Synthesis and Antimicrobial Characteristics of 4,4'-(.ALPHA.,.OMEGA.)-Polymethylenedithio)bis(1-alkylpyridinium iodide)s.
作者:Kiyo OKAZAKI、Takuya MAEDA、Hideaki NAGAMUNE、Yuki MANABE、Hiroki KOURAI
DOI:10.1248/cpb.45.1970
日期:——
Bis-quaternary ammonium compounds (bis-QACs), 4, 4'-(α, ω-polymethylenedithio)bis(1-alkylpyridinium iodide)s (4DTBP-m, n), which have 3 to 10 carbon atoms in the connecting methylene chain (m) and 8 to 18 carbon atoms of the N-alkyl chain (n), were synthesized. 4DTBP-6, 12 exhibited a wide antimicrobial spectrum against gram-positive and gram-negative bacteria and fungi. The activity was stronger than those of N-dodecylpyridinium iodide (P-12), benzyldodecyldimethylammonium chloride and 2-(4-thiazolyl)benzimidazole. The bactericidal activities of 4DTBP-m, n were scarcely affected by the lengths of the alkyl chain and methylene chain. The bis-QAC that showed the highest activity was 4DTBP-6, 8 (nimimum inhibitory concentration (MIC)=1.6 μM, minimum bactericidal concentration (MBC)=2.6 μM), and its activity was about 10 times that of N-hexadecylpyridinium iodide (P-16), which was the most active in the P-n series. In addition, 4DTBP-6, 12 showed a high bactericidal activity in the ranges of pH 5 to 8.5 and 10 to 40°C, in contrast to mono-QACs. The bis-QACs synthesized in this study have excellent bactericidal properties.
双季铵化合物(bis-QACs),4, 4'-(α, ω-聚亚甲基二硫)双(1-烷基吡啶鎓碘化物)(4DTBP-m, n),其连接的亚甲基链(m)有3至10个碳原子,N-烷基链(n)有8至18个碳原子。4DTBP-6, 12对革兰氏阳性和革兰氏阴性细菌以及真菌具有广泛的抗菌谱。其活性比N-十二烷基吡啶鎓碘化物(P-12)、苄基十二烷基二甲基氯化铵和2-(4-噻唑基)苯并咪唑更强。4DTBP-m, n的杀菌活性几乎不受烷基链和亚甲基链长度的的影响。活性最高的双季铵化合物是4DTBP-6, 8(最低抑菌浓度(MIC)=1.6 μM,最低杀菌浓度(MBC)=2.6 μM),其活性约为P-n系列中最活跃的N-十六烷基吡啶鎓碘化物(P-16)的10倍。此外,与单季铵化合物相比,4DTBP-6