First syntheses of 1,13- and 1,15-dihydroxyherbertenes, and herbertenolide by applying intramolecular Heck reaction for the construction of adjacent quaternary centers
1,13- and 1,15-Dihydroxyherbertenes and hebertenolide, typical herbertane-type sesquiterpenes with an oxidized methyl group, were synthesized by using intramolecular Heck reaction for the construction of adjacent quaternary centers. (C) 2001 Elsevier Science Ltd. All rights reserved.
Tandem Cope-Claisen rearrangement. Scope and stereochemistry