To demonstrate the utility of the products we performed first a Diels-Alder cycloaddition of diene 2n with maleic anhydride, resulting in the formation of cyclohexene 3 in 69% yield (Scheme 4, Eq. 1). Furthermore, hetero-Diels-Alder cycloaddition reaction of 2n with nitrosobenzene gave heterocycle 4 in 61% yield as a single regioisomer (Scheme 4, Eq. 2).