A new class of N-doped ionic PAHs<i>via</i>intramolecular [4+2]-cycloaddition between arylpyridines and alkynes
作者:Ravindra D. Mule、Aslam C. Shaikh、Amol B. Gade、Nitin T. Patil
DOI:10.1039/c8cc05743e
日期:——
Reported herein, for the first time, is a copper-promoted intramolecular [4+2]-cycloaddition cascade to access ionic N-doped polycyclic aromatic hydrocarbons (PAHs) with tunable emission wavelengths. It is shown that the reaction can be made catalytic with respect to Cu(OTf)2 when an external oxidant, Selectfluor, was used.
Gold-Catalyzed Cycloisomerization of Pyridine-Bridged 1,8-Diynes: An Expedient Access to Luminescent Cycl[3.2.2]azines
作者:Chetan C. Chintawar、Manoj V. Mane、Akash G. Tathe、Suprakash Biswas、Nitin T. Patil
DOI:10.1021/acs.orglett.9b02677
日期:2019.9.6
Gold-catalyzed diyne cycloisomerizations involving carbene/alkyne metathesis have been the focal point of attention for the past few years as it offers great potential to build complex polycyclic architectures. However, the design of novel cycloisomerizations has been mostly limited to 1,5/1,6- diynes and has remained very challenging to apply for higher 1,n-diynes. Herein, we disclose an unprecedented
Luminescent Platinum(II) Complexes with Bidentate Diacetylide Ligands: Structures, Photophysical Properties and Application Studies
作者:Zaoli Luo、Yungen Liu、Ka‐Chung Tong、Xiao‐Yong Chang、Wai‐Pong To、Chi‐Ming Che
DOI:10.1002/asia.202100756
日期:2021.10.4
A series of platinum(II) complexes supported by terphenyl diacetylide as well as diimine or bis-N-heterocyclic carbene (NHC) ligands have been prepared. The diacetylide ligands adopt a cis coordination mode featuring non-planar terphenyl moieties. Furthermore, the electrochemical, photophysical and photochemical properties of these platinum(II) complexes have been investigated.
已经制备了一系列由三联苯二乙炔以及二亚胺或双-N-杂环卡宾 (NHC) 配体负载的铂 (II) 配合物。二乙炔配体采用顺式配位模式,具有非平面的三联苯部分。此外,还研究了这些铂 (II) 配合物的电化学、光物理和光化学性质。
Optimizing P,N-Bidentate Ligands for Oxidative Gold Catalysis: Efficient Intermolecular Trapping of α-Oxo Gold Carbenes by Carboxylic Acids
作者:Kegong Ji、Yulong Zhao、Liming Zhang
DOI:10.1002/anie.201301601
日期:2013.6.17
Control confirmed: Optimization of P,N‐bidentateligands (L) reveals the importance of conformation control for intermolecular trapping of reactive α‐oxo gold carbene intermediates. As a result, the highly efficient and broadly applicable synthesis of carboxymethyl ketones from readily available carboxylic acids and terminal alkynes proceeds under mild reaction conditions.
控制确认:P,N-双齿配体 ( L ) 的优化揭示了构象控制对于反应性 α-氧代金卡宾中间体的分子间捕获的重要性。因此,在温和的反应条件下,可以从易得的羧酸和末端炔烃高效且广泛地合成羧甲基酮。
Ruthenium-Catalyzed Cycloisomerization of 2,2′-Diethynyl- biphenyls Involving Cleavage of a Carbon-Carbon Triple Bond
ruthenium complex catalyzes a new cycloisomerization reaction of 2,2′‐diethynylbiphenyls to form 9‐ethynylphenanthrenes, thereby cleaving the carbon–carbon triple bond of the original ethynyl group. A metal–vinylidene complex is generated from one of the two ethynyl groups, and its carbon–carbon double bond undergoes a [2+2] cycloaddition with the other ethynyl group to form a cyclobutene. The phenanthrene