Category: 93-60-7

Houlihan, Joanna C. C.; Moratti, Stephen C.; Hanton, Lyall R. published the artcile< Formation of a robust, double-walled LiMOF from an L-shaped di-substituted N-heterocyclic adamantane-based ligand>, Related Products of 93-60-7, the main research area is preparation lithium copper zinc heterocyclic adamantane complex; crystal structure lithium copper zinc heterocyclic adamantane complex; lithium copper zinc heterocyclic adamantane MOF.

The properties of adamantane render it an attractive building block towards the synthesis of robust frameworks. This work describes the synthesis of the L-shaped 1,3-bis(3′-carboxypyridine)adamantane (L1) ligand and the corresponding Li(I), Zn(II) and Cu(II) frameworks. Three topol. analogous Li(I) frameworks LiMOF12, LiMOF30 and LiMOF50 are reported, with calculated solvent accessible void volumes of 46, 43 and 36%, resp. The reaction between the carboxylate groups of L1 and the Li(I) cations gave Li-carboxylate rods. The Li-carboxylate rods contributed to the formation of a double-walled MOF with large, open one dimensional channels. The synergistic effect of the double wall, lithium-carboxylate rods and the adamantane core itself, gave a robust network stable up to temperatures of 300-350° and a min. of three months stability in air. Furthermore, complexation of L1 with Cu(BF4)2·H2O and Zn(CF3SO3)2 provided a 2D → 3D interpenetrated network containing a classic dimeric copper paddle-wheel SBU, and an infinite 1D chain which extended into a 3D structure facilitated by hydrogen-bonding interactions, resp.

Dalton Transactions published new progress about Crystal structure. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Related Products of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Keawkim, Kannika; Na Jom, Kriskamol published the artcile< Metabolomics and flavoromics analysis of chemical constituent changes during roasting of germinated Sacha inchi (Plukenetia volubilis L.)>, Related Products of 93-60-7, the main research area is metabolome flavorome roasting browning germination Plukenetia.

This study examined the changes in metabolites together with the flavor profiles of germinated Sacha inchi seeds during roasting by using gas chromatog. The results indicated that roasting partially increased the browning index, amino acid levels, total phenolic content, and antioxidant capacity, but slightly decreased the levels of reducing sugars. Oxidized and rancid compounds were significantly decreased at a 180 °C roasting temperature Pyrazine, furan, and pyrrole were Maillard reaction products that were increased at 180 °C of roasting. Roasting at 145 °C for 45 min after germination for 4 days was determined to be the optimal conditions for roasting germinated Sacha inchi seeds, which reduced the off-flavor and burned taste. The roasted germinated Sacha inchi seed contains higher amino acids than raw seed, which could be used as an alternative source for food products and supplements. In addition, the roasted germinated seeds at 4 days were recommended for food applications.

Food Chemistry: X published new progress about Alcohols Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Related Products of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Hou, Lixia; Zhang, Yujin; Li, Cuicui; Wang, Xuede; Wang, Selina C. published the artcile< Determination of main bitter compounds in soaked and germinated sesame pastes>, HPLC of Formula: 93-60-7, the main research area is sesame paste germination soaking bitter compound determination; bitterness; germination; non-volatile; sesame pastes; volatile compounds.

The flavor and taste of the foods play an important or even a decisive role in the acceptance and preference of the consumers. It was found that the sesame paste prepared with the germinated sesame seeds was bitter in our previous experiment In the study, the volatile and non-volatile bitter-taste components of the sesame paste samples were comprehensively analyzed. 2-methylbutanal, hexanal, acetic acid, and butyric acid were the predominant volatile compounds in the soaked and germinated sesame pastes. Oxalate was significantly reduced by the germination (p < 0.05). The contents of sesaminoltriglucoside in sesame pastes ranged from 129.04 to 217.57μg/g. Both total and individual free amino acid contents increased with the prolongation of the germinating time. The bitter-taste amino acid Arg had the highest score of Taste Activity Value for the bitterest sample made from the seeds germinated for 36 h. The bitter-tasting Arg was first reported to impart a bitter taste to the germinated sesame paste. Journal of Oleo Science published new progress about Acids Role: ANT (Analyte), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, HPLC of Formula: 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Liu, Jianguo; Chen, Jia-Yi; Jia, Mengjing; Ming, Bangrong; Jia, Jiong; Liao, Rong-Zhen; Tung, Chen-Ho; Wang, Wenguang published the artcile< Ni-O Cooperation versus Nickel(II) Hydride in Catalytic Hydroboration of N-Heteroarenes>, Quality Control of 93-60-7, the main research area is cyclopentadienyl nickel phosphinophenolate preparation catalyst hydroboration heteroarene pyridine kinetics; crystal structure cyclopentadienyl nickel phosphinophenolate phosphinothiophenolate complex borate adduct; mol structure cyclopentadienyl nickel phosphinophenolate phosphinothiophenolate complex borate adduct; potential energy surface nickel phosphinophenolate catalyst hydroboration pyridine.

