Volume 34 (1986) Issue 5 Pages 2268-2271
(±)-Pentalenene, the least oxidized triquinane sesquiterpene, was totally synthesized starting from 4, 4-dimethyl-2-cyclopenten-1-one via a regioselective C2-C8 bond opening of the tricyclo[3.3.0.02, 8]octan-3-one intermediate.