Study on Oxazolopyrimidines. VI. Formation of 3-Substituted Xanthines <I>via</I> 7(6<I>H</I>)-Iminooxazolopyrimidines

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概要

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• The condensation of several primary amines with 4-cyano-5-dialkoxymethylenaminooxazole gave 6-substituted 5-alkoxy-7(6<I>H</I>)-immooxazolo[5,4-<I>d</I>]pyrimidines. These compounds were converted into 3-substituted xanthines by treatment with aqueous alkali or by heating in formamide. The present reaction was compared with an analogous reaction, formation of 9-substituted hypoxantines <I>via</I> 7-aminooxazolo[5,4-<I>d</I>]pyridimine derivatives, and the difference in the reaction course was discussed in terms of the effect of substituents on the stability of oxazolopyrimidine intermediates.

• 公益社団法人 日本化学会の論文

著者

• Ohtsuka Yozo

  Sagami Chemical Research Center

関連論文

• The Formation of 6,8-Dihydroxypurine by the Oxidation of 7-Aminooxazolo[5,4-d]pyrimidine with Hydrogen Peroxide-Acetic Acid
• Study on Oxazolopyrimidines. II. Conversion of 7-Aminooxazolo-[5,4-d]pyrimidines into Hypoxanthine Derivatives
• Study on Oxazolopyrimidines. VI. Formation of 3-Substituted Xanthines via 7(6H)-Iminooxazolopyrimidines
• Study on Oxazolopyrimidines. V. Preparation of 9-Substituted Hypoxanthines via 7-Aminooxazolo[5,4-d]pyrimidines

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