Study on Oxazolopyrimidines. V. Preparation of 9-Substituted Hypoxanthines<i>via</i>7-Aminooxazolo[5,4-<i>d</i>]pyrimidines
作者:Yozo Ohtsuka
DOI:10.1246/bcsj.43.3909
日期:1970.12
Reaction of 4-cyano-5-ethoxymethylenaminooxazoles with aliphatic amines gave 7-alkylaminooxazolo[5,4-d]pyrimidines. The structure of these compounds was discussed on the basis of spectroscopic properties. These oxazolopyrimidines were converted to 9-alkylhypoxanthines by treatment with aqueous alkali (Method A) or by heating in formamide (Method B). Reaction of the ethoxymethylenamino compounds with aromatic amines gave 9-arylhypoxanthines directly (Method C).