- Synthesis and characterization of Ag(I) complexes derived from new N-heterocyclic carbenes
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Two new unsymmetrical imidazolium salts viz., [1-(4-ethylphenyl)-3-propyl-1H-imidazole-3-ium bromide] (3) and [1-(2,6-dimethylphenyl)-3-propyl-1H-imidazole-3-ium bromide] (4) have been synthesized via the reaction of propyl bromide with imidazole derivati
- Hasson, Mohammed Mujbel,Al-Zaidi, Basim H.,Ismail, Ahmad H.
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p. 1149 - 1152
(2019/04/05)
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- Air-stable palladium(0) phosphine sulfide catalysts for Ullmann-type C-N and C-O coupling reactions
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This paper describes an efficient procedure for palladium(0)-catalyzed N-arylation and O-arylation of aryl halides by Ullmann-type cross coupling reaction under mild reaction conditions in a short reaction time. Two phosphine sulphide ligands and their corresponding Pd(0) complexes namely [Pd(p2S2)(dba)] and [Pd(pp3S4)(dba)], were synthesized, where p2S2 is 1,2-bis(diphenylphosphino)ethane disulfide, pp3S4 is tris[2-(diphenylphosphino)ethyl]phosphine tetrasulfide and dba is dibenzylideneacetone. Optimal reaction conditions were determined for the arylation reactions using iodobenzene and benzimidazole by varying temperature, solvent, base and catalyst loading. The cross coupling reactions were carried out taking iodobenzenes/bromobenzenes and a wide variety of substituted aryl amines/phenols/alcohols with different steric and electronic properties to afford the desired N-aryl amines/diaryl ethers/alkyl aryl ethers in good to excellent yield (70-94%).
- Majumder, Arpi,Gupta, Ragini,Mandal, Mrinmay,Babu, Madhu,Chakraborty, Debashis
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- Nano copper(i) oxide/zinc oxide catalyzed N-arylation of nitrogen-containing heterocycles with aryl halides and arylboronic acids in air
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The synergistic effect of zinc and copper in Cu2O/ZnO nanoflake as a heterogeneous catalyst for the N-arylation of heterocycles with aryl halides and arylboronic acids in the absence of additional ligand in air were demonstrated. The catalyst was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET surface area measurement, and FT-IR spectroscopy. The Royal Society of Chemistry 2014.
- Hosseini-Sarvari, Mona,Moeini, Fatemeh
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p. 7321 - 7329
(2014/02/14)
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- A new, efficient and recyclable lanthanum(III) oxide-catalyzed C-N cross-coupling
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A new and efficient protocol for the C-N cross-coupling of aryl halides with heteroaromatic amines in the presence of lanthanum(III) oxide (10 mol%) as a recyclable catalyst, N,N′-dimethylethylenediamine (DMEDA) (20 mol%) and potassium hydroxide (KOH) as a base in dimethyl sulfoxide (DMSO) at 110 °C has been developed. This inexpensive catalytic system is highly effective towards the amination of aryl halides with various nitrogen nucleophiles and is significantly tolerant towards other functional groups in the substrates. Copyright
- Murthy, S. Narayana,Madhav,Reddy, V. Prakash,Nageswar
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supporting information; experimental part
p. 3241 - 3245
(2011/02/23)
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- Recyclable heterogeneous iron catalyst for C-N cross-coupling under ligand-free conditions
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(Chemical Equation Presented) An efficient and ligand-free C-N cross-coupling of aryl halides with various heterocycles using Fe/Cg as a recyclable catalyst is reported. The yields are excellent to moderate. 2009 American Chemical Society.
- Swapna,Vijay Kumar,Prakash Reddy,Rama Rao
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supporting information; experimental part
p. 7514 - 7517
(2009/12/28)
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