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Paper | Special issue | Vol 30, No. 1, 1990, pp.493-500
Published online, 1st January, 1970
DOI: 10.3987/COM-89-S26
Photochemical Reactions of 4-Phenylquinazolin-2-ones

Takehiko Nishio,* Satoshi Kameyama, Yoshimori Omote, and Choji Kashima

*Department of Chemistry, University of Tsukuba, 1-1-1 Ten-nodai, Tsukuba-shi, Ibaraki, 305-8571, Japan


Irradation of 4-phenylquinazolin-2-ones (1) in the presence of hydrogen donor such as xanthene (2a), sulfide (2c), and acylic or cyclic ethers (2b,d-e), gave the C-C bonded 1:1-adducts of (1) and (2) via hydrogen atom abstraction of the excited imino nitrogen of (1), while irradiation of (1) in the presence of triethylamine gave the reduced 3,4-dihydroquinazolin-2-ones.