The intramolecular Diels–Alder reaction with allenic ester dienophiles
Abstract
Methyl (E,E)-dodeca-2,3,8,10-tetraenoate and (E,E)-undeca-2,3,7,9-tetraenoate have been prepared and shown to undergo intramolecular Diels-Alder reactions, the latter spontaneously at ambient temperature.