6219-55-2Relevant academic research and scientific papers
N-Heterocyclic Carbene Copper(I) Complex Catalyzed Coupling of (Hetero)aryl Chlorides and Nitrogen Heterocycles: Highly Efficient Catalytic System
Zhang, Mengyao,Zhang, Yingying,Zhang, Huixin,Zeng, Yongfei,Liu, Guiyan
, p. 1252 - 1256 (2020/08/05)
A highly efficient catalytic system for the N-arylation reactions of (hetero)aryl chlorides and nitrogen heterocycles with a copper(I) complex containing a 1,10-phenanthroline analogue N-heterocyclic carbene (NHC) has been reported. The complex was characterized by 1H NMR and 13C NMR spectroscopy and elemental analysis, and its structure was determined by single-crystal X-ray diffraction. The NHC-copper(I) complex was employed as pre-catalyst for Ullmann type N-arylation reactions of (hetero)aryl chlorides with various azoles. A variety of hindered and functionalized azoles and (hetero)aryl chlorides were transformed in good to excellent yields.
Unique CuI-pyridine based ligands catalytic systems for N-arylation of indoles and other heterocycles
Taywade, Amol,Chavan, Snehal,Ulhe, Avinash,Berad, Baliram
supporting information, p. 1443 - 1453 (2018/06/01)
Two pyridine-based ligands (N-((pyridin-2-yl) methyl) pyridin-2-amine) L1 and (N-((pyridin-2-yl) methylene) pyridin-2-amine) L2 are explored in present work which are inexpensive, effective and environmentally benign in their properties. These have been utilized for C-N cross coupling reaction resulting in N-arylation. The N-arylation of indole, imidazole and triazole have been successfully carried out with different aryl and heteroaryl halides using these ligands.
Copper nanoparticles incorporated on a mesoporous carbon nitride, an excellent catalyst in the Huisgen 1,3-dipolar cycloaddition and N-arylation of N-heterocycles
Kazemi Movahed, Siyavash,Salari, Parinaz,Kasmaei, Melika,Armaghan, Mahsa,Dabiri, Minoo,Amini, Mostafa M.
, (2017/10/06)
Cu nanoparticles with average particles size around 10?nm were incorporated on the surface of a mesoporous carbon nitride support. The XRD and N2 adsorption isotherms show that it maintains a hexagonal mesoporous structure with a high surface a
Efficient and recyclable copper-based MOF-catalyzed N-arylation of N-containing heterocycles with aryliodides
Li, Zihao,Meng, Fei,Zhang, Jie,Xie, Jianwei,Dai, Bin
supporting information, p. 10861 - 10865 (2016/12/06)
Copper-based MOF-199 was used as an efficient heterogeneous catalyst to catalyze cross-coupling reactions between N-containing heterocycles and aryliodides with high yields. The catalyst can be easily separated from the reaction mixture, and can be reused at least 5 times without significantly decreasing the activity. The XRD results showed that the crystallinity and structure of MOF-199 can be maintained well during the coupling reaction.
HEPARAN SULFATE BIOSYNTHESIS INHIBITORS FOR THE TREATMENT OF DISEASES
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Paragraph 000498, (2016/05/02)
Described herein are compounds of Formula I, methods of making such compounds, pharmaceutical compositions and medicaments containing such compounds, and methods of using such compounds to treat or prevent diseases or conditions in need of inhibition of heparan sulfate biosynthesis.
IMINOSUGARS USEFUL FOR THE TREATMENT OF VIRAL DISEASES
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Page/Page column 61, (2016/06/01)
Formula IA, ad their use for treating viral infections.
Heterogeneous sequential N-arylation of N-heterocycles over copper anchored mesoporous silica catalyst
Das, Soma,Maity, Tanmoy,Koner, Subratanath
, p. 53 - 66 (2016/01/12)
N-Arylation reaction of N-heterocyclic compounds has been carried out in excellent yield using copper anchored SBA-15 catalyst. Sequential N-arylation reactions employing single catalyst under heterogeneous condition provides a straightforward access to a
Cu(0)@Al2O3/SiO2 NPs: An efficient reusable catalyst for the cross coupling reactions of aryl chlorides with amines and anilines
Reddy, P. Linga,Arundhathi,Rawat, Diwan S.
, p. 92121 - 92127 (2015/11/17)
The C-N cross coupling reaction of aryl chlorides with various alkyl/aryl amines catalyzed by copper nanoparticles impregnated on alumina/silica support (Cu(0)@Al2O3/SiO2) was investigated. The prepared catalyst was characterized for its intrinsic physico-chemical and textural properties using XRD, XPS, HR-TEM, BET surface area, SEM-EDAX, H2-TPR and ICP-AES techniques. The catalyst exhibits excellent reactivity and efficacy in the cross-coupling of a wide range of alkyl/aryl amines including challenging anilines with aryl chlorides. The catalyst offers significant advantages such as brevity, milder reaction conditions, excellent yields and high functional group tolerance for C-N cross coupling when compared with the other reported methods. Moreover, this atom-economical methodology does not require an additional ligand or co-catalyst/activator. The Cu(0)@Al2O3/SiO2 catalyst was efficiently applied to a gram scale synthesis of 7-chloro-4-(4-(2-nitrophenyl)piperazin-1-yl)quinolone (2k). The robustness of the catalyst was examined by reusing it for five consecutive runs.
Tamarix gallica leaf extract mediated novel route for green synthesis of CuO nanoparticles and their application for N-arylation of nitrogen-containing heterocycles under ligand-free conditions
Nasrollahzadeh, Mahmoud,Sajadi, S. Mohammad,Maham, Mehdi
, p. 40628 - 40635 (2015/05/20)
We report the green synthesis of CuO nanoparticles (CuO NPs) using Tamarix gallica leaf extract and their catalytic activity for N-arylation of nitrogen-containing heterocycles with aryl halides under ligand-free conditions. Tamarix gallica leaves are used as a bio-material for the first time as reducing agent. The green synthesized CuO NPs was characterized using the powder XRD, TEM, UV-vis and FT-IR. This method offers several advantages, viz. high yields, simple methodology, recyclability of the catalyst and a simple workup procedure.
Catalytic activity and antibacterial properties of nanopolymer-supported copper complex for C-N coupling reactions of amines and nitrogen-containing heterocycles with aryl halides
Nasrollahzadeh, Mahmoud,Zahraei, Ali,Pourbasheer, Eslam
, p. 1329 - 1334 (2015/08/18)
This paper reports on the antibacterial properties and application of nanopolymer-supported copper complex for the ligand-free C-N coupling reactions of amines and nitrogen-containing heterocycles with aryl halides. This method has the advantages of high yields, simple methodology, and easy workup. The catalyst can be recovered by simple filtration from the reaction mixture and reused several times without significant loss of catalytic activity.
