合成了一系列5-硫化咪唑并[1,5- a ]吡啶-3-亚叉烯(咪唑并[1,5- a ]吡啶卡宾:IPC)及其Cu和Pd配合物。对游离卡宾和铜配合物的理论研究表明,IPC 是良好的 π 受体。特别是,5-芳基磺酰基IPC的Cu配合物是强π酸。这些配合物在 Cu 催化的内炔烃与二硼的硼氢化反应和 Mizoroki-Heck 反应中作为 π 酸性催化剂进行了测试。结果,反应性的趋势与理论考虑相符。
Application of Pd(II) Complexes with Pyridines as Catalysts for the Reduction of Aromatic Nitro Compounds by CO/H<sub>2</sub>O
作者:Agnieszka Krogul、Grzegorz Litwinienko
DOI:10.1021/acs.oprd.5b00273
日期:2015.12.18
undertaken to minimize the cost of large-scale conversion of aromatic nitro compounds to amines. Toward this end, application of CO/H2O as a reducing agent instead of molecular hydrogen seems to be a promising method, and the process can be catalyzed by Pd(II) complexes. In this work, the catalyticactivity of square planar complexes of general structure PdCl2(XnPy)2 (where XnPy = pyridine derivative) was
为了使芳香族硝基化合物大规模转化为胺的成本最小化,已经进行了许多努力。为此,使用CO / H 2 O作为还原剂代替分子氢似乎是一种有前途的方法,并且该过程可以由Pd(II)配合物催化。在这项工作中,研究了具有一般结构PdCl 2(X n Py)2(其中X n Py =吡啶衍生物)的方形平面配合物的催化活性。尤其要注意X n Py(配体)的芳环和要还原的硝基化合物(YC 6 H 4 NO 2)中取代基的作用)。在YC 6 H 4 NO 2的芳香环中引入吸电子Y会提高转化率,这表明该过程的动力学类似于在不存在水的情况下用CO羰基合成硝基苯氮烯的过程(见J. Mol 。CATAL A:化学2011,337,9-16)。令人惊讶地,吸电子取代基掺入X n Py配体的芳环中也增加了YC 6 H 4 NO 2的转化率(与YC 6 H 4 NO 2底物的结构无关)。
作者:Maxim A. Topchiy、Maria A. Zotova、Salekh M. Masoud、Artur K. Mailyan、Ivan V. Ananyev、Sergey E. Nefedov、Andrey F. Asachenko、Sergey N. Osipov
DOI:10.1002/chem.201700624
日期:2017.5.11
hydroxyl‐containing salt through a simple one‐step O‐alkylation protocol provided access to a new family of unsymmetrical fluorinated NHC precursors. These compounds were successfully utilized for the preparation of several novel metal complexes. The molecular structures of some NHC precursors and their metal complexes have been unambiguously characterized by single‐crystal X‐ray diffraction analysis. A preliminary
作者:Gregory A. Price、Andrew R. Bogdan、Ana L. Aguirre、Toshiyuki Iwai、Stevan W. Djuric、Michael G. Organ
DOI:10.1039/c6cy00331a
日期:——
Pd-PEPPSI–IPr complex prepared via azide–alkyne cycloaddition is described. The complex was immobilised onto silica gel and applied as a heterogeneouscatalyst in the Negishi reaction. The catalyst was active in both batch and continuous flow operation and was particularly effective for the coupling of heteroaryl chlorides. Long-term continuous flow experiments demonstrated good catalyst activity over
Crystal structure, electronic properties and cytotoxic activity of palladium chloride complexes with monosubstituted pyridines
作者:Agnieszka Krogul、Jakub Cedrowski、Katarzyna Wiktorska、Wojciech P. Ozimiński、Jadwiga Skupińska、Grzegorz Litwinienko
DOI:10.1039/c1dt11412c
日期:——
Palladium(II) complexes attract great attention due to their remarkable catalytic and biological activity. In the present study X-ray characterization, UV-Vis and Time-Dependent Density Functional Theory (TD-DFT) calculations for six PdCl2(XPy)2complexes (where: Py = pyridine; X = H, CH3 or Cl) were applied in order to investigate substituent effects on their crystal structures and electronic properties
PEPPSI‐Effect on Suzuki–Miyaura Reactions Using 4,5‐Dicyano‐1,3‐dimesitylimidazol‐2‐ylidene‐Palladium Complexes: A Comparison between
<i>trans</i>
‐Ligands
作者:Heiko Baier、Alexandra Kelling、Hans‐Jürgen Holdt
DOI:10.1002/ejic.201500010
日期:2015.4
Precatalyst Preparation, Stabilization and Initiation) complexes 12-15 with the structure [PdCl2(CN)(2)IMes}(3-R-py)] (12: R = H; 13: R = Cl; 14: R = Br; 15: R = CN) bearing the maleonitrile-based N-heterocyclic carbene (NHC) (CN)(2)IMes ((CN)(2)IMes}: 4,5-dicyano-1,3-dimesitylimidazol-2-ylidene) were prepared. Solid state structures of 14 and 15 were obtained. Complexes 14 and 15 adopt a slightly