1415328-91-4Relevant academic research and scientific papers
Synergistic Effect of Squaric Acid in Bromine-Catalyzed Deoxygenation of Sulfonyl Derivatives: Mechanistic Investigations and Synthetic Applications in Electrophilic (Fluoroalkyl)sulfenylation
Xiang, Haonan,Liu, Jie,Wang, Jieping,Jiang, Lvqi,Yi, Wenbin
supporting information, p. 181 - 185 (2021/12/17)
A method for electrophilic (fluoroalkyl)sulfenylation of nucleophiles by collaborative CTAB- and squaric acid-promoted deoxygenation of sulfonyl derivatives is reported. Mechanistic studies indicate that squaric acid dramatically decreased the energy barr
Aerobic Oxidative C-H Azolation of Indoles and One-Pot Synthesis of Azolyl Thioindoles by Flavin-Iodine-Coupled Organocatalysis
Tanimoto, Kazumasa,Okai, Hayaki,Oka, Marina,Ohkado, Ryoma,Iida, Hiroki
, p. 2084 - 2088 (2021/04/05)
The aerobic oxidative cross-coupling of indoles with azoles driven by flavin-iodine-coupled organocatalysis has been developed for the green synthesis of 2-(azol-1-yl)indoles. The coupled organocatalytic system enabled the one-pot three-component synthesis of 2-azolyl-3-thioindoles from indoles, azoles, and thiols in an atom-economical manner by utilizing molecular oxygen as the only sacrificial reagent.
Thioether aromatic heterocyclic compound and preparation method and application thereof
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Paragraph 0051-0054, (2021/10/05)
The invention discloses a thioether aromatic heterocyclic compound and a preparation method and application thereof, and the preparation method comprises the following steps: (I) an aromatic heterocyclic compound. The thiophenol (II) and oxidizing agent i
Triphosgene/Sodium Organosulfinate System: A General and Efficient Electrophilic Thiolation of Silylenol Ethers and Electron-Rich Heteroaromatics
Gao, Hai-Jun,Gu, Yu-Xin,Wang, Zhe-Fei,Yuan, Yan-Qin,Wang, Yan,Guo, Sheng-Rong
supporting information, p. 1838 - 1842 (2020/10/21)
An efficient and practical approach to electrophilic thiolation was developed by using commercially available triphosgene as a reductant and the appropriate alkyl- or arylsulfinates, which were transformed in situ into electrophilic RSCl intermediates in the presence of triphosgene. This procedure represents a general and powerful approach for the synthesis of α-(trifluoromethyl)thio-substituted ketones and thiolated electron-rich heteroaromatic compounds.
Photocatalytic Oxidative C-H Thiolation: Synthesis of Benzothiazoles and Sulfenylated Indoles
Aceves, Ernesto Millan,Albright, Samuel T.,Cedano, Mario R.,Dinh, Andrew N.,Gustafson, Jeffrey L.,Nguyen, Ashley D.,Smith, Diane K.
, p. 1648 - 1655 (2019/08/26)
We report studies on the photocatalytic formation of C-S bonds to form benzothiazoles via an intramolecular cyclization and sulfenylated indoles via an intermolecular reaction. Cyclic voltammetry (CV) and density functional theory studies suggest that benzothiazole formation proceeds via a mechanism that involves an electrophilic sulfur radical, while the indole sulfenylation likely proceeds via a nucleophilic sulfur radical adding into a radical cationic indole. These conditions were successfully extended to several thiobenzamides and indole substrates.
Switchable regioselection of C-H thiolation of indoles using different TMS counterions
Ji, Yuan-Zhao,Li, Hui-Jing,Zhang, Jin-Yu,Wu, Yan-Chao
supporting information, p. 11864 - 11867 (2019/10/11)
A switchable regioselectivity in C-H thiolation reaction by simply swapping the counteranions of TMS is reported here for the first time. An exclusive C3-H thiolation of indoles with sodium arylsulfinates was achieved in the presence of TMSCl as a promoter. In contrast, with the use of TMSOTf instead of TMSCl under otherwise identical conditions, a regiospecific C2-H thiolation of indoles was realized with the same set of substrates.
Mechanistic and experimental study on copper-catalyzed C3-sulfenylation of indoles with sulfur powder and aryl iodides
Ge, Xin,Cheng, Lin,Sun, Fengli,Liu, Xuemin,Chen, Xinzhi,Qian, Chao,Zhou, Shaodong
, p. 32 - 37 (2019/02/19)
The copper-catalyzed sulfenylation of indoles with aryl iodide and sulfur powder has been investigated both experimentally and theoretically. This protocol provides a direct and facile approach to prepare 3-sulfenylindoles with moderate to excellent yields and good functional-group tolerance. The in-situ IR analysis provided evidence for that NaOAc could promote the synthesis of diphenyl disulfide by the coupling of aryl iodide and sulfur powder. According to DFT calculations, the coupling pathway involving the intermediate N-methyl-3-iodoindole is more favored than the direct coupling by the C–H activation of indole. The N-methyl-3-iodoindole was identified as a crucial intermediate in the catalytic cycle.
Preparation method of 3-indole sulfide compounds
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Paragraph 0018-0036, (2019/10/23)
The invention provides a preparation method of 3-indole sulfide compounds. The method comprises the following steps: dissolving one indole compound, one sodium sulfinate compound and an accelerant into an organic solvent, performing stirring at a certain
An electrochemical synthesized by catalytic oxidation of 3 - mercapto indole compounds
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Paragraph 0091-0092, (2019/05/16)
The invention discloses a synthesizing method for a 3-mercapto indole compound through electrochemical catalytic oxidation. According to the method, a three-electrode system is used, a cathode and ananode are graphite electrodes, and a silver nitrate acetonitrile solution of 0.1mol/L is used as a reference electrode; and the indole compounds, disulfide and potassium iodide are added in a sodium tetrafluoroborate acetonitrile solution, stirring and electrolytic reaction are conducted for 3-24h under the condition of the temperature of 45-75 DEG C and 0.2-0.6 V constant voltage, a reaction solution is post-processed, and the product 3-mercapto indole compound is obtained. By means of the synthesizing method, operation is simple, convenient and safe, the yield of the product 3-mercapto indole compound is high, the reaction condition is mild, clean electrical energy is used as a redox agent, and the environmental cost is greatly reduced.
Catalyst-free sulfenylation of indoles with sulfinic esters in ethanol
Yang, Xiuqin,Bao, Yishu,Dai, Zonghao,Zhou, Qingfa,Yang, Fulai
supporting information, p. 3727 - 3731 (2018/08/21)
A novel catalyst-free method for the synthesis of structurally diverse indole thioethers in moderate to excellent yields has been developed. In this reaction, sulfinic esters serve as new sulfur electrophiles.
