**A general method for synthesis of folic acid, its conjugates and analogues**. A new and general method for the synthesis of folic acid, folic acid conjugates and folic acid analogues is described. The key step, __i.e.__ the condensation of N(2′)‐acetyl‐6‐formyl‐pterine (I: R^1^ COCH~3~) with am
Über Pterinchemie. 38. Mitteilung. Neue Synthesen von Folsäureanalogen
✍ Scribed by M. Viscontini; J. Bieri
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- German
- Weight
- 381 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Zusammenfassung. Eine einfache Synthese des 6-Formylpterins &us Neopterin wird beschrieben. Dieses isomerenfrei erhaltene Produkt wird als Edukt fur die Herstellung yon sehr reinen, isomerenfreien Folsaureanalogen verwendet. Das 6-Forniylpterin wird mit p-4minoarylLDerivaten zu 6-Azomethin-pterinen kondensiert. Die -CH=N-Gruppierung laisst sich dann mit NaBH, sehr leicht unter Bildung der entsprechenden Amino-methyl-pterinen reduzieren.
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**Regiospecific deuteriation of folic acid** Introduction of a nitroso function at the N (10)‐position of folic acid activates the C(9)‐hydrogen atoms in such a way, that the exchange of H with D at this position, in NaOD‐solution, is extremely facilitated. This fact is utilized in the synthesis of
## Abstract A new, simplified and unequivocal synthesis of folic acid free of isomers is described. A melt of N(2′)‐acetyl‐6‐formylpterine and dimethyl‐N‐(__p__‐aminobenzoyl)‐L‐glutamate was quantitatively converted to 6‐azomethin‐pterine‐ester IV. NaBH~4~‐reduction followed by basic hydrolysis of
**A new, regiospecific synthesis of L‐biopterine** Pure L‐biopterine (I) is obtained in 35–40% yield by condensation of 5‐desoxy‐L‐arabinose‐hydrazone acetate with 2,4,5‐triamino‐6‐hydroxy‐pyrimidine, followed by oxidation of the formed tetrahydro‐derivative and deacetylation of the L‐bioterine dia
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