Tag: 400-500

Liu, Jinjian; Li, Jing; Lu, Wenbo published an article in 2019, the title of the article was Effect of counter cations on the photochromic behaviors of three Zn-viologen complexes.Category: pyridine-derivatives And the article contains the following content:

To determine the influence of counter cations on the photochromic properties of viologen-based compounds, with the self-assembly reaction of different viologen cations (MV2+ = 1,1′-bis(methyl)-4,4′-bipyridinium dication, EV2+ = 1,1′-bis(ethyl)-4,4′-bipyridinium dication, PV2+ = 1,1′-bis(propyl)-4,4′-bipyridinium dication), Zn2+ and H3BTC (1,3,5-benzenetricarboxylic acid), three complexes (MV)0.5[Zn(BTC)(H2O)5]·2H2O (1), (EV)0.5[Zn(BTC)(H2O)5]·H2O (2), and (PV)0.5[Zn(BTC)(H2O)5]·H2O (3) have been synthesized and structurally characterized. The photochromic behavior of the three compounds has been investigated due to the presence of electron-deficient viologen fractions. Compounds 1-3 feature similar isolated structures and all exhibit electron-transfer (ET) photochromism, which can be fine-tuned by introducing different counter cations. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Category: pyridine-derivatives

The Article related to zinc viologen complex preparation structure photochromic property, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On April 30, 2000, Hoffmann, Reinhard W.; Caturla, Francisco; Lazaro, Miguel A.; Framery, Eric; Carmen Bernabeu, M.; Valancogne, Ingrid; Montalbetti, Christian A. G. N. published an article.Formula: C23H19BrN2O4 The title of the article was Conformational analysis of 4-amido-2,4-dimethylbutyric acid derivatives. And the article contained the following:

Several protected 4-amido-2,4-dimethylbutyrates were prepared Both, syn- and anti-4-amido-2,4-dimethylbutyric acid derivatives were found to populate a conformation in which the amido group is gauche to the main chain of the mol. In the anti series, a single conformation predominates, in which the acid carbonyl group is also gauche to the main chain. In the syn series, two local conformers prevail about the C(2)-C(3) bond. The experimental process involved the reaction of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(5-bromopyridin-2-yl)propanoic acid(cas: 282734-37-6).Formula: C23H19BrN2O4

The Article related to amidomethylbutyrate preparation conformation, butyrate amido methyl preparation conformation, Amino Acids, Peptides, and Proteins: Amino Acids and other aspects.Formula: C23H19BrN2O4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On December 7, 2003, Tabanella, Stefania; Valancogne, Ingrid; Jackson, Richard F. W. published an article.Application In Synthesis of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(5-bromopyridin-2-yl)propanoic acid The title of the article was Preparation of enantiomerically pure pyridyl amino acids from serine. And the article contained the following:

A range of substituted pyridyl amino acids have been prepared by palladium catalyzed cross-coupling of serine-derived organozinc reagents with differently substituted halopyridines. Following this procedure a DMAP analog has been synthesized and used as a building block in the preparation of two related tripeptides, which have been tested as catalysts in the kinetic resolution of trans-2-(N-acetylamino)cyclohexan-1-ol, resulting in modest enantioselectivity. The experimental process involved the reaction of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(5-bromopyridin-2-yl)propanoic acid(cas: 282734-37-6).Application In Synthesis of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(5-bromopyridin-2-yl)propanoic acid

The Article related to pyridyl amino acid preparation cross coupling organozinc serine, kinetic resolution catalyst pyridyl amino acid, Amino Acids, Peptides, and Proteins: Amino Acids and other aspects.Application In Synthesis of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(5-bromopyridin-2-yl)propanoic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 20, 2010, Lamberto, Massimiliano; Rastede, Elizabeth E.; Decker, Justyne; Raymo, Francisco M. published an article.Computed Properties of 52243-87-5 The title of the article was Microwave-assisted synthesis of symmetric and asymmetric viologens. And the article contained the following:

Viologens are generally synthesized by N-alkylating 4,4′-bipyridine with alkyl halides. Under conventional heating conditions, however, their synthesis suffers from long reaction times and, often, low yields. In this work, sym. and asym. viologens were synthesized under the assistance of microwave irradiation in good to excellent yields and in short reaction times. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Computed Properties of 52243-87-5

