195813-55-9Relevant academic research and scientific papers
A mixed pyridine-phenol boron complex as an organic electroluminescent material
Li,Liu,Bu,Guo,Wang
, p. 1551 - 1552 (2000)
A blue light emitting 1,6-bis(2-hydroxyphenyl)pyridine boron complex has been synthesized and used as an emitting material to fabricate electroluminescent devices.
VIVO versus VIV complex formation by tridentate (O, Narom, O) ligands: Prediction of geometry, EPR 51V hyperfine coupling constants, and UV-Vis spectra
Pisano, Luisa,Várnagy, Katalin,Timári, Sarolta,Hegetschweiler, Kaspar,Micera, Giovanni,Garribba, Eugenio
, p. 5260 - 5272 (2013)
Systems formed using the VIVO2+ ion with tridentate ligands containing a (O, Narom, O) donor set were described. Examined ligands were 3,5-bis(2-hydroxyphenyl)-1-phenyl-1H-1,2,4-triazole (H 2hyphPh),
Magnetite@MCM-41 nanoparticles as support material for Pd-N-heterocyclic carbene complex: A magnetically separable catalyst for Suzuki–Miyaura reaction
Akko?, Mitat,Bu?day, Nesrin,Alt?n, Serdar,Ya?ar, Sedat
, (2021/03/22)
The Magnetite@MCM-41@NHC@Pd catalyst was obtained with Pd metal bound to the NHC ligand anchored to the surface of Fe3O4@MCM-41. It was characterized by Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy disperse X-ray analysis (EDX), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and scanning electron microscopy (SEM). The amount of Pd in the Magnetite@MCM-41@NHC@Pd was measure by inductively coupled plasma–optical emission spectroscopy (ICP-OES) analysis. The catalytic activity of Magnetite@MCM-41@NHC@Pd heterogeneous catalyst done on Suzuki–Miyaura reactions of aryl halides with different substituted arylboronic acid derivatives. All coupling reactions afforded excellent yields and up to 408404 Turnover Frequency (TOF) h?1 in the presence of 2 mg of Magnetite@MCM-41@NHC@Pd catalyst (0.0564 mmol g?1, 0.01127 mmol% Pd) at room temperature in 2-propanol/H2O (1:2). Moreover, Magnetite@MCM-41@NHC@Pd catalyst was recover by applying the magnet and reused for another reaction. The catalyst showed excellent structural and chemical stability and reused ten times without a substantial loss in its catalytic performance.
Pd-Catalyzed Decarboxylation and Dual C(sp3)-H Functionalization Protocols for the Synthesis of 2,4-Diarylpyridines
Gujjarappa, Raghuram,Vodnala, Nagaraju,Kumar, Mohan,Malakar, Chandi C.
, p. 5005 - 5020 (2019/04/25)
The Pd-catalyzed decarboxylation and dual C(sp3)-H bond functionalization approaches have been described for the preparation of symmetrical and unsymmetrical 2,4-diarylpyridines. The developed transformations were realized using nonactivated aromatic ketones and amino acids as C-N sources. The efficacy of the catalyst and reagent combination drives the transformation toward the formation of desired products with high yields and selectivity. The described reaction conditions have seduced the self-reaction of phenylalanine via [2 + 2 + 2] cycloaddition and minimized the formation of 3,5-phenylpyridine as a side product, whereas using glycine as a C-N source, the corresponding 2,6-diarylpyridines were formed as minor products.
One-pot synthesis of symmetrical 2,6-diarylpyridines via palladium/copper-catalyzed sequential decarboxylative and direct C-H arylation
Ma, Zhiyong,Liu, Hailong,Zhang, Chunchun,Zheng, Xueli,Yuan, Maolian,Fu, Haiyan,Li, Ruixiang,Chen, Hua
supporting information, p. 1143 - 1148 (2015/04/22)
A palladium(II)/copper oxide (Cu2O)-catalyzed one-pot decarboxylative and direct C-H arylation of 2-picolinic acid with aryl bromides has been developed. Various aryl bromides have been shown to be efficient coupling partners in the presence of dimethyl sulfate, furnishing symmetrical 2,6-diarylpyridines in moderate to good yields.
Substitution of the nitro group with Grignard reagents: Facile arylation and alkenylation of pyridine N-oxides
Zhang, Fang,Zhang, Song,Duan, Xin-Fang
, p. 5618 - 5620 (2013/01/15)
The unprecedented substitution of a nitro group with aryl or alkenyl groups of Grignard reagents affords 2-aryl or alkenylpyridine N-oxides in modest to high yields with high chemoselectivity. This protocol allows a simple and clean synthesis of various 2
Electron transfer studies on Cu(II) complexes bearing phenoxy-pincer ligands
Klein, Axel,Butsch, Katharina,Neud?rfl, J?rg
experimental part, p. 3282 - 3290 (2011/02/16)
Oxido-pincer ligands with phenolate-groups [2,6-bis(2-methoxyphenyl) pyridine (LOMe2), 2,6-bis(2-hydroxyphenyl)-pyridine (LOH 2), 2,6-bis-(2,4-dimethoxyphenyl)-pyridine (LOMe4)] coordinate to CuII forming binucl
The 1,3-diaminobenzene-derived aminophosphine palladium pincer complex {C6H3[NHP(piperidinyl)2]2Pd(Cl)} - A highly active Suzuki-Miyaura catalyst with excellent functional group tolerance
Bolliger, Jeanne L.,Frech, Christian M.
experimental part, p. 1075 - 1080 (2010/06/17)
The rapidly prepared 1,3-diaminobenzenederived aminophosphine pincer complex {C6H3 [NHP(piperidinyl)2] 2Pd(Cl)} (1) is an effective Suzuki catalyst with excellent functional group tolerance. Side-product formations, such as homocoupling, debromation or protodeboration have only rarely been detected and if so, were in all cases below the 5% level. The presented reaction protocol is universally applicable. Experimental observations indicate that palladium nanoparticles are the catalytically active form of 1.
PH-responsive molecular tweezers
Leblond, Jeanne,Gao, Hui,Petitjean, Anne,Leroux, Jean-Christophe
supporting information; experimental part, p. 8544 - 8545 (2010/08/06)
Molecular tweezers are dynamic devices that are able to switch from one conformation to another upon stimulation by an external trigger. In this work, we report a new water-soluble macromolecular carrier bearing a pH-responsive molecular tweezer, whose affinity for a substrate depends on the external pH. The conformational change of the switching unit was evidenced by 1H NMR spectroscopy, and fluorescence studies conducted in aqueous media demonstrated the ability of the carrier to bind to substrates in a pH-dependent fashion.
Suzuki coupling of heteroaromatic chlorides using highly electron-donating clickphos ligands
Spinella, Stephen M.,Guan, Zheng-Hui,Chen, Jian,Zhang, Xumu
experimental part, p. 3094 - 3098 (2009/12/28)
Using highly electron-rich monophosphine ligands, Suzuki cross-coupling of heteroaromatic chlorides with various boronic acids was carried out in high yields. High yields were also often observed when steric heteroaromatic chlorides were employed in Suzuki cross-coupling reactions.
