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Paper | Special issue | Vol 56, No. 1-2, 2002, pp.235-244
Published online, 1st January, 1970
DOI: 10.3987/COM-01-S(K)23
Synthesis of 9,11-Diazapentacyclo[,3.02,5.04,8]dodecane-2,4-diones

Kazue Ohkura, Ken-ichi Nishijima, Yuji Kuge, and Koh-ichi Seki*

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


UV-Irradiation of 5,6-dihydrocyclobutaquinazoline-2,4-dione derivatives (1c-g) furnished the corresponding 9,11-diazapentacyclo-[,3.02,5.04,8]dodecane-10,12-diones (2c-g) in fair yields, whereas photoreaction of cyclobutaquinazoline-2,4-dione (1h) produced quinazoline-2,4-dione (4) and cyclooctapyrimidine (5).