## Abstract The action of polyphosphoric and orthophosphoric acids on glycols and hydroxy‐ethers is described. Apart the phosphorylation of these compounds, some of the side reactions which may occur (etherification of the hydroxy‐compound, scission of the hydroxy‐ether, etc.) are studied.
Recherches sur la formation et la transformation des esters. IX. Sur la phosphorylation des hydroxy-acides par les acides polyphosphoriques
✍ Scribed by Emile Cherbuliez; J. Rabinowitz
- Publisher
- John Wiley and Sons
- Year
- 1956
- Tongue
- German
- Weight
- 450 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
The phosphorylation of hydroxy groups by polyphosphoric acids is shown to be inhibited by carboxyl functions, but the phosphorylation of hydroxy acids can be realized by using their esters, amides or nitriles; the phosphorylated derivatives obtained yield the phosphohydroxy acids either by selective hydrolysis or – for the amides – by reaction with nitrous acid.
📜 SIMILAR VOLUMES
Les monoesters des acides phosphoniques sont peu connus. On en trouve quelques exemplcs dans la litteratwe, mais leur synthkse se fait par des mCthodes tout a fait particuliPrcs. Ainsi, par action de C,H,PCl, sur C,H,OH on obtient l'ester monokthyl-phenylphosphonique2) ; C,H,POCl, trait6 par une mol
## Abstract Hydroxy‐esters (and keto‐esters even more so) are liable to be acidolysed and not phosphorylated when heated with polyphosphoric acid.
## Abstract The authors describe the isolation of cyclic phosphoric esters from the complex mixture produced by the treatment of certain glycols with polyphosphoric acid, mixture which contains in larger amounts hydroxyalkylphosphoric esters. In this way, trimethylenephosphoric acid (yield 15,8%) a
Les t6trahalog6no-2,2,3,3-propanols-l peuvent Ctre obtenus d'une manikre analogue avec le chlore et le brome [S] [6], mais non avec I'iode, comme nom I'avons constatd nous-mCmes. 1) Les chiffres entre crochets renvoient i la bibliographie, p. 2105.
## Abstract In presence of pyro‐ or polyphosphoric acid at high temperature and low pressure, the aminoalkohols can undergo three types of reaction: (A) Phosphorylation, (B) Simultaneous phosphorylation and condensation, (C) Condensation.