KF/Al_2O_3催化合成8-氯-4-(2-氯-4-氟苯氧基)喹啉

8-氯-4-(2-氯-4-氟苯氧基)喹啉(CCFQ)是DowElanco公司开发的新颖杀菌剂,它具有独特的杀菌机理—抑制与嘧啶生物合成有关的二氢乳清酸酯脱氢酶[1],能防治对现有杀菌剂产生抗性的病原菌,与现有杀菌剂无交互抗性,并且可与多种杀菌剂复配增效.文献[2]合成条件苛刻,原料损失很大,且需色谱分离提纯,收率较低.为解决以上问题,本文以固载氟化钾为催化剂,对4,8-二氯喹啉和2-氯-4-氟苯酚的缩合反应进行研究,发现催化缩合法条件温和,分离方法简单,收率可达75%.ClNCl FOHClKF/Al2O3ClNOClF主要仪器为NICOLET60SXR-FTIR红外光谱仪,KBr压…     

Excess Molar Enthalpies and Excess Molar Volumes of Binary Mixtures of Benzene and Alkanols with Quinoline

Molar excess enthalpies H _m ^E have been determined over the whole composition range for mixtures of benzene, methanol, ethanol, 1-propanol, 2-propanol and 1-butanol with quinoline at 298.15 K using a Thermometric flow calorimeter. The results reflect a strong H-bond association between an alkanol and quinoline which decreases with increasing length of the alkanol chain. The small H _m ^E for (benzene+quinoline) reflects the similarity of the two molecules. This revised version was published online in August 2006 with corrections to the Cover Date.     

Synthesis and Crystal Structure of 7-Acetamido-5-chloro-8-（p-methyl- oxybenzenesulfonyloxy）-2-styrylquinoline

The title compound 7-acetamido-5-chloro-8-(p-methyloxybenzenesulfonyloxy)-2- styrylquinoline 4 (C26H21ClN2O5S, Mr = 508.96) has been synthesized and characterized by 1H- NMR, IR, ESI-MS and single-crystal X-ray diffraction techniques. The crystal belongs to orthorhombic, space group Pca21, with a = 7.920(3), b = 10.672(5), c = 28.008(12) , V = 2367.3(17) 3, Z = 4, Dc = 1.425 g/cm3, μ = 0.290 mm-1, F(000) = 1056, R = 0.0323 and wR = 0.0692 for 3895 unique reflections with 3127 observed ones (I > 2σ(I)). X-ray analysis reveals that the styrylquinoline subunit adopts a coplanar conformation, where the benzene ring and quinoline are in trans configuration.     

Effect of Quinoline on the Phospholipid Profile of Curvularia lunata and Its Microbial Detoxification

Quinoline is an N-heterocyclic compound commonly found in wastewater, especially that derived from coal processing, chemical, and pharmaceutical industries. In the present study, the microscopic fungus Curvularia lunata IM 4417, which is known to degrade various xenobiotics, was used. The aim of the research was to study the elimination of quinoline and its influence on fungal phospholipids, which are considered to be excellent indicators of environmental monitoring. Quinoline biodegradation products and phospholipid contents were analyzed using gas chromatography–mass spectrometry and liquid chromatography–tandem mass spectrometry. C. lunata IM 4417 degraded quinoline, which led to the formation of conjugates of glucose with hydroxylated derivatives of the compound. Toxicity tests (Artoxkit M and Microtox assay) indicated that the elimination of lower concentrations of quinoline was efficient and led to a reduction in sample toxicity. The presence of quinoline also significantly affected the profile of fatty acids and phospholipids. The addition of quinoline to a culture of C. lunata IM 4417 caused an increase in the content of phosphatidylcholine (PC) and a decrease in the amount of phosphatidylethanolamine (PE), two major structural lipids. Additionally, decreases in the contents of phosphatidylinositol (PI) and phosphatidylserine (PS), which are responsible for tolerance to toxic substances, cell viability, and signal transduction, were noted. Thus, it can be concluded that the presence of quinoline modifies the membrane composition, and this change may be an important indicator of the presence of N-heterocyclic compounds or other toxins in the environment.