Cyclization Reactions of 1,2-Bis(2-cyanophenyl)propionitriles. II. Synthesis of 5-amino-4,7-dimethoxy-11<I>H</I>-indeno-[1,2-<I>c</I>]isoquinolin-11-one
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概要
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The structure of 5-amino-4,7-dimethoxy-11<I>H</I>-indeno-[1,2-<I>c</I>]isoquinolin-11-one (<B>2</B>) derived by the degradation of the "red pigment" has been confirmed by synthesis. 5,6-Dihydro-4,7-dimethoxy-11<I>H</I>-indeno[1,2-<I>c</I>]isoquinoline-5,11-dione (<B>3</B>) obtained from <B>2</B> was used as a relay compound. This was first converted into <B>2</B> by chlorination with phosphorus oxychloride and treatment with ammonia. Subsequently <B>3</B> was synthesized from 2-(2-carboxy-3-methoxyphenyl)-4-methoxyindane-1,3-dione (<B>13</B>) <I>via</I> 4,7-dimethoxy-11<I>H</I>-indeno[1,2-<I>c</I>]isocoumarin-11-one (<B>12</B>).
- 公益社団法人 日本化学会の論文
著者
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Kubota Takashi
Faculty Of Medicine Kinki University
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Tokoroyama Takashi
Faculty Of Science Osaka City University
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Ando Kazuo
Faculty of Science, Osaka City University
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