4771-49-7Relevant academic research and scientific papers
Cu-Catalyzed Dimerization of Indole Derived Oxime Acetate for Synthesis of Biimidazo[1,2- a]indoles
Xie, Tao,Sui, Qi-Bang,Qin, Lu-Zhe,Wen, Xiaoan,Sun, Hongbin,Xu, Qing-Long,Zhen, Le
supporting information, p. 5518 - 5529 (2021/05/04)
A copper-mediated cyclization and dimerization of indole derived oxime acetate was developed to generate a series of biimidazo[1,2-a]indole scaffolds with two contiguous stereogenic quaternary carbons in one step.
Novel chalcone-conjugated, multi-flexible end-group coumarin thiazole hybrids as potential antibacterial repressors against methicillin-resistant Staphylococcus aureus
Hu, Yuanyuan,Hu, Chunfang,Pan, Guangxing,Yu, Congwei,Ansari, Mohammad Fawad,Yadav Bheemanaboina, Rammohan R.,Cheng, Yu,Zhou, Chenghe,Zhang, Jiaheng
, (2021/06/16)
The increasing resistance of methicillin-resistant Staphylococcus aureus (MRSA) to antibiotics has led to a growing effort to design and synthesize novel structural candidates of chalcone-conjugated, multi-flexible end-group coumarin thiazole hybrids with
Access to Polycyclic Thienoindolines via Formal [2+2+1] Cyclization of Alkynyl Indoles with S8and K2S
Ma, Jinhui,Luo, Jiajun,Jiang, Kai,Zhang, Guangwen,Liu, Shubin,Yin, Biaolin
supporting information, p. 8033 - 8038 (2021/10/25)
The syntheses of polycyclic thienoindolines bearing a dihydrothiophene or tetrahydrothiophene subunit have not been reported, despite the fact that such compounds may have interesting medicinal properties. Herein, we report a protocol for accessing polycyclic dihydrothiophenes by means of formal [2+2+1] intramolecular dearomatizing cyclization of alkynyl indoles with K2S and S8 as the sources of sulfide. In addition, tetrahydrothienoindolines were stereoselectively synthesized via a one-pot, two-step protocol involving AgNO3-catalyzed alkenyl dearomatization followed by two nucleophilic addition reactions involving K2S.
Synthesis of Pyrido[2,3-b]indole Derivatives via Rhodium-Catalyzed Cyclization of Indoles and 1-Sulfonyl-1,2,3-triazoles
An, Yuehui,Chen, Yidian,Duan, Shengguo,Li, Chuan-Ying,Xu, Ze-Feng,Xue, Bing,Zhang, Wan
supporting information, (2020/04/22)
Acyloxy-substituted α,β-unsaturated imines generated in situ from triazoles can act as aza-[4 C] synthons and be trapped by indoles in a stepwise [4 + 2] cycloaddition reaction, thus providing rapid access to valuable pyrido[2,3-b]indoles in high yields. Attractive features of this reaction system include operational simplicity, readily available substrates, construction of sterically demanding quaternary centers, and convenient derivatization using triflate. (Figure presented.).
Potassium-ion competitive acid blocker containing indole structure and preparation method and application of potassium-ion competitive acid blocker
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Paragraph 0076; 0078-0080, (2019/07/08)
The invention discloses an indole derivative or a pharmaceutically acceptable salt thereof and particularly relates to a compound containing a 1-sulfonyl-3-alkylamino methyl indole structure. The compound is shown as a formula I. The invention also discloses a preparation method of the indole derivative and application of the indole derivative in preparation of a potassium-ion competitive acid blocker or a drug for treating acid-related diseases. The preparation method has the advantages of being simple and high in yield and reproducibility.
Access to Polycyclic Sulfonyl Indolines via Fe(II)-Catalyzed or UV-Driven Formal [2 + 2 + 1] Cyclization Reactions of N-((1H-indol-3-yl)methyl)propiolamides with NaHSO3
Lu, Lin,Luo, Chenguang,Peng, Hui,Jiang, Huanfeng,Lei, Ming,Yin, Biaolin
supporting information, p. 2602 - 2605 (2019/04/30)
A variety of structurally novel polycyclic sulfonyl indolines have been synthesized via FeCl2-catalyzed or UV-driven intramolecular formal [2 + 2 + 1] dearomatizing cyclization reactions of N-(1H-indol-3-yl)methyl)propiolamides with NaHSO3 in an aqueous medium. The reactions involve the formation of one C-C bond and two C-S bonds in a single step.
Method for synthesizing indole -3 - formaldehyde compounds (by machine translation)
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Paragraph 0041-0044; 0061-0064, (2018/08/28)
The invention relates to a synthetic indole - 3 - formaldehyde compounds, which belongs to the technical field of organic synthesis. The invention will be indole compound, hexamethylene tetramine, crystalline aluminum trichloride, N, N - dimethyl formamide in proportion in 120 °C reaction under the condition of 1 - 20 the H, then filtered, washing, filtering, concentrating, column chromatography purification and other after-treatment technology, make the refined indole - 3 - formaldehyde compound. The invention overcomes the indole - 3 - benzaldehyde compound of preparation need to use not stabilized peroxide, and for a long time under the high temperature reaction of the defect. And the invention uses the advantages of simple equipment, product yield is high, the resulting yield of a target product can be up to 94%. In addition, the invention relates to a low reaction conditions, less catalyst levels, low energy consumption, the post treatment process is simple and easy to use, without the need of using a high dosage of acid or alkali, post-processing the solvent can be recovered and recycled, industrial "three wastes" is discharged little, suitable for large-scale production. (by machine translation)
Iron-Catalyzed C3-Formylation of Indoles with Formaldehyde and Aqueous Ammonia under Air
Wang, Qing-Dong,Zhou, Bin,Yang, Jin-Ming,Fang, Dong,Ren, Jiangmeng,Zeng, Bu-Bing
supporting information, p. 2670 - 2674 (2017/10/06)
An efficient iron-catalyzed C3-selective formylation of free (N-H) or N-substituted indoles was developed by employing formaldehyde and aqueous ammonia, with air as the oxidant. This new method gave 3-formylindoles in moderate to excellent yields with fairly short reaction times. Moreover, this procedure for catalytic formylation of indoles can be applied to gram-scale syntheses.
Iridium-Catalyzed Direct Regioselective C4-Amidation of Indoles under Mild Conditions
Chen, Shuyou,Feng, Boya,Zheng, Xuesong,Yin, Jiangliang,Yang, Shiping,You, Jingsong
supporting information, p. 2502 - 2505 (2017/05/24)
An efficient Ir-catalyzed amidation of indoles with sulfonyl azides is disclosed, affording diverse C4-amidated indoles exclusively under mild conditions. In this protocol, a variety of indoles with commonly occurring functional groups such as formyl, acetyl, carboxyl, amide, and ester at the C3 position are well tolerated.
Revealing the electrophilicity of: N -Ac indoles with FeCl3: A mechanistic study
Beaud, Rodolphe,Nandi, Raj Kumar,Perez-Luna, Alejandro,Guillot, Régis,Gori, Didier,Kouklovsky, Cyrille,Ghermani, Nour-Eddine,Gandon, Vincent,Vincent, Guillaume
supporting information, p. 5834 - 5837 (2017/07/11)
Herein, we report a mechanistic exploration of the unusual FeCl3-mediated hydroarylation of N-Ac indoles. Electron density topology analysis of a crystal, in situ IR monitoring, Hammett and Taft studies as well as DFT computations allowed us to determine that activation of acetyl with FeCl3 and of the C2C3 bond with a proton is involved.
