Formaldehyde polymers. 22. Reaction products of 6,8-dimethyl-4-chromanone with formaldehyde - On the dimeric products.
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概要
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The reaction of 6,8-dimethyl-4-chromanone with formaldehyde has been carried out in 96% sulfuric acid. From the mother liquors after obtaining 5-hydroxymethyl-6,8-dimethyl-4-chromanone, the methylene and oxydimethylene dimers of 6,8-dimethyl-4-chromanone, 6,6′,8,8′-tetramethyl-5,7′-methylenedichroman-4,4′-dione and bis(6,8-dimethyl-4-oxochroman-5-ylmethyl) ether, respectively, were isolated by recrystallization. <SUP>1</SUP>H- and <SUP>13</SUP>C-NMR spectra of 5-hydroxymethyl-6,8-dimethyl-4-chromanone in 96% sulfuric acid show the existence of 6,8-dimethyl-4-oxochroman-5-ylmethyl cation. The intermediate ion is stable, not reacting in sulfuric acid.
- 公益社団法人 日本化学会の論文
著者
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Matsuda Haruo
Department Of Applied Chemistry Faculty Of Engineering Osaka University
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Ninagawa Akira
Department of Applied Chemistry, Faculty of Engineering, Osaka University
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- Formaldehyde polymers. 22. Reaction products of 6,8-dimethyl-4-chromanone with formaldehyde - On the dimeric products.