Synthesis and biological activity of phosphorylated quaternary ammonium salts

Abstract

A series of phosphorylated quaternary ammonium salts 2-7 with higher alkyl substituents at the quaternary nitrogen atom was obtained using a two-stage synthesis procedure. Compounds 2-5 were found to exhibit high antimicrobial activity against bacterial strains B. cereus , S. aureus , E. coli , as well as fungi Candida albicans . Compounds 6 and 7 containing hexa- and octadecyl substituents at the nitrogen atom are not active against pathogenic strains of microorganisms. Using the 31Р NMR method, it was proved that the compounds obtained under the action of air moisture are converted into the corresponding phosphorylated betaines.