An efficient stereocontrolled synthesis of (±)-pseudoclovene-B (3) has been accomplished, involving aryl participated intramolecular cyclisation of the bromophenol (10) as the key step.
A stereocontrolledapproach to the construction of the tricyclo[6.3.1.01,6]dodecane ring system related to the sesquiterpene pseudoclovene-B (3) is delineated. Starting from the indanone 4, the bromophenol 5 was prepared in a straightforward manner. An aryl participated intramolecular cyclisation of 5 afforded the tricyclic dienone 6 which was stereoselectively converted into the A/B cis-fused ketone