通过芳基1,2,4,3-三唑的硝化反应,合成了一系列致密而高能的聚硝基芳基1,2,4-三唑。卤代芳烃与1,2,4-三唑的Cu催化/碱介导的偶联反应提供了N-芳基1,2,4-三唑。这些新的富含硝基的芳基三唑通过分析和光谱方法进行了表征。这些化合物大多数的固态结构是通过X射线衍射分析确定的。它们的热性质通过差示扫描量热法-热重分析法确定。还计算了它们的形成热(HOF)和晶体密度。合成化合物的密度为1.40至1.85 g cm -3。这些新合成的化合物中的一些表现出高正HOF,良好的热稳定性,高密度以及合理的爆速和压力。
Aromatic N-Arylations Catalyzed by Copper-Anchored Porous Zinc-Based Metal-Organic Framework under Heterogeneous Conditions
作者:Tanmoy Maity、Debraj Saha、Subratanath Koner
DOI:10.1002/cctc.201400056
日期:2014.8
A highly porous Zn‐based metal–organicframework (MOF) IRMOF‐3 was covalently decorated with pyridine‐2‐aldehyde. The free amine group of IRMOF‐3 upon condensation with pyridine‐2‐aldehyde affords a bidentate Schiff‐base moiety in the porous matrix. The Schiff base moieties are availed to anchor copper(II) ions to display the catalyst’s utility towards catalytic reactions. The catalyst was characterized
高度多孔的锌基金属-有机骨架(MOF)IRMOF-3与吡啶-2-醛共价修饰。与吡啶-2-醛缩合后,IRMOF-3的游离胺基在多孔基质中提供双齿席夫碱部分。席夫碱部分可用于锚定铜(II)离子,以显示催化剂对催化反应的效用。通过紫外/可见光和红外光谱,粉末XRD光谱,SEM能量色散X射线光谱和氮吸附测量对催化剂进行了表征。在Cs 2 CO 3存在下,在温和条件下(90°C),该催化剂在DMSO介质中催化含氮杂环与芳基溴的N-芳基化反应具有出色的催化活性。。由于MOF的孔内存在活性位点,因此多孔催化剂表现出对底物的尺寸选择性。在多达五个连续的催化循环中,锚固的配合物似乎在催化反应过程中不会被浸出或分解,这显示出优于均相催化的实际优势。
Ligands for Copper-Catalyzed C−N Bond Forming Reactions with 1 Mol% CuBr as Catalyst
Several new ligands were designed to promote copper-catalyzed Ullman C−N coupling reactions. In this group, 8-hydroxyquinolin-N-oxide was found to serve as a superior ligand for CuBr-catalyzed coupling reactions of aryl iodides, bromides, and chlorides with aliphatic amines and N-heterocycles under a low catalyst loading (1% [Cu] mol). Reactions with the inexpensive catalytic system display a high
Ullmann C–Ncouplingreaction of nitroarenes which is achieved by using a copper containing metal–organic framework (MOF) catalyst under heterogenous conditions. The ready availability of nitroarenes and their low cost have made them ideal replacements for haloarenes as electrophilic coupling partners. Notably, the reaction protocol suppresses the by-product formation in the catalytic reaction. The catalyst
A Unified Strategy Towards<i>N</i>-Aryl Heterocycles by a One-Pot Copper-Catalyzed Oxidative C-H Amination of Azoles
作者:Parthasarathi Subramanian、Krishna P. Kaliappan
DOI:10.1002/ejoc.201402868
日期:2014.9
An efficient one-pot synthesis of N-aryl-substituted heterocycles by a Cu-catalyzed two-fold C–N bond formation is reported. This strategy involves a Cu I -catalyzed C–N bond-forming reaction between azoles and electron-deficient bromopyridines followed by an intramolecular sp 2C–Hamination. One of the products thus formed has been successfully used as a ligand for the synthesis of a Pd complex.
报道了一种通过 Cu 催化的双 C-N 键形成有效地一锅法合成 N-芳基取代的杂环的方法。该策略涉及唑类和缺电子溴吡啶之间的 Cu I 催化的 C-N 键形成反应,然后是分子内 sp 2 C-H 胺化。由此形成的产物之一已成功用作合成钯配合物的配体。
A catalytic intramolecular nitrene insertion into a copper(<scp>i</scp>)–N-heterocyclic carbene bond yielding fused nitrogen heterocycles
N-(2-azidophenyl)azolium salts were easily prepared and reacted with copper(I) in conditions allowing the formation of NHC complexes. In these conditions, the formation of benzimidazo-fused heterocycles occurred in catalytic, efficient and...