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

Article abstract of DOI:10.1007/BF02496160

The acid-base properties and the kinetics of reactions of aminomethylated calix[4]resorcarenes (AMC) with p-nitrophenyl esters of phosphorus acids in aqueous solutions of propan-2-ol (80 vol.% PrⁱOH) were studied by potentiometry, UV spectrophotometry, and ³¹P NMR spectroscopy. The effect of the length of the hydrocarbon radical and substituents at the nitrogen atom on the protolytic properties and reactivity of AMC was studied. The reactions studied occur in two stages. At the first stage, phosphorylated AMC are formed, which are hydrolyzed to the corresponding acids at the second stage.