demo
nstrated further by the preparation of the struturally unique tetraquinane
keto ester 31.