22774-66-9Relevant academic research and scientific papers
An expedient approach to substituted triazolo[1,5-a][1,4]benzodiazepines via Cu-catalyzed tandem Ullmann C-N coupling/azide-alkyne cycloaddition
Majumdar,Ganai, Sintu
, p. 6192 - 6195 (2013)
An approach to the synthesis of triazolo[1,5-a][1,4]benzodiazepines comprising copper catalyzed tandem Ullmann C-N coupling followed by azide-alkyne cycloaddition has been described. The reaction of o-azidobenzylbromide and N-propargylated aniline derivat
Compound of dipyrrolopyridine structure Preparation method and medical application
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Paragraph 0254-0257, (2021/08/25)
The invention discloses a compound with a dipyrrolo-pyridine structure as well as a preparation method and medical application thereof. The compound provided by the invention has obvious inhibitory activity on JAK family proteins, is an effective JAK inhibitor, and has the prospect of being developed into drugs for inhibiting JAK and further treating diseases.
One-pot, two-step synthesis of 7-methylene-1,5-piperazine-fused 1,2,3-triazoles
Kuang, Lu,Ming, Peng,Wan, Chang-Feng,Chen, Jun-Min,Sheng, Shou-Ri
, p. 563 - 569 (2020/11/19)
A facile, one-pot two-step synthesis of 7-methylene-1,5-piperazine-fused 1,2,3-triazole derivatives has been developed. The protocol employs an N-allylation of N-propargylated amines with 2,3-dibromopropene in the presence of K2CO3 in DMSO and a CuI-catalyzed [3 + 2] cycloaddition reaction of the synthetic N-(2-bromoallyl)-N-propargyl amines with sodium azide sequentially. Such a method provides methylene-substituted 1,2,3-triazole fused piperazines with some advantages such as simple operation, high efficiency and good product yield (80–91%) through readily available starting materials.
Synthesis and biological evaluation of coumarin-linked 4-anilinomethyl-1,2,3-triazoles as potent inhibitors of carbonic anhydrases ix and xiii involved in tumorigenesis
Thacker, Pavitra S.,Tiwari, Prerna L.,Angeli, Andrea,Srikanth, Danaboina,Swain, Baijayantimala,Arifuddin, Mohammed,Supuran, Claudiu T.
, (2021/04/22)
A series of coumarin-linked 4-anilinomethyl-1,2,3-triazoles (6a–t) was synthesized via a molecular hybridization approach, through carbon C-6 of the coumarin moiety. The synthesized compounds were evaluated for their inhibition of carbonic anhydrase (CA)
Zinc(ii)-catalyzed intramolecular hydroarylation-redox cross-dehydrogenative coupling of N -propargylanilines with diverse carbon pronucleophiles: Facile access to functionalized tetrahydroquinolines
Li, Guangzhe,Wang, Chengdong,Li, Yueqing,Shao, Kun,Yu, Guo,Wang, Shisheng,Guo, Xiuhan,Zhao, Weijie,Nakamura, Hiroyuki
supporting information, p. 7333 - 7336 (2020/07/23)
Zinc(ii)-catalyzed intramolecular hydroarylation-redox cross-dehydrogenative coupling of N-propargylanilines with two types of carbon pronucleophiles (nitromethane as a sp3 carbon pronucleophile and phenylacetylenes as sp carbon pronucleophiles) proceeded to give the 2-substituted tetrahydroquinolines in good yields with 100percent atomic utilization without any additional external oxidants.
Nucleophilic aromatic substitution of unactivated fluoroarenes enabled by organic photoredox catalysis
Nicewicz, David A.,Pistritto, Vincent A.,Schutzbach-Horton, Megan E.
supporting information, p. 17187 - 17194 (2020/11/02)
Nucleophilic aromatic substitution (SNAr) is a classical reaction with well-known reactivity toward electron-poor fluoroarenes. However, electron-neutral and electron-rich fluoro(hetero)arenes are considerably underrepresented. Herein, we present a method for the nucleophilic defluorination of unactivated fluoroarenes enabled by cation radical-accelerated nucleophilic aromatic substitution. The use of organic photoredox catalysis renders this method operationally simple under mild conditions and is amenable to various nucleophile classes, including azoles, amines, and carboxylic acids. Select fluorinated heterocycles can be functionalized using this method. In addition, the late-stage functionalization of pharmaceuticals is also presented. Computational studies demonstrate that the site selectivity of the reaction is dictated by arene electronics.
