This work describes the syntheses, crystal structures, photophysical properties, and electro‐chemical analyses of benzo[k]fluoranthene‐based linear acenes, together with ab initio density functional theory computations on them. The molecules were prepared in generally moderate to good yields through Pd‐catalyzed cycloadditions between 1,8‐diethynylnaphthalene derivatives and aryl iodides. This protocol
这项工作描述了基于苯并[ k ]荧蒽的线性并苯的合成,晶体结构,光物理性质和电化学分析,以及从头开始的密度泛函理论计算。通过在1,8-二乙炔基萘衍生物和芳基碘化物之间进行Pd催化的环加成反应,通常可以以中等到良好的产率制备这些分子。该协议比常规方法更简单,更有效。检查了该反应的范围和局限性。化合物4 hb,15 ac,17 ab,19 ac和24 je的结构通过X射线分析确定; 它们是弯曲的还是扭曲的,而不是平面的。还研究了这些环加合物的光物理和电化学性质,并将其与基于密度泛函理论的计算预测进行了比较。
Nickel-Catalyzed, Cascade Cycloadditions of 1-Ethynyl-8-halonaphthalenes with Nitriles: Synthesis, Structure, and Physical Properties of New Pyrroloarenes
The reaction of 1‐ethynyl‐8‐halonaphthalenes 1 with nitriles in the presence of the catalytic system [NiBr2(dppe)]/Zn (dppe=1,2‐bis(diphenylphosphino)ethane) is found to produce unusual pyrroloarenes 2. The carbon–nitrogentriplebond in nitrile is activated twice, and five new bonds are formed in a one‐pot transformation, which causes a pyrrole and two six‐membered rings to be generated simultaneously
Zethrenes were synthesized by Pd‐catalyzed cyclodimerization of 1‐ethynyl‐8‐iodonaphthalenes. The structure of these cycloadducts was confirmed by X‐ray crystal analysis. The bond lengths and bond alternation in the crystal structures reveal that the central two six‐membered rings of the title compounds lack aromaticity.
of the main research interests of our group has been the construction of 6/5 π-systems through the regioselective conversion of parallel alkynes in naphthalene with the aim of exploiting potential fluorescent materials. Herein, the copper-catalyzed synthesis of polysubstituted (Z)-2H-naphtho[1,8-bc]thiophenes from 8-halo-1-ethynylnaphthalenes using potassium ethylxanthate as the sulfur source is reported
近年来,我们小组的主要研究兴趣之一是通过平行炔烃在萘中的区域选择性转化来构建6/5π系统,目的是开发潜在的荧光材料。在此,报道了使用乙基黄原酸钾作为硫源,由8-卤-1-乙炔基萘经铜催化合成多取代的(Z)-2 H-萘[1,8- bc ]噻吩。在该方案中,通过铜催化的Ullmann型C(芳基)–S键形成和炔键的α加成反应,以高选择性和高收率合成了一系列噻吩稠合的6/5π系统化合物。合成的多取代(Z)-2 H-萘[1,8- bc ]噻吩表现出固体发射,这使其成为光电共轭材料的潜在候选者。通过使用DMSO / D 2 O(3:1)作为反应溶剂,可以在标准条件下以良好的收率获得氘代产物。
Synthesis of 1,2,3-Triazole-Fused Indole Derivatives via Copper-Catalyzed Cascade Reaction
作者:Fengtao Zhou、Qiuyu Zhang、Kashif Majeed、Bangjie Liu
DOI:10.1055/a-1364-9308
日期:2021.6
A copper-catalyzed tandem reaction has been developed for the synthesis of 1,2,3-triazole-fused indole derivatives. This protocol allowed us to access a wide range of 1,2,3-triazole-fused indole derivatives in moderate to excellent yields. The 1,2,3-triazole-fused indole derivatives emit blue and greenish light when excited at 365 nm. The products were further explored for their quantum efficiency