The Photoreaction of 2,6-Diphenyl-4<I>H</I>-thiopyran-4-one and Its Related Compounds

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概要

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• The irradiation of 2,6-diphenyl-4<I>H</I>-thiopyran-4-one (<B>1</B>) or 2,6-diphenyl-4<I>H</I>-pyran-4-one (<B>2</B>) in an alcohol in the presence of oxygen gave benzoic acid and a benzoylacetic acid ester, while that of <B>2</B> in benzene or 2,6-dimethyl-4<I>H</I>-thiopyran-4-one (<B>5</B>) in various solvents gave the corresponding cage dimer, (<B>9</B>) or (<B>10</B>). No photoreaction could be observed in case of the irradiation of 1,2,6-trimethyl-4-pyridone (<B>3</B>) and 6-methyl-1,2-diphenyl-4-pyridone (<B>4</B>). A reaction mechanism <I>via</I> the triplet state of the substrate was also proposed.

• 公益社団法人 日本化学会の論文

著者

• Sato Yoshiaki

  Department of Applied Quantum Physics, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan

• Sugiyama Noboru

  Department of Chemistry Faculty of Science Tokyo University of Education

• Kashima Choji

  Department of Chemistry, The University of Tsukuba

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