Thermostat auf 130,5O eingestellt und dic RG des 3-exo-Chlorids la gemessen. Zu diesem Zweck musste die durch die Reaktion von 2a hervorgerufene Leitfahigkeit durch einen Widerstand kompensiert werden.
Recherches sur la formation et la transformation des esters XXIII. Sur la préparation des acides carboxy-alcoylphosphoriques
✍ Scribed by Emile Cherbuliez; E. A. Denzler; F. Hunkeler; J. Rabinowitz
- Publisher
- John Wiley and Sons
- Year
- 1960
- Tongue
- German
- Weight
- 327 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Hydroxy‐esters (and keto‐esters even more so) are liable to be acidolysed and not phosphorylated when heated with polyphosphoric acid.
📜 SIMILAR VOLUMES
## Abstract Phosphorylcholine is obtained with a good yield when 1 mole of choline or choline chloride is heated with 0,5 to 0,6 mole of pyrophosphoric acid (or the corresponding amount of polyphosphoric acid) for 20 hours at 150° under reduced pressure.
## Abstract Poly‐cyclohexanephosphonic acid is obtained very easily by heating cyclohexanephosphonic acid, under reduced pressure, at 180–190°C, for 96 to 150 hours.
0‐, __m__‐ and __p__‐sulfophenylphosphoric acids have been prepared from PC1~5~ and the corresponding phenolsulfonic acids. The rates of hydrolysis of these phosphoric esters at pH 0 (HCl 1N), 4,5 and 14 (NaOH 1N) and at 100° have been established.
## 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
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