Synthesis of 5-(substituted styryl)-2-aminotropones.
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概要
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The methylation of 4-styryltropolones with diazomethane afforded 2-methoxy-4-styryltropones (<B>2a–g</B>) and 2-methoxy-6-styryltropones. The reactions of <B>2a–g</B> with hydrazine gave 2-hydrazino derivatives, which were converted to 2-chloro derivatives <B>5a–g</B>. Ammonolysis of <B>5a–g</B> afforded 2-amino-5-styryltropones (<B>7a–g</B>) by <I>ciné</I> substitution reaction. The compounds <B>7a–g</B> were hydrolyzed to give the corresponding 5-styryltro-polones. Some interesting by-products were also found in these synthetic processes.
- 公益社団法人 日本化学会の論文
著者
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IMAFUKU Kimiaki
Department of Chemistry, Faculty of Science, Kumamoto University
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Matsumura Hisashi
Department of Chemistry, Faculty of Science, Kumamoto University
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Kobayashi Toshio
Department of Chemistry, Faculty of Science, Kumamoto University
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KOBAYASHI TOSHIO
Department of Chemical Engineering, University of Tokyo
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