Construction of cis-azadecalone units via novel intermolecular Diels–Alder reaction

Abstract N -Methoxycarbonyl-5-ethoxycarbonyl-2,3-dihydropyridin-4-one 1 reacts under thermal or Lewis acid-catalysed conditions with trimethylsilyloxybutadienes to give cis -azadecalones via a formal [4+2] cycloaddition.