Studies on Benzochromones. V. Synthesis and Ring Isomerization of 2-Methyl-5,8-dimethoxy-6,7-benzochromone.
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概要
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2-Methyl-5,8-dihydroxy-6,7-benzochromone (IV) was obtained by means of either hydroxylation of 2-methyl-8-hydroxy-6,7-benzochromone (I) or reduction of 2-methyl-4H-naphtho [2,3-b] pyrane-4,5,10 (5H, 10H)-trione (III), and synthesis of 2-methyl-5,8-dimethoxy-6,7-benzochromone (V), in which the furan ring of khellin (VI) was replaced by a benzenoid ring, was accomplished by means of methylation of IV. It was found that V underwent irreversible ring isomerization to form 2-methyl-5,6-dihydroxy-7,8-benzochromone (VIII) during demethylation of V with hydriodic acid.
- 公益社団法人日本薬学会の論文
- 1964-03-25
著者
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赤堀 幸男
静岡県立大学 薬学研究科
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赤堀 幸男
Shizuoka College Pharmacy
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上野 明
Shizuoka College of Pharmacy
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福島 清吾
Shizuoka College of Pharmacy
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