We synthesized 30 lipophilic bisphosphonates and tested them in malaria parasite killing (targeting parasite geranylgeranyl diphosphate synthase, GGPPS) and human gamma delta T cell activation (targeting human farnesyl diphosphate synthase, FPPS). Similar patterns of activity were seen in inhibiting human FPPS and Plasmodium GGPPS, with short to medium chain-length species having most activity. In cells, shorter chain-length species had low activity, due to poor membrane permeability, and longer chain length species were poor enzyme inhibitors. Optimal activity was thus seen with similar to C-10 side-chains, which have the best combination of enzyme inhibition and cell penetration. We also solved the crystal structure of one potent inhibitor, bound to FPPS. The results are of interest since they suggest the possibility of a combined chemo/immuno-therapeutic approach to antimalarial development in which both direct parasite killing and gamma delta T cell activation can be achieved with a single compound.
Azobenzene-Based Organic Salts with Ionic Liquid and Liquid Crystalline Properties
作者:Kathrin Stappert、Johanna Muthmann、Eike T. Spielberg、Anja-Verena Mudring
DOI:10.1021/acs.cgd.5b01024
日期:2015.9.2
carbon atoms on they form a smectic A liquid crystalline phase. The representatives of the third set with a O–C6 bridge qualify as ionicliquids with melting points less than 100 °C. However, only the representative with a hexadecyl chain forms a liquid crystalline phase. Representative single crystals for all sets of cations could be grown that allowed for single crystal structure analysis. Together
[EN] IONIC LIQUIDS BASED ON OXALIC ACID MONO ESTERS<br/>[FR] LIQUIDES IONIQUES À BASE DE MONOESTERS DE L'ACIDE OXALIQUE
申请人:BASF SE
公开号:WO2014056844A1
公开(公告)日:2014-04-17
Monosubstituted oxalic acid derivatives of the general formula (I) [A]+[O-C(O)-C(O)-O-X]-, wherein the meaning is: for [A]+, a cation made from an organic moiety A having a formally positively charged heteroatom selected from the group consisting of nitrogen, phosphorus and sulfur, X is a C1 to C30 organic residue, and wherein the following compounds (I) are disclaimed:tetramethylammonium monomethyloxalate methyltri(alkyl)ammonium monomethyloxalate trimethyl(1-hydroxyethyl)ammonium monomethyloxalate methyltriethylammonium monomethyloxalate tetraethylammonium monomethyloxalate n-propyltriethylammonium mono-n-propyloxalate n-butyltriethylammonium mono-n-butyloxalate benzyltriethylammonium monobenzyloxalate cyclohexyldimethylammonium monomethyloxalate dimethyl-phenylammonium monomethyloxalate. Tetrabutylammonium monomethyloxalate N-methylpyridinium monomethyloxalate N-ethylpyridinium monoethyloxalate N-n-propylpyridinium mono-n-propyloxalate N-n-butylpyridinium mono-n-butyl-oxalate N-benzylpyridinium monobenzyloxalate N-methyl-isochinolinium monomethyloxalate N-ethyl-isochinolinium monoethyloxalate N-n-propyl-isochinoliniummono-n-propyloxalate N-n-butyl-isochinolinium mono-n-butyloxalate N-benzyl-isochinolinium monobenzyloxalate.
Bis-<i>N</i>-heterocyclic Carbene Palladium(IV) Tetrachloride Complexes: Synthesis, Reactivity, and Mechanisms of Direct Chlorinations and Oxidations of Organic Substrates
作者:A. Scott McCall、Hongwang Wang、John M. Desper、Stefan Kraft
DOI:10.1021/ja107342b
日期:2011.2.16
the preparation and isolation of novel octahedral CH(2)-bridged bis-(N-heterocycliccarbene)palladium(IV) tetrachlorides of the general formula LPd(IV)Cl(4) [L = (NHC)CH(2)(NHC)] from LPd(II)Cl(2) and Cl(2). In intermolecular, nonchelation-controlled transformations LPd(IV)Cl(4) reacted with alkenes and alkynes to 1,2-dichlorination adducts. Aromatic, benzylic, and aliphatic C-H bonds were converted into
properties (critical micelle concentration, value of surface tension at critical micelle concentration, value of surface excess, molecular area of a single particle, and free energy of adsorption of molecule). Then, we present a SAR study for Staphylococcus aureus, as one of the most widespread pathogenic strains, conducted with the help of the Dominance‐based Rough Set Approach (DRSA), that involves
A novel photoresponsivesurfaceactiveionicliquid (SAIL) 1-(4-methyl azobenzene)-3-tetradecylimidazolium bromide ([C14mimAzo]Br) with azobenzene located in the headgroup was designed. Reversible vesicle formation and rupture can be finely controlled by photostimuli without any additives in the aqueous solution of the single-tailed ionicliquid. The photoisomerization of the azobenzene derivative
设计了一种新型的光响应性表面活性离子液体(SAIL)1-(4-甲基偶氮苯)-3-十四烷基咪唑鎓溴化物([C 14 mimAzo] Br),其中的头基带有偶氮苯。在单尾离子液体的水溶液中无需任何添加剂,就可以通过光刺激来精细地控制可逆囊泡的形成和破裂。偶氮苯衍生物的光异构化通过1 H NMR和UV-vis光谱法进行了研究。密度泛函理论(DFT)计算进一步表明,反式-[C 14 mimAzo] Br具有较少的负相互作用能,这有利于水中聚集体的形成。合并反式-偶氮苯基团增加了头基团的疏水性,并通过电荷的离域作用降低了静电排斥力,这有利于囊泡的形成。然而,顺式-偶氮苯的弯曲使得顺式异构体没有紧密聚集的能力,这引起了囊泡的破裂。我们的工作为实现可控的拓扑结构和单个SAIL的自组装铺平了方便的途径。