Syntheses of 1,6-Dimethylpyrimido [4,5-c] pyridazine-5,7 (1H, 6H)-diones (4-Deazatoxoflavins) and Their Use in the Autorecycling Oxidation of Alcohols and Amines

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概要

• 論文の詳細を見る

• Treatment of 3-methyl-6-(1-methylhydrazino) uracil (I) with phenacyl bromides in ethanol afforded the corresponding 3-aryl-4,8-dihydro-1,6-dimethylpyrimido [4,5-c]-pyridazine-5,7 (1H, 6H)-diones (3-aryl-4,8-dihydro-4-deazatoxoflavins) (II) and 3-aryl-1,7-dimethyl-6,8-dioxo-1,4,6,7,8-pentahydropyrimido [4,3-c]-as-triazines (III). Oxidation of II with diethyl azodicarboxylate gave the corresponding 3-aryl-4-deazatoxoflavins (IV) in quantitative yields. The reaction of aryl aldehyde N-methyl-N-(3-methyluracil-6-yl)-hydrazones (VII) with triethyl orthoformate in dimethylformamide also gave the corresponding 3-aryl-4-deazatoxoflavins (IV). Compounds IV thus obtained oxidized alcohols under alkaline conditions in the dark to yield the corresponding carbonyl compounds, while they themselves were hydrogenated to compounds II. Under certain conditions, these oxidations were automatically recycled to give the corresponding carbonyl compounds in more than 100% yields.

• 公益社団法人日本薬学会の論文
• 1981-02-25

著者

• 中川 敬士

  Faculty of Pharmaceutical Sciences, Kumamoto University

• 米田 文郎

  Faculty Of Pharmaceutical Sciences Kyoto University

• 樋口 昌嗣

  Faculty Of Pharmaceutical Sciences Kumamoto University

• 野口 みつ子

  Faculty of Pharmaceutical Sciences, Kumamoto University

• 野口 みつ子

  Faculty Of Pharmaceutical Sciences Kumamoto University

• 中川 敬士

  Faculty Of Pharmaceutical Sciences Kumamoto University

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