A cis-perhydroindanone synthesis utilising an intramolecular Diels–Alder reaction
Abstract
An intramolecular Diels–Alder reaction of 2-methylnona-1,6,8-trien-3-one yields cis-2,3,3a,6,7,7a-hexahydro-7a-methylhydrinden-1-one as the major product. The triene is readily synthesised from penta-1,4-dien-3-ol.