Discovery of a novel series of hDHODH inhibitors with anti-pulmonary fibrotic activities
Lu, Kuan,Zhao, Yanfang,Wu, Guodong,Hu, Hao,Wang, Mingzhong,Gong, Guowei,Jiang, Yuyang
, p. 44 - 51 (2019/01/28)
Human dihydroorotate dehydrogenase (hDHODH) is a flavin-dependent enzyme essential to pyrimidine de novo biosynthesis, which serves as an attractive therapeutic target for the treatment of autoimmune disorders. A novel series of hDHODH inhibitors was deve
An Efficient Metal-Free Method for the Denitrosation of Aryl N-Nitrosamines at Room Temperature
Chaudhary, Priyanka,Korde, Rishi,Gupta, Surabhi,Sureshbabu, Popuri,Sabiah, Shahulhameed,Kandasamy, Jeyakumar
supporting information, p. 556 - 561 (2017/11/13)
A simple and practical method for the denitrosation of aryl N-nitrosamines to secondary amines is reported under metal-free conditions using iodine and triethylsilane. Several reduction-susceptible functional groups such as alkene, alkyne, nitrile, nitro, aldehyde, ketone and ester were found to be very stable during the denitrosation, which is remarkable. Broad substrate scope, room temperature reactions and excellent yields are the additional features of the current methodology. (Figure presented.).
Synthesis and Photophysical Characterization of 2,3-Dihydroquinolin-4-imines: New Fluorophores with Color-Tailored Emission
Chou, Chih-Hung,Rajagopal, Basker,Liang, Chien-Fu,Chen, Kuan-Lin,Jin, Dun-Yuan,Chen, Hsing-Yin,Tu, Hsiu-Chung,Shen, Yu-Ying,Lin, Po-Chiao
supporting information, p. 1112 - 1120 (2017/12/26)
In this study, a series of variously substituted 2,3-dihydroquinolin-4-imines (DQIs) were synthesized from N-substituted propargylanilines by copper(I)-catalyzed annulation. The approach adopted in this study under mild, effective conditions exhibited broad substrate tolerance, particularly for functional groups substituted on anilines. Most of the DQI derivatives synthesized under optimal conditions were obtained in good isolated yields of 63–88 %. 2,3-Dihydroquinolinimine thus obtained was easily converted to important structures like 2,3-dihydroquinolone and tetrahydrobenzodiazepin-5-one, confirming the importance of this strategy in constructing various heterocycles. Surprisingly, 2,3-dihydroquinolinimines thus obtained exhibited bright fluorescence with quantum yields up to 66 %. The density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations were performed for understanding the excited-state nature of DQI system. Accordingly, a tailored DQI derivative bearing methoxy group at C-6 position and acetoxy group at C-7 position was designed and synthesized to give emission at 559 nm with redshift compared to the 7-methoxy substituted DQI. A detailed study of DQI structures with their photophysical properties was performed with five control molecules and consequently demonstrated the uniqueness of the chemical structures of DQIs.
Stereospecific Ring Opening and Cycloisomerization of Aziridines with Propargylamines: Synthesis of Functionalized Piperazines and Tetrahydropyrazines
Das, Bijay Ketan,Pradhan, Sourav,Punniyamurthy, Tharmalingam
supporting information, p. 4444 - 4448 (2018/08/07)
Stereospecific Cu-catalyzed nucleophilic ring opening of N-sulfonylaziridines with propargylamines and subsequent hydroamination afford piperazines, which leads to double-bond isomerization to furnish tetrahydropyrazines. Optically active aziridines can be cross-coupled with high enantiomeric purities (>98% ee).
