A naphtalene-1,4-difluorobenzene biplanemer 1a has been prepared through the electrolytic oxidative didecarboxylation. The direct irradiation of 1a gave 1,4-difluorobenzene and excited naphthalene in both a singlet state (Φf = 0.098) and a triplet state (Φp = 0.029) at 77 K in EPA. In the triplet-sensitized reaction, the biplanemer 1a underwent intramolecular [2π+2π] cycloaddition to give a cage compound
Characterization of a Longicyclic (2,2,2,2) Conjugated π System in 1,4-Difluorobenzene–Naphthalene Biplanemer
作者:Hideki Okamoto、Kyosuke Satake、Masaru Kimura
DOI:10.1246/bcsj.68.3557
日期:1995.12
nm. This was attributable to intramolecular charge transfer interaction between the longicyclic conjugated π system and the benzene chromophore. The oxidation potential of 1 was 1.70 V (vs. Ag/AgCl), which was lower than those of the related compounds in which one of the doublebonds of 1 was hydrogenated. Thermally, the biplanemer 1 underwent facile Cope rearrangement, followed by dehydrofluorination