Recherches sur la formation et la transformation des esters LXXXIII [1]. Réactions de condensation et/ou de phosphorylation, en solution aqueuse, de divers composés organiques à fonctions OH, COOH, NH2, ou autres, à l'aide de polyphosphates linéaires ou cycliques
✍ Scribed by Joseph Rabinowitz
- Publisher
- John Wiley and Sons
- Year
- 1969
- Tongue
- German
- Weight
- 568 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Surnnzary. Amino acids and other derivatives are condensed in aqueous solutions in the presence of linear or cyclic polyphosphates (or other anhydrides of P acids). The best results arc obtained in slightly alkaline media (pH 7.5 t o 9.5). The reaction, which has been studied a t 70°C and at room temperature, proceeds with relative ease even a t room temperature. I n the case of the cyclic polyphosphates, trimetaphosphate gave the best results as compared with tetra-and hexametaphosphate, and among the linear polyphosphatcs used the yields grew with the average Icngth of the chain.
The significance of this method of condensation as a general method and also in the context of chemical evolution is discussed.