Keteneおよびその誘導体の研究(第34報) : Diketeneとウレタンおよび酸アミドとの反応
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Reaction of diketene with urethan and acid amide was examined. Heating of urethan with excess of diketene results in the formation of N-acetoacetylurethan (III) and N-ethoxycarbonyl-2,6-dimethyl-4-oxo-4H-pyran-3-carboxamide (IV). IV is also obtained by refluxing III and diketene in benzene, in the presence of triethylamine. Acetamide and benzamide react with diketene in acetic acid to form respectively N-acetoacetyl-acetamide (VI : R=CH_3) and N-acetoacetylbenzamide (VI : R=C_6H_5). Under the same condition, formamide and diketene form 3-acetyl-6-methyl-2,4-pyridinedione (V) but the corresponding products were not isolated in the reaction with other acid amides.
- 公益社団法人日本薬学会の論文
- 1969-12-25
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関連論文
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