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Communication | Regular issue | Vol 55, No. 6, 2001, pp.1015-1018
Published online, 1st January, 1970
DOI: 10.3987/COM-01-9195
Acid-catalyzed Photorearrangement of the Bond-switching Isomer of a Pentamethylcyclooctapyrimidine-2,4-dione

Kazue Ohkura, Ken-ichi Nishijima, Shun Uchiyama, Akiyo Sakushima, and Koh-ichi Seki*

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


UV-irradiation of the tautomer (4c) of 1,3,6,8,10-pentamethylcyclooctapyrimidine-2,4-dione (1c) in the presence of TFA gives 9, 11-diazapentacyclo[,3.02,6.04,8]dodecane (5) and pentaleno[2,1-d]pyrimidine (6).