The Article related to sym asym viologen microwave assisted synthesis, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Computed Properties of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On September 9, 1980, Chen, Min-Feng published a patent.Electric Literature of 52243-87-5 The title of the patent was 1,1′-Dialkyl-4,4′-bipyridinium dihalides and their herbicidal use. And the patent contained the following:

The title compounds I (R = alkyl, X = halogen) were prepared by treating 4,4′-bipyridine (II) with a haloalkanoic acid and H2O at pH <4. Thus II was treated with saturated aqueous ClCH2CO2H to give I (R = Me, X = Cl) in 99% yield. The experimental process involved the reaction of 1,1'-Dipropyl-[4,4'-bipyridine]-1,1'-diium bromide(cas: 52243-87-5).Electric Literature of 52243-87-5

The Article related to dialkylbipyridinium dihalide, bipyridinium dialkyl dihalide, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Electric Literature of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On April 30, 1980, Chen, Ming-Feng published a patent.HPLC of Formula: 52243-87-5 The title of the patent was 1,1′-Dialkyl-4,4′-bipyridylium dihalide. And the patent contained the following:

The title compounds I (R = C1-3 alkyl; X = Cl, Br) were obtained by quaternizing 4,4′-bipyridine (II) with haloalkanoic acid. Thus II was treated with ClCH2CO2H at 120° to give 99% I (R = Me, X = Cl). The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).HPLC of Formula: 52243-87-5

The Article related to bipyridine quaternization haloalkanoate, dialkylbipyridinium halide, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.HPLC of Formula: 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On May 15, 2013, Qian, Guodong; Rao, Xingtang; Cai, Jianfeng; Cui, Yuanjing; Yang, Yu; Wang, Zhiyu published a patent.COA of Formula: C21H13NO8 The title of the patent was Preparation of metal organic frame material for adsorbing and storing methane. And the patent contained the following:

The title metal organic frame material has a three-dimensional network structure consisting of transitional metal ion and organic ligand through coordination bonds or intermol. force, and is prepared by dissolving nitrate, acetate, chloride, carbonate, sulfate or perchlorate of Cu, Zn, Cd, Co, Ni or Mn and I (R1-3 =H, F, Me, NH2, MeO, HO, NO2) in water and/or organic solvent, reacting at 40-120°C to give the metal organic frame material, allowing exchange of the metal organic frame material with acetone, and activating at 0°C under vacuum condition for 36 h and then at 100°C for 12 h. The three-dimensional network structure has sp. surface area 2000-3000 m2/g and pore volume 1-2 cm3/g. Preferably, the transitional metal ion is divalent Cu, Zn, Co, Ni, Cd, and Mn ion. The organic ligand contains pyridine, F, Me, amino, methoxy, hydroxy, nitro, etc., which do not participate in coordination. The metal organic frame material has high sp. surface area, pore volume, and thermal stability, large methane adsorption and storage capacity under variable temperature and variable pressure, simple preparation process, low cost, and repeated use. The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).COA of Formula: C21H13NO8

The Article related to metal organic frame material preparation methane adsorption storage, Unit Operations and Processes: Separation Processes and other aspects.COA of Formula: C21H13NO8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On April 17, 2013, Qian, Guodong; Rao, Xingtang; Cai, Jianfeng; Yu, Jiancan; Cui, Yuanjing; Yang, Yu; Wang, Zhiyu; Fan, Xianping; Wang, Minquan published a patent.Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid The title of the patent was Metal organic framework substance for acetylene adsorption and storage and its preparation method. And the patent contained the following:

