H-Bonding Assisted Self-Assembly of Anionic and Neutral Ligand on Metal: A Comprehensive Strategy To Mimic Ditopic Ligands in Olefin Polymerization
作者:Nilesh R. Mote、Ketan Patel、Dinesh R. Shinde、Shahaji R. Gaikwad、Vijay S. Koshti、Rajesh G. Gonnade、Samir H. Chikkali
DOI:10.1021/acs.inorgchem.7b01923
日期:2017.10.16
motif, leaving no scope for self-assembly with neutral ligand. Presented here is the self-association of anionic ligand 3-ureidobenzoic acid (2a) and neutral ligand 1-(3-(diphenylphosphanyl)phenyl)urea (1a) on a metal template to yield metal complex [COOC6H4NH(CO)NH2}Ph2PC6H4NH(CO)NH2}PdMeDMSO] (4a). The identity of 4a was established by NMR and mass spectroscopy. Along the same lines, 3-(3-phenylureido)benzoic
近年来,在金属上自组装两个中性配体以模仿二齿配体配位的自组装,但是金属模板上的阴离子配体与中性配体的自组装仍然是一个难以捉摸的目标。这种自组装受到另外的复杂性的阻碍,其中高度带负电的阴离子可以与超分子基序形成分子间氢键,而没有与中性配体自组装的范围。此处介绍的是金属模板上阴离子配体3-脲基苯甲酸(2a)和中性配体1-(3-(二苯基膦基)苯基)脲(1a)的自缔合,以生成金属络合物[COOC 6 H 4 NH( CO)NH 2 } Ph 2PC 6 H 4 NH(CO)NH 2 } PdMeDMSO](4a)。通过NMR和质谱确定4a的身份。同样,3-(3-苯基脲基)苯甲酸(2b)和1-(3-(二苯基膦酰基)苯基)-3-苯基脲(1b)在金属模板上自组装以生成钯配合物[COOC 6 H 4 NH(CO)NHPh} Ph 2 PC 6 H 4 NH(CO)NHPh} PdMePy](5c)。5c的存在已通过Job
IL-8 receptor antagonists
申请人:SmithKline Beecham Corporation
公开号:US20030225125A1
公开(公告)日:2003-12-04
This invention relates to novel phenyl ureas useful in the treatment of disease states mediated by the chemokine, Interleukin-3 (IL-3)
Synthesis and evaluation of inhibitors of transthyretin amyloid formation based on the non-steroidal anti-inflammatory drug, flufenamic acid
作者:Paul W Baures、Vibha B Oza、Scott A Peterson、Jeffery W Kelly
DOI:10.1016/s0968-0896(99)00066-8
日期:1999.7
A light scattering-based amyloidfibril formation assay was employed to evaluate potential inhibitors of transthyretin (TTR) amyloidfibril formation in vitro. Twenty nine aromatic small molecules, some with homology to flufenamic acid (a known non-steroidal anti-inflammatory drug) were tested to identify important structural features for inhibitor efficacy. The results of these experiments and earlier
Towards the Discrimination of Carboxylates by Hydrogen-Bond Donor Anion Receptors
作者:Sandip A. Kadam、Kerli Martin、Kristjan Haav、Lauri Toom、Charly Mayeux、Astrid Pung、Philip A. Gale、Jennifer R. Hiscock、Simon J. Brooks、Isabelle L. Kirby、Nathalie Busschaert、Ivo Leito
DOI:10.1002/chem.201405858
日期:2015.3.23
scales (ladders) including thirty‐eight receptors were obtained with the scales anchored to indolocarbazole. The results indicate that the binding strength is largely, but not fully, determined by the strength of the primary hydrogen‐bonding interaction. The latter in turn is largely determined by the basicity of the anion. The higher is the basicity of the anion the stronger in general is the binding
测量了基于吲哚并咔唑,咔唑,吲哚,尿素和其他一些化合物的合成受体小分子的结合常数(log K ass),以及它们的组合,以测定碱性,亲水性和空间要求不同的小羧酸根阴离子,即乙酸三甲酯,乙酸盐,苯甲酸酯和乳酸酯,以0.5%H 2 O / [D 6] DMSO通过使用基于NMR的相对测量方法。结果,获得了包括38个受体的四个单独的结合亲和力量表(梯形图),并将这些量表锚定在吲哚咔唑上。结果表明,结合强度在很大程度上但不完全由氢键相互作用的强度决定。后者反过来又很大程度上取决于阴离子的碱性。阴离子的碱性越高,通常结合越强,从而导致结合强度增加的大致顺序,即乳酸<苯甲酸酯<醋酸盐≤三甲基醋酸盐,适用于所有研究的受体。然而,在许多情况下,结合顺序随羧酸根阴离子的变化而变化,有时相当大。主成分分析(PCA)表明,这主要与乙酸三甲酯的优先结合有关,这可能是由额外的疏水/疏溶剂相互作用引起的。这些发现使