已合成了一系列吡啶鎓(1-10)和喹啉鎓(11-20)1,2-二苯乙烯苯磺酸盐,并通过UV-vis,FT-IR和1 H NMR光谱研究了它们的结构。另外,化合物5也通过单晶X射线衍射技术测定。已经确定了合成化合物对革兰氏阳性和革兰氏阴性细菌的抗菌活性。喹啉鎓衍生物表现出两种非常有效的特征活性,即(i)对耐甲氧西林的金黄色葡萄球菌的比活性和(ii)具有宽带光谱活性。化合物11,13和14是对革兰氏阳性菌(耐甲氧西林金黄色葡萄球菌,金黄色葡萄球菌,枯草芽孢杆菌,耐万古霉素的粪肠球菌和粪肠球菌)和革兰氏阴性细菌(志贺氏菌)表现出最广谱抗菌活性的活性。发现这些化合物的MIC优于市售消毒剂苯扎氯铵(BZK)。
Metal‐bound water molecules have recently been recognized as a new facet of soft Lewis acid catalysis. Herein, a chiral palladium aqua complex was constructed that enables carbon–hydrogen bonds of indoles to be functionalized efficiently. We embraced a chiral 2,2′‐bipyridine as both ligand and hydrogen‐bond donor to configure a robust, yet highly Lewis acidic, chiral aqua complex in water. Whereas the
New tunable pyridinium benzenesulfonate amphiphiles as anti-MRSA quaternary ammonium compounds (QACs)
作者:Kullapa Chanawanno、Pumis Thuptimdang、Suchada Chantrapromma、Hoong-Kun Fun
DOI:10.1016/j.molstruc.2022.132389
日期:2022.4
A new class of quaternaryammonium compounds (QACs) with two different spacer lengths was developed and tested for antibacterial activity. The results of the experiments revealed that compounds with a longer cinnamoyl spacer had a broad bactericidal effect against both Gram-negative and Gram-positive bacteria with substantial anti-Methicillin-Resistant Staphylococcus aureus (anti-MRSA) activity. The
Group transfers. 1. Enolate structures contributing to the transition state for nucleophilic substitution on .alpha.-substituted carbonyl compounds
作者:T. I. Yousaf、E. S. Lewis
DOI:10.1021/ja00254a038
日期:1987.9
Synthesis, structure and in vitro antibacterial activities of new hybrid disinfectants quaternary ammonium compounds: Pyridinium and quinolinium stilbene benzenesulfonates
作者:Kullapa Chanawanno、Suchada Chantrapromma、Theerasak Anantapong、Akkharawit Kanjana-Opas、Hoong-Kun Fun
DOI:10.1016/j.ejmech.2010.06.014
日期:2010.9
The series of pyridinium (1–10) and quinolinium (11–20) stilbene benzenesulfonates have been synthesized and their structures were investigated by UV–vis, FT-IR and 1H NMR spectroscopy. In addition, compound 5 was also determined by single crystal X-ray diffraction technique. The antibacterial activity of the synthesized compounds against both Gram-positive and Gram-negative bacteria has been determined
已合成了一系列吡啶鎓(1-10)和喹啉鎓(11-20)1,2-二苯乙烯苯磺酸盐,并通过UV-vis,FT-IR和1 H NMR光谱研究了它们的结构。另外,化合物5也通过单晶X射线衍射技术测定。已经确定了合成化合物对革兰氏阳性和革兰氏阴性细菌的抗菌活性。喹啉鎓衍生物表现出两种非常有效的特征活性,即(i)对耐甲氧西林的金黄色葡萄球菌的比活性和(ii)具有宽带光谱活性。化合物11,13和14是对革兰氏阳性菌(耐甲氧西林金黄色葡萄球菌,金黄色葡萄球菌,枯草芽孢杆菌,耐万古霉素的粪肠球菌和粪肠球菌)和革兰氏阴性细菌(志贺氏菌)表现出最广谱抗菌活性的活性。发现这些化合物的MIC优于市售消毒剂苯扎氯铵(BZK)。
Chiral NHC Ligands for Enantioselective Gold(I) Catalysis Under Aerobic Conditions: the Importance of Conformational Flexibility and Steric Hindrance of NHC Ligand on Reactivity
of chiral NHC−Au−Cl complexes, bearing sterically encumbered NHC ligands, has been accessed by merging anilines with commercially available chiral aminoalcohols and amines. Evaluation of the catalytic activity in enantioselective allenol cyclization has pointed out the importance of the steric hindrance and conformationalflexibility of the NHC core for reactivity. Ion metathesis between NHC−Au−Cl