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Bicyclo[2.2.2]octadiene(BCOD)-fused trithiasapphyrin was prepared by 3+2 condensation of BCOD-fused thiatripyrrane with BCOD-fused bithiophene. The BCOD-fused trithiasapphyrin was successfully converted to pentabenzo[b,g,l,q,v]sapphyrin by the thermal retro-Diels–Alder reaction. In this case, trithiapentabenzo[b,g,l,q,v]- and trithiadibenzo[g,q]sapphyrins were selectively prepared by control of the...
Bi- and tri-isothianaphthene-α,ω-dicarbaldehydes were easily synthesized by using 4,7-dihydro-4,7-ethano-2-benzo[c]thiophene as a useful synthon of 1,3-unsubstituted isothianaphthene. The UV–vis absorptions of oligo-isothianaphthene derivatives exhibit a considerable bathochromic shift compared to the cases of other oligo-thiophene analogs, and their cyclic voltammetry shows narrowed HOMO–LUMO gaps...
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