Phosphonium salts with a dihydroxynaphthyl substituent: versatile synthesis and evaluation of antimicrobial activity

(1,4-Dihydroxynaphthalen-2-yl)phosphonium salts were obtained by reaction of P–H phosphonium salts with substituted 1,4-naphthoquinones. Some representatives of this series possess high activity against Gram-positive bacteria (Staphylococcus aureus ATCC 209p, Bacillus cereus ATCC 8035).