222551-24-8Relevant articles and documents
The new iridium(III) pyridyltetrazolate complexes for blue phosphorescence
Lee, Hyun-Shin,Ha, Yunkyoung
, p. 67 - 75 (2009)
A series of new blue-phosphorescent iridium complexes containing phenypyridine (ppy) derivatives and pyridyltetrazole were synthesized and their photophysical and electroluminescent properties were investigated. In the complex, the phenyl moiety which is
Suzuki-Miyaura cross-coupling for efficient synthesis of aryl-substituted N-heteroarenes catalyzed by recyclable N-phenylpiperazine-Palladium(II) complex
Perumgani, Pullaiah C.,Kodicherla, Balaswamy,Mandapati, Mohan Rao,Parvathaneni, Sai Prathima
supporting information, p. 227 - 232 (2018/04/02)
Polystyrene supported N-phenylpiperazine-Pd(II) complex D was synthesized and characterized by various techniques, including Fourier transform infrared spectroscopy (FTIR), scanning electronmicroscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and thermal analysis (TG-DTA). This heterogeneous Pd(II) complex showed high catalytic efficiency for the Suzuki-Miyaura coupling of arylboronic acids with aryl bromides, aryl chlorides to give the corresponding 2-arylpyridines and heteroarenes. The coupled products were formed in excellent yields at low catalyst loadings under mild reaction conditions. Further, this heterogeneous catalyst showed excellent recyclability and reused for four cycles with no significant decrease in its activity.
α-Halo carbonyls enable: Meta selective primary, secondary and tertiary C-H alkylations by ruthenium catalysis
Paterson, Andrew J.,Heron, Callum J.,McMullin, Claire L.,Mahon, Mary F.,Press, Neil J.,Frost, Christopher G.
supporting information, p. 5993 - 6000 (2017/07/25)
A catalytic meta selective C-H alkylation of arenes is described using a wide range of α-halo carbonyls as coupling partners. Previously unreported primary alkylations with high meta selectivity have been enabled by this methodology whereas using straight chain alkyl halides affords ortho substituted products. Mechanistic analysis reveals an activation pathway whereby cyclometalation with a ruthenium(ii) complex activates the substrate molecule and is responsible for the meta selectivity observed. A distinct second activation of the coupling partner allows site selective reaction between both components.
Systematic evaluation of HOMO energy levels for efficient dye regeneration in dye-sensitized solar cells
Funaki, Takashi,Otsuka, Hiromi,Onozawa-Komatsuzaki, Nobuko,Kasuga, Kazuyuki,Sayama, Kazuhiro,Sugihara, Hideki
supporting information, p. 15945 - 15951 (2015/03/03)
Thirty ruthenium complexes of the types [Ru(tctpy)(C^N)NCS] and [Ru(tctpy)(N^O)NCS] (C^N = cyclometalating ligand and N^O = pyridinecarboxylate and its derivatives) were synthesized and evaluated to identify the highest occupied molecular orbital (HOMO) energy level (EHOMO) for efficient dye regeneration in dye-sensitized solar cells. EHOMOof these complexes was systematically tuned by changing the electron-donating ability of the C^N and N^O ligands. For complexes with an EHOMOin the potential range more negative than 0.5 V vs. a saturated calomel electrode (SCE), the incident photon-to-current conversion efficiency (IPCE) increased with a positive shift in EHOMObut could not exceed 70%, suggesting that rapid dye regeneration is difficult. On the other hand, high IPCEs above 70% were often observed for complexes with an EHOMOmore positive than 0.5 V vs. SCE. It is thus concluded that there is a threshold for efficient electron transfer near 0.5 V vs. SCE (ΔG2≈ 0.3 eV) for the series of these sensitizers. This journal is
New blue phosphorescent iridium complexes containing phenylpyridine and triazole ligands: Synthesis and luminescence studies
Ahn, So Youn,Lee, Hyun Shin,Ha, Yunkyoung
experimental part, p. 4414 - 4418 (2012/06/16)
The synthesis and luminescence of iridium(III) complexes containing new phenylpyridine (C∧N) ligands, 4-Me-4'-F-ppy, 4-Me-4'-CF3-ppy and 4-OMe-4'-CF3-ppy, were studied. These ligands were designed for development of the blue light-em
Synthesis and luminescence studies of hydrocarbon-branched tris-cyclometallated liridium (III) complexes
Lee, Hyun-Shin,Ha, Yunkyoung
experimental part, p. 60 - 67 (2011/07/09)
We synthesized the tris-cyclometallated iridium complexes containing the substituted styryl groups and their saturated analogs. As the styryl iridium complexes, Ir(F-ppy-4-CH=CHC6H4R)3 (where R=Me, NMe2, OMe) we
Discovery of 4-{4-[3-(pyridin-2-yl)-1H-pyrazol-4-yl]pyridin-2-yl}-N- (tetrahydro-2H-pyran-4-yl)benzamide (GW788388): A potent, selective, and orally active transforming growth factor-β type I receptor inhibitor
Gellibert, Fran?oise,De Gouville, Anne-Charlotte,Woolven, James,Mathews, Neil,Nguyen, Van-Loc,Bertho-Ruault, Cécile,Patikis, Angela,Grygielko, Eugene T.,Laping, Nicholas J.,Huet, Stéphane
, p. 2210 - 2221 (2007/10/03)
Inhibitors of transforming growth factor β (TGF-β) type I receptor (ALK5) offer a novel approach for the treatment of fibrotic diseases such as renal, hepatic, and pulmonary fibrosis. The optimization of a novel phenylpyridine pyrazole series (1a) led to the identification of potent, selective, and orally active ALK5 inhibitors. The cellular potency and pharmacokinetics profiles of these derivatives were improved and several compounds presented antifibrotic activity when orally administered to rats in an acute liver model of dimethylnitrosamine- (DMN-) induced expression of collagen IA1 mRNA, a major gene contributing to excessive extra cellular matrix deposit. One of the most potent ALK5 inhibitors identified in this chemical series, compound 13d (GW788388), reduced the expression of collagen IA1 by 80% at a dose of 1 mg/kg twice a day (b.i.d.). This compound significantly reduced the expression of collagen IA1 mRNA when administered orally at 10 mg/kg once a day (u.i.d.) in a model of puromycin aminonucleoside-induced renal fibrosis.
Piperazine and piperidine compounds
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, (2008/06/13)
A group of new piperazine and piperidine compounds having interesting advantageous pharmacological properties and have the formula (a) wherein A represents a heterocyclic group having 5-7 ring atoms wherein 1-3 heteroatoms selected from the group O, N and