Abstract
WE have recently prepared isoxanthopterin (2-amino-4:7-dihydroxypteridine) by a new synthesis, namely, the condensation of triamino-4-hydroxypyrimidine with ethyl glyoxylate hemiacetal. The synthesis, purification and analysis will be reported in detail elsewhere. The ultra-violet spectrum of the product consisted of three peaks at the λmax. values previously reported1,2, but the extinction coefficients were so much higher as to suggest that the samples previously examined contained no more than 80 per cent of isoxanthopterin. Our results are as follows (material dried at 150°, analysing as anhydrous, dissolved in 0.1 N potassium hydroxide).
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References
Hüttel and Sprengling, Annalen, 554, 69 (1943).
Tschesche and Korte, Ber., 84, 801 (1951).
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ALBERT, A., WOOD, H. Isoxanthopterin. Nature 172, 118 (1953). https://doi.org/10.1038/172118b0
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DOI: https://doi.org/10.1038/172118b0
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