Studies on Synthesis of Coumarin Derivatives. XV. On the Preparation of Ethyl Pyranobenzoxazole-carboxylates.
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概要
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The reaction between ethyl ο-nitro-hydroxy-3-coumarincarboxylates (I, VI, and XI) with zinc powder in acetic acid, acetic anhydride, or a mixture of acetic acid and acetic anhydride were examined. The reaction of the ο-nitro-hydroxy compounds in acetic acid gave ethyl ο-amino-hydroxy-3-coumarincarboxylates (II, VII, and XII) and in a mixture of acetic acid and acetic anhydride yielded ethyl ο-acetamido-hydroxy-3-coumarincarboxylates (III, VIII, and XIII). The amino and acetamido compounds were refluxed with acetic anhydride to obtain ethyl ο-dicaetylamino-acetoxy-3-coumarincarboxylate (IV, IX, and XIV). The acetamido compounds obtained were fused with phosphorous pentoxide to yield new ethyl pyranobenzoxazolecarboxylates (V, X, and XV).
- 公益社団法人日本薬学会の論文
- 1966-10-25
著者
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市川 正孝
Faculty Of Pharmaceutical Sciences Kumamoto Univerisity
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西海枝 東雄
Faculty of Pharmaceutical Sciences, Kobe Gakuin University
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西海枝 東雄
Faculty Of Pharmaceutical Sciences Kobe Gakuin University
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西海枝 東雄
Faculty Of Pharmaceutical Sciences Kyushu University
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