An air-stable half-sandwich Ni(II) complex bearing a phosphinophenolato ligand, Cp*Ni(1,2-Ph2PC6H4O) (1), was designed and synthesized for activation of HBpin and catalytic hydroboration of N-heteroarenes such as pyridine. Through addition of the H-B bond across the Ni-O bond, 1 reacts with HBpin to afford an 18-electron Ni(II)-H intermediate [H1(Bpin)] featuring an O-stabilized B moiety, which readily reduces pyridine analogs to give the 1,2-hydroborated product, thus accomplishing the catalytic cycle under mild conditions. The necessity of the phosphinophenolato ligand to deliver the boryl group was manifested by the clear difference in the activity of 1 and Cp*NiH(PPh3) (3H) in catalytic hydroborations. The latter lacks a functional O atom and is inert to process the catalysis.

ACS Catalysis published new progress about Aromatic hydrocarbons Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent) (N-heteroarenes). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Quality Control of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Rashed, Nurnobi Md.; Masuda, Koichiro; Ichitsuka, Tomohiro; Koumura, Nagatoshi; Sato, Kazuhiko; Kobayashi, Shu published the artcile< Zirconium Oxide-Catalyzed Direct Amidation of Unactivated Esters under Continuous-Flow Conditions>, Product Details of C7H7NO2, the main research area is amine ester zirconium catalyst amidation green chem; amide preparation.

A sustainable and environmentally benign direct amidation reaction of unactivated esters with amines was developed in a continuous-flow system. A com. available amorphous zirconium oxide was found to be an efficient catalyst for this reaction. While the typical amidation of esters with amines required a stoichiometric amount of a promoter or metal activator, the present continuous-flow method enabled the direct amidation reaction under additive-free conditions with an extensive diversity towards various functional groups. High yields of the products were obtained with a nearly equimolar proportion of starting materials to reduce byproduct formation, which rendered this process applicable for use in a sequential-flow system.

Advanced Synthesis & Catalysis published new progress about Amidation. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Product Details of C7H7NO2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

He, Qidi; Cai, Shuangshuang; Wu, Jinghao; Hu, Ou; Liang, Lushan; Chen, Zuanguang published the artcile< Determination of tuberculosis-related volatile organic biomarker methyl nicotinate in vapor using fluorescent assay based on quantum dots and cobalt-containing porphyrin nanosheets>, Application In Synthesis of 93-60-7, the main research area is methyl nicotinate vapor fluorescent assay tuberculosis Mycobacterium; Fluorescent assay; Methyl nicotinate; Nanoporphyrin; Quantum dots; Tuberculosis; Volatile organic biomarker.

Me nicotinate (MN) is a representative and typical volatile organic marker of Mycobacterium tuberculosis, and the specific detection of MN in human breath facilitates non-invasive, rapid, and accurate epidemic screening of tuberculosis infection. Herein, we constructed a fluorescent assay consisted of CdTe quantum dots (QD) and cobalt-metalized tetrakis(4-carboxyphenyl) porphyrin (CoTCPP) nanosheets to determine Me nicotinate (MN) in vapor samples. Red-emission QD (λex=370 nm, λem=658 nm) acts as signal switches whose fluorescence signals can be effectively quenched by CoTCPP nanosheets but restored in the presence of MN. The strategy relied on the distinct binding affinity of cobalt ion and MN. MN restored the fluorescence of QD quenched by CoTCPP in a concentration-dependent manner, which exhibited a well-linear relationship in the range 1-100 μM, and a limit of detection of 0.59 μM. The proposed platform showed sensitivity and selectivity to detect MN in vapor samples with satisfactory RSD below 3.33%. The method is cheap, simple, and relatively rapid (detected within 4 min), which suggests a potential in tuberculosis diagnosis in resource- and professional-lacked areas.

