27826-43-3Relevant academic research and scientific papers
Exploration of the mechanism and scope of the CuI/DABCO catalysed C–S coupling reaction
Thomas, Anns Maria,Sherin,Asha, Sujatha,Manojkumar,Anilkumar, Gopinathan
supporting information, (2019/12/26)
A cost effective and easily available CuI/DABCO catalytic system has been developed for the C–S cross-coupling reaction. This method is extremely useful for the thioetherification of aryl and heteroaryl halides, providing excellent yields and good chemoselectivity. We have also explored the mechanism of the reaction using DFT studies.
Ullmann-type: N-arylation of anilines with alkyl(aryl)sulfonium salts
Tian, Ze-Yu,Zhang, Cheng-Pan
supporting information, p. 11936 - 11939 (2019/10/11)
A palladium/copper-cocatalyzed Ullmann-type N-arylation of anilines using alkyl(aryl)sulfonium triflates as arylation reagents has been accomplished. The reaction enabled Caryl-S bond cleavage over Calkyl-S bond breakage of alkyl(aryl)sulfoniums by Pd(P(tBu)3)2/CuI and gave the corresponding N-arylated products in good to high yields. It was also significant that the reactions of aniline with asymmetric butyl(mesityl)(aryl)sulfonium triflates showed excellent selectivity, in which the aryl groups other than the bulky and electron-rich mesityl moieties were transformed.
C-S cross-coupling of aryl halides with alkyl thiols catalyzed by in-situ generated nickel(II) N-heterocyclic carbene complexes
Guo, Fang-Jie,Sun, Jing,Xu, Zhao-Qing,Kühn, Fritz E.,Zang, Shu-Liang,Zhou, Ming-Dong
, p. 11 - 14 (2017/03/24)
The C-S cross-coupling of aryl halides with alkyl thiols catalyzed by in-situ generated Ni (II) N-heterocyclic carbene (NHC) complexes is investigated. Good to excellent yields can be obtained for a variety of aryl halides when using 5 mol% of the Ni (II)-NHC catalyst and 1.5 eq. of KOtBu. Both the electronic and steric effects of the NHC ligands on the catalytic performance of Ni (II)-NHC, as well as the electronic effects of aryl halides on coupling reactivity are examined. The mechanism for Ni (II)-NHC catalyzed coupling reactions is also discussed.
A method for synthesis of aryl thioether compound
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Paragraph 0099-0102, (2016/11/28)
The invention discloses a synthetic method of an aryl thioether compound as shown in a formula (3). The polysubstituted aryl thioether compound is obtained by using aryl iodide or an aryl trifluoromethane sulphonate derivative and halogenated hydrocarbon as reaction raw materials and Na2S2O3 as a vulcanization reagent and reacting in a reaction solvent under the effect of a metal palladium catalyst. The synthetic method is mild in reaction conditions, simple in reaction operation and relatively high in productivity, can provide key skeleton structures for synthesis of lots of natural products and medicines and can be widely applied to industrialization scale production.
Iridium and phosphine promoted C-F bond activation: The C-S cross-coupling of aryl fluorides with diaryl disulfides to synthesize thioethers
Li, Liang,Miao, Hongyan,Ding, Yuqiang
supporting information, p. 6405 - 6408 (2015/11/16)
Carbon-fluorine bond is the strongest known single bond to carbon and proved very difficult to cleave. An iridium and phosphine promoted C-F bond activation was developed, for the first time achieving the C-S cross-coupling reaction of disulfides with aryl fluorides using iridium complex. The corresponding monoarylthiolation products were obtained at moderate to good yields. Thus, it represents a new method for the synthesis of aryl sulfides through C-F bond activation.
Nucleophilic Aromatic Substitution Reactions in Water Enabled by Micellar Catalysis
Isley, Nicholas A.,Linstadt, Roscoe T. H.,Kelly, Sean M.,Gallou, Fabrice,Lipshutz, Bruce H.
supporting information, p. 4734 - 4737 (2015/10/12)
Given the huge dependence on dipolar, aprotic solvents such as DMF, DMSO, DMAc, and NMP in nucleophilic aromatic substitution reactions (SNAr), a simple and environmentally friendly alternative is reported. Use of a "benign-by-design" nonionic surfactant, TPGS-750-M, in water enables nitrogen, oxygen, and sulfur nucleophiles to participate in SNAr reactions. Aromatic and heteroaromatic substrates readily participate in this micellar catalysis, which takes place at or near ambient temperatures.
An efficient iron-catalyzed S-arylation of aryl and alkylthiols with aryl halides in the presence of water under aerobic conditions
Sindhu,Thankachan, Amrutha P.,Thomas, Anns Maria,Anilkumar, Gopinathan
supporting information, p. 4923 - 4926 (2015/07/28)
Abstract In this study, an environmentally benign FeCl3·6H2O/l-proline catalytic system in the presence of TBAB was employed as a catalyst for the coupling reactions of aryl halides with aryl and alkyl thiols in water under aerobic conditions. The versatility, low cost, and environmental friendliness, in combination with high yields, makes the procedure noteworthy. This protocol offers a simple and efficient thioetherification method for aryl halides.
A general and inexpensive protocol for the Cu-catalyzed C-S cross-coupling reaction between aryl halides and thiols
Thomas, Anns Maria,Asha, Sujatha,Sindhu,Anilkumar, Gopinathan
supporting information, p. 6560 - 6564 (2015/11/09)
A cost effective and easily available CuI/DABCO catalytic system has been developed for C-S cross-coupling reaction. This method is extremely useful for the thioetherification of aryl and heteroaryl halides providing excellent yields and good chemoselectivity.
Synthesis and characterization of magnetic copper ferrite nanoparticles and their catalytic performance in one-pot odorless carbon-sulfur bond formation reactions
Gholinejad, Mohammad,Karimi, Babak,Mansouri, Fariborz
, p. 20 - 27 (2014/03/21)
In this article, we have introduced catalytic application of copper ferrite nanoparticles (CuFe2O4) for one-pot odorless production of aryl alkyl thioethers using thiourea and alkyl bromides in wet polyethylene glycol as a green solvent. The catalyst was also successfully applied for one-pot synthesis of symmetrical diaryl trithiocarbonates via the reaction of sodium sulfide, carbon disulfide and aryl iodides under heterogeneous reaction condition. Magnetic copper ferrite nanoparticles were synthesized using iron (III) chloride and copper (II) chloride, and characterized using XRD, FT-IR, AAS, and TEM analysis. The catalyst was recycled using simple magnetic separation and reused for the five consecutive runs in the reaction of iodobenzene, thiourea and benzyl bromide without appreciable loss of activity.
Direct cross-coupling access to diverse aromatic sulfide: Palladium-catalyzed double C-S bond construction using Na2S 2O3 as a sulfurating reagent
Qiao, Zongjun,Wei, Jianpeng,Jiang, Xuefeng
supporting information, p. 1212 - 1215 (2014/03/21)
The Pd-catalyzed cross-coupling of aryl halides, alkyl halides, and Na 2S2O3·5H2O to deliver aromatic thioethers is described. Pyridine, furan, thiophene, benzofuran, benzoxazole, benzothiophene, benzothiazole, and pyrazine are all amenable to this protocol. The odorless and stable solid Na2S2O 3·5H2O was used as a convenient and environmentally friendly source of sulfur. Pd-catalyzed cross-couplings without thiols or thiophenols to build C-S bonds have not previously been achieved, which renders our observation more striking.
