Selective electrosyntheses on chemically modified electrode. II. Anodic chlorination of anisole with cyclodextrin on electrode surfaces and in solution.
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概要
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The anodic chlorination of anisole on an α-cyclodextrin (α-CD) chemically modified electrode <I>via</I> ether linkage (α-CD-CME) and a naked graphite electrode with α-CD or β-CD in solution was studied. In the presence of CD, the <I>p</I>- to <I>o</I>-chloroanisole ratio, formed in the reaction, was higher than that in the absence of CD since <I>o</I>-positions of anisole included in CD are blocked by the inner wall of CD. Especially, α-CD had a profound effect on the <I>p</I>-isomer formation. Increasing the concentration of NaCl added as a supporting electrolyte in the presence of α-CD resulted in a decrease in the ratio because of the inhibition effect of chloride ion on the inclusion of anisole in α-CD, whereas such effect was small in the presence of β-CD. The ratio on α-CD-CME was slightly higher than that on the naked electrode. This indicates that α-CD was introduced on the graphite surface but the surface coverage of α-CD was low, which was in accord with the ESCA results of α-CD-CME.
- 公益社団法人 日本化学会の論文
著者
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Osa Tetsuo
Pharmaceutical Institute Tohoku University
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Fujihira Masamichi
Pharmaceutical Institute, Tohoku University
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Matsue Tomokazu
Pharmaceutical Institute, Tohoku University
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