The metal organic framework substance material uses transition metal ions and a multi-dentate organic ligand 5,5′-(pyridine-2,5-diyl)-isophthalic acid to form three-dimensional network structure through coordination bonds or intermol. forces. Transition metal ions are preferably divalent copper, zinc, cobalt, nickel, cadmium ion. The metal organic framework substance material, has simple manufacture process, has high sp. surface area 2,000-2,200 m2/g and high pore volume 1.0-1.3 cm3/g. The method includes (1) dissolving di-Me 5-amino-m-phthalate in 15 weight% hydrobromic acid solution, stirring and cooling to 0-5°C, dripping 2.5mol/L sodium nitrite solution, diazotizing to obtain diazo salt solution; (2) dissolving cuprous bromide in 15 weight% hydrobromic acid solution, cooling to 0°C, dripping diazo salt solution under stirring, reacting at 0°C for 20-30 min, reacting at room temperature for ≥5 h, filtering to sep. organic layer, water washing, dissolving organic layer in dichloromethane, drying with anhydrous MgSO4, filtering, purifying by column chromatog. to obtain di-Me 5-bromo-m-phthalate; (3) dissolving di-Me 5-bromo-m-phthalate and bis(pinacolato)diboron in dried dioxane, adding potassium acetate and bis(triphenylphosphine) palladium dichloride, reacting at 65-70°C for 12 h, extracting with Et acetate, drying organic layer with anhydrous magnesium sulfate, removing organic solvent, purifying by column chromatog. to obtain di-Me pinacol 5-borate-1,3-phthalate. The method further includes (4) dissolving di-Me pinacol 5-borate-1,3-phthalate and 2,5-dibromopyridine in dioxane solution, adding potassium carbonate and catalyst bis(triphenylphosphine) palladium dichloride, reflux stirring under Ar protection at 70-90°C for 8-24 h, extracting with chloroform, collecting organic phase, evaporating solvent off, re-crystallizing with toluene to obtain product di-Me 5,5′-(pyridin-2,5-diyl)-m-phthalate; (5) dissolving in 3.0 mol/L NaOH solution, refluxing at 100°C for 12 h, cooling to room temperature, regulating pH to 1-2, ageing for 12 h, filtering, water washing, drying to obtain 5,5′-(pyridin-2,5-diyl)-m-phthalic acid; and (6) dissolving Cu, Zn, Cd, Co or Ni nitrate, acetate, chloride, carbonate, sulfate or perchlorate with 5,5′-(pyridin-2,5-diyl)-m-phthalic acid in water or/and organic solvent, reacting at 40-120°C to obtain title product. The material introduces pyridine-containing basic unit to multi-dentate organic ligand, and can effectively improve adsorption and storage amount of acetylene. The material is provided with relatively high acetylene adsorption amounts under 273 K and 298 K temperature condition, may be used at low pressure, and is expected to be used as a novel effective acetylene adsorbing and storing material. The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

The Article related to metal pyridin diyl phthalic acid framework acetylene adsorption storage, Unit Operations and Processes: Separation Processes and other aspects.Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On November 26, 1976, there was a patent about herbicides.Category: pyridine-derivatives The title of the patent was Herbicidal quaternary bipyridylium salts. And the patent contained the following:

The salts I (R, R1 = alkyl, alkenyl, alkynyl, substituted alkyl; X, X1 = Cl, Br, iodo, 4-MeC6H4SO3) (104 compounds) were prepared by quaternization. Thus 4,4′-bipyridine was treated with EtI and 4-(4-pyridyl)pyridinium ethiodide treated with CH2:CMeCH2I to give I (R = Et, R1 = CH2CMe:CH2, X = X1 = iodo). At 1 kg/ha I (R = Et, R1 = CH2CMe:CH2, X = X1 = iodo) post emergence gave ∼80% control of Avena fatua. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Category: pyridine-derivatives

The Article related to bipyridinium salt, quaternary bipyridinium salt, herbicide bipyridinium salt, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On June 22, 2018, Han, Zhengbo; Zhao, Siyu published a patent.Application In Synthesis of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid The title of the patent was Preparation method of indium-based metal organic anion framework material and its application in adsorption of cationic organic dye. And the patent contained the following:

The title preparation method includes (1) mixing indium nitrate, 5,5′-(pyridyl-2,5-disubstituted)-1,3-phthalic acid (H4L), N,N-dimethylformamide and nitric acid, and stirring; and (2) reacting at 353-363 K for 3 d, cooling, standing for at least 1 d, washing with N,N-dimethylformamide, filtering, and drying to obtain the final metal organic anion framework material. The material can be used in adsorption of cationic organic dyes such as methylene blue. The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).Application In Synthesis of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

The Article related to indium pyridyl phthalate mof preparation crystal structure dye adsorption, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.Application In Synthesis of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem