使用Cu(I)和TBTA通过微波辅助从2-叠氮吡啶和2-乙炔吡啶合成'click'衍生的1,4-二(2-吡啶基)-1,2,3-三唑(dpt)螯合剂/配体合成。通过使用常规方法以及单晶和粉末衍射分析,对微弱不对称的dpt配体与Cu(I),Pt(II),Co(II)和Ag(I)的配合物进行了结构表征。研究结果显示形成离散分子,这些离散分子通过吡啶基氮N1和近端三唑基氮N2即2-(1 H-1,2,3-三唑-4-基)吡啶或“规则的”螯合物部分,尽管存在第二个潜在的结合口袋,即2-(1 H -1,2,3-三唑-1-基)吡啶螯合或“反向”部分。通过在CD 3 CN溶液中使用1 H NMR滴定以及使用UV-Vis吸收滴定研究dpt与Cu(I)和Ag(I)的自组装,从而证实了这种结合选择性。前者显示出与该螯合物口袋相关的质子峰的增宽。
Enhanced product selectivity promoted by remote metal coordination in acceptor-free alcohol dehydrogenation catalysis
作者:Marta Valencia、Helge Müller-Bunz、Robert A. Gossage、Martin Albrecht
DOI:10.1039/c6cc00267f
日期:——
A bimetallic [Ir3+]2 complex was synthesized based on a bridging 1,2,3-triazole ligand that coordinates to one Cp*Ir unit as N,N-bidentate chelate, and to the other as a C,C-bidentate ligand.
Pyridine-phosphinimine ligand-accelerated Cu(<scp>i</scp>)-catalyzed azide–alkyne cycloaddition for preparation of 1-(pyridin-2-yl)-1,2,3-triazole derivatives
5-a]pyridines and alkynes for the first time. By optimizing the reaction conditions, an efficient catalytic system (CuCl/2-PyCH2N[double bond, length as m-dash]P(t)Bu3) was developed to give 1-(pyridin-2-yl)-1,2,3-triazole derivatives in moderate to excellent yields (46-98%).
Preparation of the Pd(II) complexes containing 2-(4-R-1,2,3-triazol-1-yl)pyridine [R = C6H5 (1), NC5H4 (2), n-C6H13 (3)] were described. Crystal structures of 1 and 2 revealed a square planar geometry with bidentateligand coordination to Pd using different N donor of the triazole ring. Catalytic studies indicated that 1–3 exhibited moderate to high activity for Suzuki–Miyaura coupling between aryl
PD的制备(II)含有2-(4- R-1,2,3-三唑-1-基)吡啶[R络合物= C 6 H ^ 5(1),NC 5 H ^ 4(2),Ñ -描述了C 6 H 13(3)]。1和2的晶体结构显示了正方形平面几何形状,使用三唑环的不同N供体使二齿配体与Pd配位。催化的研究表明,1 - 3表现出中度至轻度和需氧条件下芳基溴化物和苯基硼酸之间的Suzuki-Miyaura偶联的高活性。
Bio-inspired multinuclear copper complexes covalently immobilized on reduced graphene oxide as efficient electrocatalysts for the oxygen reduction reaction
作者:Yue-Ting Xi、Ping-Jie Wei、Ru-Chun Wang、Jin-Gang Liu
DOI:10.1039/c5cc00963d
日期:——
A bio-inspired multinuclear copper complex covalently immobilized on graphene exhibited high ORR activity and long-term stability in alkaline media.
一种仿生多核铜配合物被共价固定在石墨烯上,在碱性介质中表现出高氧还原反应活性和长期稳定性。
Triazolylidene-Iridium Complexes with a Pendant Pyridyl Group for Cooperative Metal-Ligand Induced Catalytic Dehydrogenation of Amines
作者:Marta Valencia、Ana Pereira、Helge Müller-Bunz、Tomás R. Belderraín、Pedro J. Pérez、Martin Albrecht
DOI:10.1002/chem.201700676
日期:2017.7.3
containing a C,N‐bidentate pyridyl‐triazolylidene ligand were prepared that are structurally very similar but differ in their pendant substituent. Whereas complex 1 contains a non‐coordinating pyridyl unit, complex 2 has a phenyl group on the triazolylidene substituent. The presence of the basic pyridyl unit has distinct effects on the catalytic activity of the complex in the oxidativedehydrogenation of benzylic
制备了两个含有C,N齿状吡啶基-三唑基亚基配体的铱(III)配合物,它们在结构上非常相似,但其侧基取代基不同。配合物1包含一个非配位吡啶基单元,而配合物2在三唑亚烷基取代基上具有苯基。碱性吡啶基单元的存在对配合物在苄基胺的氧化脱氢中的催化活性具有明显的影响,与仲胺相比,通常诱导更高的速率,形成更高的亚胺选择性,而不是仲胺。苯基官能化的类似物。吡啶基官能团的作用已从一组化学计量实验中阐明,该实验证明了吡啶基侧基单元与底物的胺质子之间的氢键键合。这类N-吡咯⋅⋅⋅H-N交互由X射线衍射分析,表明11 H NMR和IR光谱分析表明,底物键激活途径涉及通过路易斯酸铱中心和附加到三唑基亚配体上的路易斯碱性吡啶基位点协同的底物结合,这与配体-金属协同底物活化相一致。