Protolytic properties and reactivity of aminomethylated calix[4]resorcarenes in reactions with esters of phosphorus acids

Citation
Is. Ryzhkina et al., Protolytic properties and reactivity of aminomethylated calix[4]resorcarenes in reactions with esters of phosphorus acids, RUSS CHEM B, 48(3), 1999, pp. 453-458
Citations number
18
Categorie Soggetti
Chemistry
Journal title
RUSSIAN CHEMICAL BULLETIN
ISSN journal
10665285 → ACNP
Volume
48
Issue
3
Year of publication
1999
Pages
453 - 458
Database
ISI
SICI code
1066-5285(199903)48:3<453:PPAROA>2.0.ZU;2-1
Abstract
The acid-base properties and the kinetics of reactions of aminomethylated c alix[4]resorcarenes (AMC) with p-nitrophenyl eaters of phosphorus acids in aqueous solutions of propan-2-ol (80 vol.% (PrOH)-O-i) were studied by pote ntiometry, UV spectrophotometry, and P-31 NMR spectroscopy. The effect of t he length of the hydrocarbon radical and substituents at the nitrogen atom on the protolytic properties and reactivity of AMC was studied. The reactio ns studied occur in two stages. At the first stage, phosphorylated AMC are formed, which are hydrolyzed to the corresponding acids at the second stage .