Access to 5-Methyl-5H-naphtho[2,3-c]carbazole-8,13-dione Derivatives via Copper-Catalyzed Intramolecular Isomerization

Iron(ii)-catalyzed annulation to construct novel quinone-fused cyclopenta[2,1-b]indoles: a promising type I photosensitizer

“…In our previous works, a series of fused-quinones was synthesized using indolynaphthoquinone as a structural unit, through tandem cyclization or Diels–Alder reaction. 19–23 As shown in Scheme 1 and Fig. S1,† based on photophysical data for fused-indolynaphthoquinone derivatives, we speculate that the polycyclic skeleton of indolynaphthoquinone with a five-membered carbocyclic ring may redshift absorption wavelengths.…”