Retro: Cycloisoindole, which has a saddle-shaped geometry (see picture, 2), was synthesized by oxidative coupling of a bicyclo[2.2.2]octadiene(BCOD)- fused 2,2′-bipyrrole followed by a retro-Diels-Alder reaction of BCOD-fused cyclopyrrole (1). Key trends in the optical spectra of ring-annelated cyclopyrroles are identified based on magnetic circular dichroism spectra and theorectical calculations.
- density functional calculations
- retro-Diels-Alder reaction
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