6343-83-5Relevant academic research and scientific papers
Palladium Complex Immobilized on Magnetic Nanoparticles Modified with 2-Aminopyridine Ligand: A Novel and Efficient Recoverable Nanocatalyst for C–S and C–Se Coupling Reactions
Lu, Lu,Luo, Jia,Wang, Weiqi,Xu, Xiaoqing,Zhang, Jingzheng
, (2022/01/12)
A novel, versatile and efficient magnetically recoverable palladium nanocatalyst [Fe3O4@SiO2/2-aminopyridine-Pd(II)] was fabricated via the immobilization of palladium(II) complex on the surface of magnetic nanoparticles modified with 2-aminopyridine ligand. The structure of the as-fabricated Fe3O4@SiO2/2-aminopyridine-Pd(II) nanocomposite was characterized by a series of spectroscopic techniques including FT-IR, SEM, TEM, EDX, TGA, XRD, VSM and ICP-OES techniques. The Fe3O4@SiO2/2-aminopyridine-Pd(II) nanocomposite was utilized under mild and eco-friendly conditions in C–S and C–Se coupling reactions to afford a vast variety of diaryl sulfides and diaryl selenides with good to excellent yields. This heterogeneous palladium catalyst can be magnetically separated and reused for at least 7 consecutive trials without any reduction in activity. Graphical Abstract: [Figure not available: see fulltext.]
Photocatalyst-free photoredox synthesis of diaryl selenides by reaction of diselenides with aryldiazo sulfones
Jang, Jihoon,Kim, Rabin,Kim, Dae Young
supporting information, p. 720 - 726 (2020/11/30)
A photcatalyst-free photoredox synthesis of diaryl selenides has been developed by coupling reaction of diselenides with aryldiazo sulfones. The reaction was accelerated under visible light irradiation without using a photocatalyst or photosensitizer. This approach facilitates the synthesis of diaryl selendes with a wide range of functional group tolerance.
Trichloroisocyanuric Acid-Promoted Synthesis of Arylselenides and Aryltellurides from Diorganyl Dichalcogenides and Arylboronic Acids at Ambient Temperature
Sun, Nan,Zheng, Kai,Sun, Pengyuan,Chen, Yang,Jin, Liqun,Hu, Baoxiang,Shen, Zhenlu,Hu, Xinquan
, p. 3577 - 3584 (2021/06/15)
A transition-metal-free method for the synthesis of arylselenides and aryltellurides has been established based on the oxidative cross-coupling between diorganyl dichalcogenides and aryl boronic acids. With trichloroisocyanuric acid as an oxidant, the reaction proceeded smoothly to afford the desired products in 45–97% yields at ambient temperature. Three reaction reagents used in this method are stoichiometric and the oxidation by-product isocyanuric acid can be easily isolated and recovered. Besides of arylboronic acids, aryl trifluoroborates and aryl trihydroxyborates salts are also able to perform this transformation. (Figure presented.).
O-(tert-butyl) Se-phenyl selenocarbonate: A convenient, bench-stable and metal-free precursor of benzeneselenol
Temperini, Andrea,Siciliano, Carlo
, (2020/06/17)
A study by our laboratory shows that air, light and moisture stable O-(tert-butyl) Se-phenyl selenocarbonate could be employed as a safer, practical and efficient alternative to generate “in situ” benzeneselenol or benzeneselenolate anion under different and transition metal-free conditions. This procedure seems to be of general application since the nucleophilic selenium species obtained can be trapped by electrophiles such as alkyl halides, epoxides and electron-deficient alkenes and alkynes under different reaction conditions.
Metal-Free Synthesis of Unsymmetrical Aryl Selenides and Tellurides via Visible Light-Driven Activation of Arylazo Sulfones
Fagnoni, Maurizio,Li, Ankun,Li, Yuxuan,Liu, Junjie,Lu, Kui,Protti, Stefano,Shan, Xiwen,Tian, Miaomiao,Zhao, Xia
, p. 7358 - 7367 (2020/12/01)
A protocol for the visible light driven preparation of unsymmetrical (hetero)aryl selenides and tellurides is described herein. The method exploits the peculiar photoreactivity of arylazo sulfones that act as thermally stable, precursors of aryl radicals under both photocatalyst- and additive-free conditions. The method developed shows an impressive versatility (more than fifty compounds isolated).
