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Communication | Regular issue | Vol 65, No. 11, 2005, pp.2583-2586
Published online, 13th September, 2005
DOI: 10.3987/COM-05-10520
Photochemical Synthesis of Benzopyrimidosemibullvalenes from Benzopyrimidobarrelenes

Kazue Ohkura,* Mikiko Kudo, Tetsuya Ishihara, Ken-ichi Nishijima, and Koh-ichi Seki

*Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido 061-0293, Japan


UV irradiation (λ= 254 nm) of 5-fluoro-1,3-dimethyluracil with naphthalene afforded a novel benzopyrimidosemibullvalene derivative with H and F atoms remaining intact on the newly constructed moiety. It was found that the semibullvalene could be derived from the initially produced barrelene derivative during irradiation.