Photoinduced one-electron reduction of 1-benzyl-3-carbamoylpyridinium chloride and 3,5-bis(ethoxycarbonyl)-2,6-dimethylpyridine.
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概要
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Photolysis of 1-benzyl-3-carbamoylpyridinium chloride (BNA<SUP>+</SUP>) in aqueous solution in the presence of diethylamine and/or ethylenediaminetetraacetate gives the 6,6′-dimer (<B>1</B>), a coupled product of the pyridyl radicals generated by one-electron transfer from alkylamine to photoexcited BNA<SUP>+</SUP>. Thermal one-electron reduction of BNA<SUP>+</SUP> either with zinc dust/copper sulfate or with magnesium powder in aqueous alkaline medium yields the 4,6′-dimer (<B>2</B>) together with a small amount of <B>1</B>. In the case of 3,5-bis(ethoxycarbonyl)2,6-dimethylpyridine (HE<SUB>ox</SUB>), the 2,2′-dimer (<B>3</B>) is formed as an initial photoreduction product, which is converted into the 4,4′-dimer (<B>4</B>) and 1,2-dihydropyridine (<B>5</B>) upon prolonged irradiation.
- 公益社団法人 日本化学会の論文
著者
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Matsuo Taku
Department Of Chemical Science And Technology Faculty Of Engineering Kyushu University
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Kano Koji
Department Of Molecular Science And Technology Doshisha University
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