The Use of Benzamide Derivatives of Secondary Amines for Stereochemical Studies by Circular Dichroism
作者:Jacek Gawroński、Halina Kołbon、Marcin Kwit
DOI:10.1080/10242430212196
日期:2002.3
The benzamide chromophore is widely used as a Cottonogenic derivative of primary amines for stereochemical studies by circular dichroism. The assignments based on the exciton chirality method are reliable since the benzamide group has well-defined geometry and conformation. A recent report (J.D. Chisholm, J. Golik, B. Krishnan, J.A. Matson, D.L. Van Vranken, J. Am. Chem. Soc. 1999, 121: 3801-3802)
苯甲酰胺发色团广泛用作伯胺的产棉衍生物,用于通过圆二色性进行立体化学研究。由于苯甲酰胺基团具有明确定义的几何构型,因此基于激子手性方法的分配是可靠的。最近的一份报告(JD Chisholm,J。Golik,B。Krishnan,JA Matson,DL Van Vranken,J。Am。Chem。Soc。1999,121:3801-3802)要求将激子手性方法应用于衍生自仲胺的苯甲酰胺。通过使用已知绝对构型的氨基醇(1-4)和二胺(5、6)的苯甲酰基衍生物,我们证明了由于仲和叔苯甲酰胺引起的250-210 nm范围激子棉花效应通常相反。如半经验分子模型和NMR数据所示,这种差异的根源可追溯到仲,叔苯甲酰胺中酰胺CN键的不同构象平衡。由于叔苯甲酰胺的激子偶合,该特征可用于通过分析CD光谱确定绝对构型。
Toward overcoming cisplatin resistance via sterically hindered platinum(II) complexes
number of platinum(II) complexes with steric hindrance derived from (1R,2R)-N1-benzylcyclohexane-1,2-diamine derivatives were designed and prepared. Biological assay indicated that most complexes showed antitumor activity against the tested cancer cell lines, especially those with chloride anions as leaving groups had compatible or superior activity to cisplatin and oxaliplatin. Complex 2a, as the most
Influence of the backbone of N<sub>5</sub>-pentadentate ligands on the catalytic performance of Ni(<scp>ii</scp>) complexes for electrochemical water oxidation in neutral aqueous solutions
作者:Junyu Shen、Mei Wang、Tianhao He、Jian Jiang、Maowei Hu
DOI:10.1039/c8cc04302g
日期:——
Two N5-chelated nickel complexes displayed decent catalytic activity and good stability for electrochemical wateroxidation in phosphate buffer solutions at pH 7, with observed rate constants of 3.06 and 4.62 s−1, which are higher than those reported so far for molecular nickel catalysts in neutralsolutions. The results revealed that the rigid backbone of N5-chelating ligands has a positive influence
两种N 5螯合的镍络合物在pH 7的磷酸盐缓冲溶液中显示出良好的催化活性和电化学水氧化稳定性,观察到的速率常数为3.06和4.62 s -1,高于迄今为止报道的分子镍催化剂的速率常数。在中立的解决方案中。结果表明,N 5-螯合配体的刚性骨架对镍催化剂的活性具有积极的影响。
Synthesis and structures of copper complexes bearing unsymmetric derivatives of (
<i>R,R</i>
)‐1,2‐diaminocyclohexane: An efficient catalyst for asymmetric Henry reaction
A series of Cu (II) complexes bearing asymmetric derivatives of (R,R)‐1,2‐diaminocyclohexane were synthesised and characterised. The X‐ray structures of the complexes showed distorted square planar geometry. The catalytic activities of in situ‐generated copper acetate complexes in the presence of 10 mol% of N,N‐diisopropylethylamine were evaluated in the asymmetric Henry reaction. The current catalysts
Monofunctionalised EDTA, DTPA and TTHA derivatives and their use in
申请人:Schering Aktiengesellschaft
公开号:US06080785A1
公开(公告)日:2000-06-27
The invention relates to new monofunctionalized ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid and triethylenetetraaminehexaacetic acid derivatives, their production and their use for the production of pharmaceutical agents.