Copper-catalyzed direct alkylation of 1,3-azoles with N-tosylhydrazones bearing a ferrocenyl group: a novel method for the synthesis of ferrocenyl-based ligands
Copper-catalyzed cross-coupling of ferrocenyl ketone-derived N-tosylhydrazones with benzo[d]oxazole leads to the direct C–H bond functionalization by a secondary ferrocenyl alkylgroup. This direct C–H bond alkylation of azoles with N-tosylhydrazonesbearing a ferrocenyl group uses inexpensive CuBr as the catalyst without any ligand. The reaction is operationally simple and conducted under mild conditions
铜催化的二茂铁基酮衍生的N-甲苯磺酰hydr与苯并[ d ]恶唑的交叉偶联通过仲二茂铁基烷基直接导致C–H键官能化。唑与带有二茂铁基的N-甲苯磺酰hydr的直接C–H键烷基化反应使用廉价的CuBr作为催化剂,而没有任何配体。该反应操作简单并且在温和的条件下进行,以中等至良好的产率得到相应的基于二茂铁基的配体。此外,它们能够充当双齿配体,产生相应的钯螯合复合物6a-6c,该复合物是通过5a-5c与[PdCl 2(MeCN)2]。
Synthesis of Ferrocenyl-Based Unsymmetrical Azines via a Simple Reaction of Aldehydes with Ketone-Derived <i>N</i>-Tosyl Hydrazones and the Evaluation of the Extent of Conjugation in the Molecule
We have designed and synthesized 1-substituted and 1,1′-disubstituted ferrocene-based unsymmetrical azines under metal-free conditions. The crystal structures of 3k, 5i, and 5g revealed that conjugative interactions between the ferrocene phenyl rings and the entire azine fragment exist. Furthermore, our electrochemical and optical analysis provided support for extended conjugation, which suggested
One-pot synthesis of ferrocenyl dithiocarbamates and their application in the detection of Cu<sup>2+</sup>
作者:Junyang Dong、Jianfeng Hu、Hao Zhang
DOI:10.1039/d2nj04133b
日期:——
Synthesis of ferrocenyl dithiocarbamate derivatives: coupling of dithiocarbamate and N-tosylhydrazone under green conditions and application for recognition of Cu2+.
Ferrocene containing N-tosyl hydrazones as optical and electrochemical sensors for Hg2+, Cu2+ and F− ions
作者:Li Ling、Jianfeng Hu、Hao Zhang
DOI:10.1016/j.tet.2019.03.023
日期:2019.4
Ferrocene containing N-tosyl hydrazones as selective and sensitive optical and electrochemical chemosensors were synthesized and characterized by H-1 NMR, C-13 NMR, ESI-MS and X-ray analysis. The cation and anion binding studies were carried out using various techniques including electrochemistry, UV-vis and H-1 NMR spectroscopy. Chemosensors 2a and 2b have shown excellent selective recognition toward Hg2+, Cu2+ and F- through optical and electrochemical signals. The color of 2a and 2b in solution changed visibly from pale yellow to red upon addition of Hg(2+)ion, while the color of solution changed from pale yellow to yellow green upon addition of Cu2+, which can be easily detected by the naked eye. (C) 2019 Elsevier Ltd. All rights reserved.