1,3,3-トリメチル-2-メチレンインドリンの重合
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概要
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The polymerization of 1, 3, 3-trimethy1-2-methyleneindoline (Fischer's base: FB (I)), prepared by Fischer's indole synthesis, was investigated. While the radical copolymerizations of FB (I) with ethyl acrylate or acrylonitrile in bulk using azobisisobutyronitrile as initiator gave alternating copolymers, no homopolymerization of FB (I) occurred under similar conditions. Comparison of the spectral data of FB (I) with those of the copolymers showed that the <I>exo</I>-methylene group in FB (I) was involved in the polymerization. The <I>Q</I> and <I>e</I> values of FB (I) were calculated to be 1.92 and -1.40, respectively. Under cationic polymerization conditions, FB (I) merely formed quaternary salts with protonic acids or Lewis acids due to the highly basic character of FB (I) and gave no polymeric products. Similar polymerization reactions of 5-substituted 1, 3, 3-trimethyl-2-methyleneindolines were also investigated.
- 公益社団法人 高分子学会の論文
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