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De la chimie des ptérines. 78e Communication.. Synthèse de l'ester tripolyphosphorique de la tétrahydro-5, 6, 7, 8-D-néoptérine. Essai d'interprétation de la biosynthèse de la L-sépiaptérine

✍ Scribed by Siméon Antoulas; Max Viscontini


Publisher
John Wiley and Sons
Year
1981
Tongue
German
Weight
264 KB
Volume
64
Category
Article
ISSN
0018-019X

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✦ Synopsis


Synthesis of 5, 6, 7, 8‐Tetrahydro‐D‐neopterine tripolyphosphate. Attempt to Interpret the Biosynthesis of L‐Sepiapterine

The synthesis was achieved by phosphorylation of tetrahydro‐5, 6, 7, 8‐D‐neopterine with polyphosphoric acid. The product is sensitive to light, moisture and oxidation like the other tetrahydropetrines. After oxidation in aqueous solution, D, L‐sepiapterine was isolated in 5% yield. The oxidation of non‐phosphorylated tetrahydro‐5, 6, 7, 8‐D‐neopterine under the same conditions led to D‐sepiapterine without inversion of the configuration. These findings were used to give a tentative explanation for the biosynthesis of natural L‐sepiapterine from the D‐neopterine.


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