Dechalcogenization of Aryl Dichalcogenides to Synthesize Aryl Chalcogenides via Copper Catalysis
Cao, Fei,Chen, Jinhong,Deng, Jiedan,Deng, Xuemei,Hou, Yongsheng,Shao, Xiangfeng,Shi, Tao,Wang, Yongqiang,Wang, Zhen,Wu, Lingxi,Yang, Jinru,Yang, Yuhang
, p. 2707 - 2712 (2020/03/11)
An application for dechalcogenization of aryl dichalcogenides via copper catalysis to synthesize aryl chalcogenides is disclosed. This approach is highlighted by the practical conditions, broad substrate scope, and good functional group tolerance with several sensitive groups such as aldehyde, ketone, ester, amide, cyanide, alkene, nitro, and methylsulfonyl. Furthermore, the robustness of this methodology is depicted by the late-stage modification of estrone and synthesis of vortioxetine. Remarkably, synthesis of more challenging organic materials with large ring tension under milder conditions and synthesis of some halogen contained diaryl sulfides which could not be synthesized using metal-catalyzed coupling reactions of aryl halogen are successfully accomplished with this protocol.
New arylselanylpyrazole-copper catalysts: Highly efficient catalytic system for C–Se and C–S coupling reactions
Coelho, Felipe Lange,Dresch, Lucielle Codeim,Stieler, Rafael,Campo, Leandra Franciscato,Schneider, Paulo Henrique
, p. 19 - 26 (2019/01/04)
We describe herein the use of arylselanylpyrazole–copper complexes as versatile catalysts for C–Se and C–S coupling reactions. The performance of these complexes for C–Se reactions was investigated in chalcogenoacetylene synthesis. The reactions were carried out under mild and aerobic conditions and afforded selanylalkynes bearing a variety of electron-withdrawing and electron-donating groups. The performance of these catalysts for C–S coupling was investigated through the reaction of aryl halides with thiols and products were obtained in moderate to excellent yields. A plausible mechanism for selenoacetylene synthesis is also suggested, and the 77Se NMR results show that these arylselanylpyrazole ligands act as hemilabile ligands. High-resolution mass spectrometry was used to investigate the intermediates and also to corroborate the proposed catalytic cycle.
Transition-Metal-Free Aryl-Heteroatom Bond Formation via C-S Bond Cleavage
Zhao, Jian-Nan,Kayumov, Muzaffar,Wang, Dong-Yu,Zhang, Ao
, p. 7303 - 7306 (2019/10/02)
Aryl-heteroatom bonds (C-Het) are almost ubiquitously present in chemical molecules. However, methods for diverse C-Het bond formations from a simple substrate are limited. Herein, we report a convenient and efficient C-S bond transformation of aryl sulfoniums to various C-Het bonds (C-O, C-S, C-Sn, C-Si, C-Se) in the absence of any transition-metal catalyst. These reactions proceeded in mild conditions with a wide substrate scope.
Cu-Mediated arylselenylation of aryl halides with trifluoromethyl aryl selenonium ylides
Wu, Shuai,Shi, Jin,Zhang, Cheng-Pan
, p. 7468 - 7473 (2019/08/20)
An unprecedented arylselenylation of aryl halides with trifluoromethyl aryl selenonium ylides in the presence of copper is described. The reaction proceeded at 100-140 °C under ligand- and additive-free conditions for 3-20 h to form a variety of unsymmetrical diaryl selenides in good to high yields. Arylselenylation is easy to operate, has good functional group tolerance, and demonstrates the different reaction profiles of trifluoromethyl aryl selenonium ylides from the homologous trifluoromethyl aryl sulfonium ylides.
New routes for the synthesis of unsymmetrical diarylselenides: Effect of heat, light and ultrasound
Sahani, Amber J.,Burange, Anand S.,Thakur, Seema D.,Jayaram, Radha V.
, (2019/08/06)
Herein, we report the photochemical coupling of diphenyldiselenides with substituted phenylhydrazine hydrochloride without catalyst. The protocol was developed not only in presence of sunlight and UV light but also under thermal condition for comparison study. Moreover, ultrasound assisted new catalytic protocol was developed using Ni(II)/L-proline system in DMSO with the advantage of shorter reaction time compared to earlier reports. We have also developed a new C-Se cross coupling reaction where phenylselenyl chloride and arylhydrazine hydrochlorides were effectively coupled using developed catalytic system.
