Resumen:
The N-substituted exo-2-oxazolidinone dienes are
versatile molecules that undergo a variety of reactions. To
further explore this versatility, Diels-Alder reactions were
carried out with novel naphthalene chalcones. Upon attempting
the Diels-Alder reaction with 2-hydroxy-1,4-naphthoquinone, the formation of chromene unexpectedly took place
via a formal [3+3] cycloaddition reaction. The observed
reaction was then achieved with other 1,3-dicarbonyl compounds