Photochemistry of 4(3H)-pyrimidin-4-ones. Formation of medium-ring lactams |
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| Authors: | Yoshiro Hirai Takao Yamazaki Shun-ichi Hirokami Masanori Nagata |
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| Institution: | Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, Sugitani, Toyama 930-01, Japan;Laboratory of Chemistry, Toyama Medical and Pharmaceutical University, Sugitani, Toyama 930-01, Japan |
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| Abstract: | Upon irradiation, 4(3H)-pyrimidin-4-one(1) afforded a di-imine derivative(2) which, when hydrolyzed in an acidic methanol solution, gave N-methyl acetoacetamide(3). On the other hand, the fused 4(3H)-pyrimidin-4-ones, (4) and (5), gave medium-ring lactams(6) and (7), which were hydrolyzed in an acidic methanol solution to give (8) and (9), respectively. |
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