Unusual course of the p-nitrophenyl phosphate esters cleavage by 3-hydroxyiminoalkylpyridinium salts in micellar solutions

Article abstract of DOI:10.1246/cl.1998.649

Two types of amphiphilic quaternary 3-pyridinium ketoximes with different position of the hydrophobic alkyl chain were synthesized and tested as hydrolytic micellar catalysts. A considerable positive deviation from the expected first-order curve was observed in the absorbance vs time plot when p-nitrophenyl diphenyl phosphate and p-nitrophenyl diethyl phosphate were hydrolyzed in micellar solutions of the prepared ketoximes under pseudo-first-order reaction conditions.