Microchimica Acta published new progress about Fluorescence immunoassay. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Application In Synthesis of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ma, Cong; Zhao, Chuan-Qi; Xu, Xue-Tao; Li, Zhao-Ming; Wang, Xiang-Yang; Zhang, Kun; Mei, Tian-Sheng published the artcile< Nickel-Catalyzed Carboxylation of Aryl and Heteroaryl Fluorosulfates Using Carbon Dioxide>, Recommanded Product: 3-(Methoxycarbonyl)pyridine, the main research area is aromatic carboxylic acid ester preparation; aryl heteroaryl fluorosulfate carbon dioxide carboxylation nickel catalyst.

The development of efficient and practical methods to construct carboxylic acids using CO2 as a C1 synthon is of great importance. Nickel-catalyzed carboxylation of aryl fluorosulfates and heteroaryl fluorosulfates with CO2 is described, affording arene carboxylic acids with good to excellent yields under mild conditions. In addition, a one-pot phenol fluorosulfation/carboxylation is developed.

Organic Letters published new progress about Aromatic carboxylic acids Role: SPN (Synthetic Preparation), PREP (Preparation). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Recommanded Product: 3-(Methoxycarbonyl)pyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhang, Jiang; Chen, Xu-Feng; Huang, Wei-Tao; Chen, Huan-Huan; Lai, Ning-Wei; Yang, Lin-Tong; Huang, Zeng-Rong; Guo, Jiuxin; Ye, Xin; Chen, Li-Song published the artcile< Mechanisms for increased pH-mediated amelioration of copper toxicity in Citrus sinensis leaves using physiology, transcriptomics and metabolomics>, Quality Control of 93-60-7, the main research area is copper Citrus leaf toxicity transcriptomic metabolomic.

Limited data are available on the mol. and physiol. mechanisms for increased pH-mediated amelioration of copper (Cu) toxicity in plants. Citrus sinensis seedlings were fertilized with a nutrient solution at the Cu concentration of 300 (Cu toxicity) or 0.5μM (control) and a pH of 3.0, 4.0, or 4.8 for 17 wk. Subsequently, we examined the interactive effects of low pH and Cu toxicity on transcriptomics, metabolomics, and some physiol. parameters in leaves. Our results demonstrated that increased pH reduced Cu toxicity-induced leaf Cu accumulation and oxidative damage by reducing reactive oxygen species (ROS) production and maintaining the homeostasis of sulfur (S)-containing compounds (reduced glutathione), ascorbate, and cell redox potential, thus mitigating Cu toxic effects on leaf chlorophyll biosynthesis, photosynthesis, and metabolisms of carbohydrates, lipids, amino acids, and secondary metabolites. The increased pH mitigated Cu toxicity-induced impairment of cell wall metabolism by reducing cell wall Cu concentration, thus improving leaf growth. Under low pH (pH 3.0), C. sinensis leaves also displayed some adaptive responses to Cu toxicity to meet the increased demand for the dissipation of excess light energy and the detoxification of Cu and ROS, including: (a) increased distribution of Cu in cell wall; (b) elevated photorespiration and thermal dissipation. And increased accumulation of nonstructural carbohydrates [fructose, glucose, starch, total nonstructural carbohydrates (the summation of fructose + glucose + sucrose + starch), maltotetraose and 1,1-kestotetraose] and upregulation of metabolism (glycolysis/gluconeogenesis, pyruvate metabolism and pentose phosphate pathway) related to energy production; (d) downregulation of phospholipid [LysoPC 18:3(2 n isomer)] and phosphate-containing compounds (2′-deoxycytidine-5′-monophosphate and AMP) and upregulation of -tryptophan metabolism and related amino acids (-tryptophan and 5-hydroxy–tryptophan); and (e) increased accumulation of some secondary metabolites [total phenolics, lignin, alkaloids (3-indoleacrylic acid, N-acetyl-5-hydroxytryptamine and Me nicotinate), plumerane (indole and 3-indolepropionic acid) and coumarins (isoscopoletin, scopoletin, skimming and scopolin)]. However, these adaptive responses could not protect low pH-treated leaves from Cu toxicity, as indicated by elevated malondialdehyde accumulation and electrolyte leakage and decreased photosynthesis and chlorophyll level in leaves as well as reduced leaf growth due to impaired cell metabolism Cu toxicity intensified the adverse effects of low pH on C. sinensis leaves.

