[EN] HETEROAROMATIC RING TRIDENTATE PYRIDINE IMINE IRON COMPLEX, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF IN CATALYSIS OF CONJUGATED DIENE POLYMERIZATION<br/>[FR] COMPLEXE DE PYRIDINE IMINE FER TRIDENTATE À NOYAU AROMATIQUE À HÉTÉROATOME, PROCÉDÉ DE PRÉPARATION S'Y RAPPORTANT ET SON APPLICATION EN CATALYSE DE POLYMÉRISATION DE DIÈNES CONJUGUÉS<br/>[ZH] 一种杂芳环三齿吡啶亚胺铁配合物及其制备方法和其在催化共轭二烯聚合中的应用
Novel hemi-labile pyridyl-imine palladium complexes: Synthesis, molecular structures and reactions with ethylene
作者:William M. Motswainyana、Stephen O. Ojwach、Martin O. Onani、Emmanuel I. Iwuoha、James Darkwa
DOI:10.1016/j.poly.2011.07.004
日期:2011.9
Ligands (2-pyridyl-2-furylmethyl)imine, (L1), (2-pyridyl-2-thiophenemethyl)imine (12), and (2-pyridyl-2-thiopheneethyl)imine (L3) were synthesized by condensation reactions and obtained in good yields. Reactions of L1-L3 with either [PdClMe(cod)] or [PdCl2(cod)] gave the corresponding monometallic palladium(II) complexes 1-5 in very good yields. Molecular structures of complexes 1,4 and 5 indicated that the ligands are bidentate and coordinate to the palladium metal through the imine and pyridine nitrogen atoms. When complexes 3-5 were treated with NaBAr4, cationic species, 3a, 4a, and 5a were produced which catalyzed polymerization of ethylene though with very low activities. H-1 NMR spectroscopy studies showed that these cationic species were very stable in solution. DFT calculations showed high ethylene coordination barriers to the cationic species 3a, 4a and 5a. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of Pyrido[1,2-<i>a</i>]indole Malonates and Amines through Aryne Annulation
作者:Donald C. Rogness、Nataliya A. Markina、Jesse P. Waldo、Richard C. Larock
DOI:10.1021/jo2025543
日期:2012.3.16
compounds, but there is a lack of efficient methods for their synthesis. We report a convenient and efficient route to these privileged structures starting from easily accessible 2-substituted pyridines and aryne precursors. A small library of compounds has been synthesized utilizing the developed method, affording variouslysubstituted pyrido[1,2-a]indoles in moderate to good yields.
吡啶并[1,2- a ]吲哚被认为是医学上和药学上重要的化合物,但缺乏有效的合成方法。我们报告了从容易获得的 2-取代吡啶和芳炔前体开始的一种方便有效的途径来获得这些特权结构。使用开发的方法合成了一个小型化合物库,以中等至良好的产率提供各种取代的吡啶并[1,2- a ]吲哚。
New imino-pyridyl nickel(II) complexes: Synthesis, molecular structures and application as Heck coupling catalysts
作者:William M. Motswainyana、Martin O. Onani、Stephen O. Ojwach、Bernard Omondi
DOI:10.1016/j.ica.2012.04.037
日期:2012.8
Reactions of imino-pyridyl ligands, (2-pyridyl-2-thiophenemethyl)imine (L1) and (2-pyridyl-2-thiopheneethyl)imine (L2) with NiBr2(DME) gave the corresponding complexes [Ni(L1)Br2] (1) and [Ni(L2)Br2] (2) in good yields. Treatment of 1 and 2 with one equivalent of 2-hydroxythiophenol resulted in the displacement of the bromide ligands to form the nickel(II) thiolato complexes 3 and 4. Molecular structure