Non-symmetrically p-nitrobenzyl- and p-cyanobenzyl-substituted N-heterocyclic carbene-silver(I) complexes: synthesis, characterization and antibacterial studies
摘要:
Various nitro/nitrile-functionalized benzimidazol-2-ylidene carbene complexes of silver(I) (7a-d and 11a-d) were synthesized by combination of 1-allyl/1-isopropyl/1-sec-butyl/1-isopentyl-3-(nitro/cyano-benzyl)-3H-benzimidazol-1-ium hexafluorophosphate (6a-d and 10a-d) with silver(I) oxide in acetonitrile. The compounds were characterized by H-1, C-13 NMR, FT-IR, mass spectrometry, and elemental analysis. Additionally, the in vitro antibacterial activity of the N-heterocyclic carbene (NHC) precursors (6a-d and 10a-d) and their corresponding NHC-silver(I) complexes (7a-d and 11a-d) were investigated against Gram-positive bacteria Staphylococcus aureus and Gram-negative bacteria Escherichia coli using the qualitative Kirby-Bauer disk diffusion method. All the NHC-silver(I) complexes exhibited medium-to-high antibacterial activity with areas of clearance ranging from 12mm to 21mm, while the NHC precursors were inactive against both strains of bacteria.[GRAPHICS].
Compounds of formula (I)
and pharmaceutically acceptable salts thereof are agonists at the beta-2 adrenoceptor. They are useful as feed additives for livestock animals.
式(I)的化合物及其药用可接受的盐是β-2肾上腺素受体的激动剂。它们可用作家畜动物的饲料添加剂。
Synthesis and investigation of catalytic activity of phenylene – And biphenylene bridged bimetallic Palladium-PEPPSI complexes
作者:Fatma İmik、Sedat Yaşar、İsmail Özdemir
DOI:10.1016/j.jorganchem.2019.06.019
日期:2019.9
steric properties were used on the synthesis of bridged bimetallic NHC–Pd-PEPPSI (PEPPSI: Pyridine Enhanced Precatalyst Preparation Stabilization Initiation) complexes. The catalyticproperties of the bridged bimetallic NHC–Pd-PEPPSI complexes were investigated in the different C–C coupling reaction such as Suzuki-Miyaura reactions of arylbromides with arylboronic acid, the Heck coupling reactions of
据报道,一系列苯和联苯桥连的N-杂环卡宾(NHC)及其双金属NHC-Pd-PEPPSI配合物,并通过1 H NMR进行了全面表征,1313 C NMR,HRMS,FTIR和元素分析。具有不同电子和空间特性的N标签被用于合成桥联的双金属NHC-Pd-PEPPSI(PEPPSI:吡啶增强的前催化剂制备稳定起始)复合物。在不同的C–C偶联反应(例如芳基溴化物与芳基硼酸的Suzuki-Miyaura反应,芳基溴化物与苯乙烯的Heck偶联反应以及Sonogashira反应)中研究了桥接的双金属NHC-Pd-PEPPSI配合物的催化性能。芳基溴化物与苯乙炔。通常,所有桥接的双金属NHC-Pd-PEPPSI配合物在C-C偶联反应中均表现出良好的催化活性。
Synthesis, characterization, crystal structure and biological studies of silver(I) complexes derived from coumarin-tethered N-heterocyclic carbene ligands
作者:Gautam Achar、K. Uppendranath、V.C. Ramya、Andrea Biffis、Rangappa S. Keri、Srinivasa Budagumpi
DOI:10.1016/j.poly.2016.11.049
日期:2017.2
Corresponding bis-NHC silver complexes 16–20 were prepared in good yields by the reaction of salts 11–15 with silver(I) oxide under dark following in situ deprotonation protocol. All new compounds were characterized using spectral techniques such as 1H and 13C NMR, ATR-IR and analytical methods. Structure of the allyl-substituted silver(I) complex 16 was unequivocally established by single crystal X-ray diffraction
Compounds of general formula I
are disclosed and claimed in the present application, as well as salts and pharmaceutical compositions comprising the novel compounds and their use in therapy, in particular in the management of pain.
The present invention provides compounds of Formula (I), pharmaceutical compositions thereof, and methods of using the same in the treatment or prevention of diseases mediated by the activation of b3-adrenoceptor.