899677-43-1Relevant academic research and scientific papers
Highly regioselective and stereoselective synthesis of C-Aryl glycosidesvianickel-catalyzedortho-C-H glycosylation of 8-aminoquinoline benzamides
Chen, Xi,Ding, Ya-Nan,Gou, Xue-Ya,Liang, Yong-Min,Luan, Yu-Yong,Niu, Zhi-Jie,Shi, Wei-Yu,Zhang, Zhe,Zheng, Nian
, p. 8945 - 8948 (2021/09/10)
C-Aryl glycosides are of high value as drug candidates. Here a novel and cost-effective nickel catalyzedortho-CAr-H glycosylation reaction with high regioselectivity and excellent α-selectivity is described. This method shows great functional group compatibility with various glycosides, showing its synthetic potential. Mechanistic studies indicate that C-H activation could be the rate-determining step.
C-5 selective chlorination of 8-aminoquinoline amides using dichloromethane
Lin, Xinxin,Zeng, Cuilian,Liu, Chengkou,Fang, Zheng,Guo, Kai
supporting information, p. 1352 - 1357 (2021/02/26)
An oxidant-free electrochemical regioselective chlorination of 8-aminoquinoline amides at ambient temperature in batch and continuous-flow was achieved. Inert DCM was used as the chlorinating reagent. Owing to the continuous-flow setup, the reaction scale
Metal-Free Electrochemical Oxidative Dihalogenation of Quinolines on the C5 and C7 Positions Using N-Halosuccinimides
Hou, Jiahao,Wang, Kai,Zhang, Changjun,Wei, Tingting,Bai, Renren,Xie, Yuanyuan
supporting information, p. 6382 - 6386 (2020/10/19)
An efficient and convenient method for electrochemically oxidative dichlorination or dibromination of 8-aminoquinolines on C5 and C7 positions using N-halosuccinimides (NCS and NBS) as the halogen source was described. Substrates with various functional g
Catalyst- And oxidant-free electrochemical: para -selective hydroxylation of N -arylamides in batch and continuous-flow
Chen, Meng-Yi,Fang, Zheng,Guo, Kai,Lin, Xin-Xin,Liu, Cheng-Kou
supporting information, p. 6437 - 6443 (2020/11/09)
Hydroxyl compounds serve as key building blocks in the preparation of biologically active natural products and drugs. Traditionally, hydroxylation of the aromatic ring is achieved using stoichiometric amounts of oxidants, which leads to low atom-economy, undesired by-products, potential explosion risk and environmental pollution. Recently, electrosynthesis has attracted increasing attention as it employs clean electrical energy to promote redox reactions avoiding the use of oxidants. However, due to the poor mass and heat transfers of batch cells, low productivity and selectivity limit its further application. Herein, we develop a catalyst-, oxidant-, acidic solvent- and quaternary ammonium salt-free electrochemical para-selective hydroxylation of N-arylamides at room temperature in batch and continuous-flow. This proposal features excellent position control and water, air and functional group tolerance. Also, it is easy to scale up with higher productivity and selectivity using a flow electrolysis cell.
Synthesis of diaryl sulfides through C–H bond functionalization of arylamides with cobalt salt and elemental sulfur
Li, Jian-Ye,Huang, Jun,Zhang, Shi-Jin,Yao, Chunna,Sun, Wen-Wu,Liu, Bin,Zhou, Yingbi,Wu, Bin
supporting information, p. 895 - 899 (2019/02/26)
A cobalt(II)-mediated, highly chemoselective thioarylation reaction of arylamides with elemental sulfur was reported. This reaction led to the formation of various symmetric diaryl sulfides in yields of up to 65% under mild reaction conditions. A cobalt-sulfur radical process was proposed based on preliminary results and mechanistic studies.
Electrooxidative amination of sp2 C-H bonds: Coupling of amines with aryl amides via copper catalysis
Kathiravan, Subban,Suriyanarayanan, Subramanian,Nicholls, Ian A.
, p. 1968 - 1972 (2019/03/07)
Metal-catalyzed cross-coupling reactions are among the most important transformations in organic synthesis. However, the use of C-H activation for sp2 C-N bond formation remains one of the major challenges in the field of cross-coupling chemistry. Described herein is the first example of the synergistic combination of copper catalysis and electrocatalysis for aryl C-H amination under mild reaction conditions in an atom-and step-economical manner with the liberation of H2 as the sole and benign byproduct.
Direct oxytosylation of 8-amidoquinolines by koser's reagent: An efficient strategy for 5-substituted 8-amidoquinolines
Begum, Zubeda,Bhavani,Sridhar,Reddy, Basireddy V. Subba
, p. 4089 - 4096 (2018/10/15)
A metal-free remote oxytosylation of 8-amidoquinolines has been achieved using Koser's reagent to produce 5-tosyloxy-8-amidoquinolines in good yields. This method is compatible with various functional groups present on the aromatic ring.
CoIII-Catalyzed Isonitrile Insertion/Acyl Group Migration Between C?H and N?H bonds of Arylamides
Kalsi, Deepti,Barsu, Nagaraju,Sundararaju, Basker
, p. 2360 - 2364 (2018/02/22)
A general efficient and site-selective cobalt-catalyzed insertion of isonitrile into C?H and N?H bonds of arylamides through C?H bond activation and alcohol assisted intramolecular trans-amidation is demonstrated. This straightforward approach overcomes the limitation by the presence of strongly chelating groups. Isolation of CoIII-isonitrile complex B has been achieved for the first time to understand the reaction mechanism.
C5-Regioselective C-H fluorination of 8-aminoquinoline amides and sulfonamides with Selectfluor under metal-free conditions
Zhang, Yingchao,Wen, Chunxia,Li, Jizhen
supporting information, p. 1912 - 1920 (2018/03/23)
A novel and efficient regioselective C-H fluorination of 8-aminoquinoline amides and sulfonamides at the C5 position was achieved. Using Selectfluor as a "F" reagent and HOAc as an additive, the reaction proceeds smoothly via a radical pathway. This metho
Copper-Catalyzed Selective ortho-C-H/N-H Annulation of Benzamides with Arynes: Synthesis of Phenanthridinone Alkaloids
Zhang, Ting-Yu,Lin, Jun-Bing,Li, Quan-Zhe,Kang, Jun-Chen,Pan, Jin-Long,Hou, Si-Hua,Chen, Chao,Zhang, Shu-Yu
supporting information, p. 1764 - 1767 (2017/04/11)
An efficient and convenient copper-catalyzed method has been developed to achieve direct ortho-C-H/N-H annulation to synthesize phenanthridinones with arynes. This method highlights an emerging strategy to transform inert C-H bonds into versatile functional groups in organic synthesis and provides a new way to synthesize phenanthridinone alkaloids efficiently.
