in many biologically active natural products and pharmacologically relevant therapeutic agents. A new series of bistetrahydroquinolines (bis-THQs) was synthesized using imino Diels-Alder reactions between dialdehydes, anilines and N-vinyl-2-pyrrolidone (NVP). The notable features of this procedure are mild reaction conditions, greater selectivity and good yields of products. In addition, the inhibitory
Synthesis and crystal structure of metal complexes based on 2,6-bis(6-methylquinolin-2-yl)pyridine ligand
作者:Y. Y. Li、X. P. Li、G. Zhang、Y. F. Wang、R. L. Zhang、J. S. Zhao
DOI:10.1134/s1070328413090030
日期:2013.9
transition metal complexes FeLCl2 (I) and MnLCl2 (II) containing tridentate 2,6-bis(6-methylquinolin-2-yl)pyridine ligand (L) have been synthesized and characterized by single-crystal X-ray crystallography. In the complexes, the metal center was tridentately chelated by ligand and further coordinated by two chlorineatoms, resulting in distorted trigonal-bipyramidal geometry for complex I and II, respectively
Copper(I)-bis(imino)pyridine-triphenylphosphine complex (2a) was prepared from the reaction of bis(imino)pyridine ligand and [Cu(PPh3)3Cl]. The tetracoordinatedcopper(I) complex was characterized by UV–Visible, NMR and elemental analysis. The molecular structure of 2a was characterized by single crystal X-ray diffraction and adopts a distorted tetrahedral geometry around the copper centre. The copper(I)
new manganese(II) complexes bearing bis(imino)pyridine pincer ligands have been synthesized. These manganese(II) complexes were characterized by UV, IR, elemental analysis studies, and X-ray crystallography. The X-ray crystal data of manganese complexes revealed distorted trigonalbipyramidal geometries around the manganese ion and neutral tridentate N^N^N coordination mode for bis(imino)pyridine (BIP)
合成了两种带有双(亚氨基)吡啶钳配体的新锰(II)配合物。这些锰 (II) 配合物通过紫外、红外、元素分析研究和 X 射线晶体学进行了表征。锰配合物的 X 射线晶体数据揭示了锰离子周围扭曲的三角双锥几何形状和双(亚氨基)吡啶(BIP)配体的中性三齿 N^N^N 配位模式。使用 TBHP 作为氧化剂,探索了锰 (II) 配合物对苄基 C−H 键的催化氧化的催化性能。相应的羰基化合物已以中等至优异的产率生产。
Stereochemistry of Phosphite Addition to Azomethine Bond of Achiral 2,6-Pyridinedicarbaldimines and Isophthalaldimines—A Comparative Study
作者:Jarosław Lewkowski、Marek Dzięgielewski
DOI:10.1080/10426507.2012.718298
日期:2013.8.1
The addition of dialkyl H-phosphonates to isophthalaldimines 1a-d and pyridine-2,6-dicarboxaldimines 2a-d was investigated and led to the corresponding aminophosphonates. Diastereoselectivity of the addition to pyridine-2,6-dicarboxaldimines was lower than to isophthalaldimines. In contrast, addition of bis(trimethylsilyl) H-phosphonate to both groups of aldimines demonstrated that the diastereoselectivity in case of pyridine-2,6-dicarboxaldimines is comparable or even better than that for the isophthalic derivatives.