An intramolecular Diels–Alder approach to phorbols: introduction of an oxygenated diene using a palladium catalysed coupling
Abstract
A synthesis of a carbotricycle related to the phorbol skeleton has been achieved in five steps hinging upon an unusual intramolecular Diels–Alder reaction; a usefully oxygenated diene subunit is introduced by a palladium catalysed coupling.