クロモマイシンA3関連物質のポーラログラフィー〔英文〕
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Chromomycin A<SUB>3</SUB> (A<SUB>3</SUB>), chromomycinone (CHR), 2'-dihydrochromomycinone (H<SUB>2</SUB>CHR), and iso-chromomycinone (iCHR) gave 2-electron reduction waves due to the conjugated ketones at the 1-position and catalytic hydrogen waves in acid solutions, whereas 1-deoxochromomycinone (DOCHR) afforded no wave. Methyl ethers and acetates of A<SUB>3</SUB> and CHR (A<SUB>3</SUB>Me, CHRMe<SUB>2</SUB>, A<SUB>3</SUB>Ac, CHRAc<SUB>6</SUB>) showed the 2-electron reduction waves even in alkaline solutions before their hydrolysis because of lack of hydroxyl to affect on the reduction of carbonyl. Chromomyciquinone (CHQ) afforded a 2-electron 2-proton redox wave to predict the structure of naphthoquinones. The wave was affected by borax to suggest the polyhydroxyl group. It was predicted by polarography, spectroscopy and titration that A<SUB>3</SUB> forms copper chelates, Cu (A<SUB>3</SUB>)<SUB>2</SUB> and Cu (A<SUB>3</SUB>) Ac, in which the pen-standing oxo-enol group will offer the site of chelation.
- 日本ポーラログラフ学会の論文
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- クロモマイシンA3関連物質のポーラログラフィー〔英文〕