Substituent Effects in the Benzofuran System. III. Cationic Polymerization
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概要
- 論文の詳細を見る
Cationic copolymerizations of various pairs of benzofuran derivatives have been carried out in CH<SUB>2</SUB>Cl<SUB>2</SUB> using SnCl<SUB>4</SUB>–CCl<SUB>3</SUB>CO<SUB>2</SUB>H (2: 1) as catalyst at 0 °C. Effects of 2- and 3-methyl substitutions on the monomer reactivity ratio suggested that the polymeric cation adds at the 2-carbon of benzofuran. Analysis of the effects of 5- and 6-substituents on the reactivity revealed that the transmission efficiency of electronic effects through the two paths, the bonds 8–3 and 9–1–2, is comparable in magnitude. It was concluded that the transition state of the propagation step closely resembles a bridged carbonium ion intermediate.
- 公益社団法人 日本化学会の論文
著者
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Fueno Takayuki
Department of Synthetic Chemistry Kyoto University
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Okuyama Tadashi
Department of Chemistry, Faculty of Engineering Science, Osaka University
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Kunugiza Kiyomitsu
Department of Chemistry, Faculty of Engineering Science, Osaka University
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Fueno Takayuki
Department of Chemistry, Faculty of Engineering Science, Osaka University
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