Environmental and Experimental Botany published new progress about Amino acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Quality Control of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ozturkkan Ozbek, Fureya Elif; Ugurlu, Guventurk; Kalay, Erbay; Necefoglu, Hacali; Hokelek, Tuncer published the artcile< Theoretical and experimental assessment of structural, spectroscopic, electronic and nonlinear optical properties of two aroylhydrazone derivative>, Related Products of 93-60-7, the main research area is structural spectroscopic electronic nonlinear optical property aroylhydrazone derivative.

Two aroylhydrazone, N’-(pyridine-4-ylmethylene)nicotic acid hydrazide (1) and N’-(pyridine-3-ylmethylene)nicotic acid hydrazide (2), were synthesized and their structures were determined by single-crystal X-ray diffraction anal. The X-ray anal. indicated that the compound 1 was crystallized in triclinic crystal system with P -1 space group a = 8.7899 (2) Å, b = 10.8983 (3) Å, c = 11.7726 (3) Å, α= 89.952 (3)°, β = 88.684 (3)°, γ= 75.293 (2)°, V = 1090.50 (5) Å3 and Z = 4 and compound 2 was crystallized in monoclinic crystal system with P21/c space group, a = 11.9239 (3) Å, b = 8.6495 (2) Å, c = 11.1021 (3) Å, α= 90 (3)°, β = 111.664 (3) (3)°, γ= 90°, V = 1064.14 (5) Å3 and Z = 4. Intermol. interactions of the compounds were determined by Hirhfeld Surface Anal. The H ··· H interactions with 37.9% (for compound 1) and 37.5% (for compound 2) contributions are the most important interactions to the overall crystal packings. FT-IR, Raman, 1H and 13C NMR and UV-Vis spectroscopy methods were used for spectroscopic characterization of the compounds The spectroscopic properties of the compounds were calculated theor. by using D. Functional Theory (DFT) with B3LYP and ab initio Hartree-Fock (HF) methods at different basis sets. A correlation was found between the theor. and exptl. values for the spectroscopic results. Moreover, the HOMO (HOMO), the LUMO (LUMO), elec. dipole moment (μ), polarizability (α) and hyperpolarizability (β) of the compounds were computed both DFT/B3LYP/6-311++G(d,p) and ab initio HF/6-311++G(d,p) methods. The calculated first hyperpolarizability value at the DFT/B3LYP/6-31++G (d,p) level of compound 1 with dimer structure is 18.14 times larger than urea, the standard nonlinear optical material. So, this value implies that compound 1 considered have potential candidates for designing high quality nonlinear optical materials. The energy gap (ΔEgap) and Mol. Electrostatic Potential (MEP) of the compounds were investigated. The structural and vibration frequency values calculated theor. were compared with the exptl. values.

Journal of Molecular Structure published new progress about Band gap. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Related Products of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Edelsbacher, Philipp; Redhammer, Guenther; Monkowius, Uwe published the artcile< Copper(II) complexes bearing cyclobutanecarboxylate and pyridine ligands: a new series of dinuclear paddle-wheel complexes>, Related Products of 93-60-7, the main research area is copper cyclobutanecarboxylate pyridine complex preparation; crystal structure copper cyclobutanecarboxylate pyridine.

Four members of a new series of paddle-wheel copper(II) complexes bearing cyclobutanecarboxylate as bridging ligand with pyridine derived ligands in axial positions are reported. They have been characterized by FTIR-ATR, UV-Vis spectroscopy, mass spectrometry, and single crystal X-ray diffraction. The synthesis is straight-forward by combining the carboxylic acid, copper(II) acetate, and a slight excess of a pyridine ligand. The mol. structures of three complexes reveal a coordination mode expected for such type of dinuclear copper(II) carboxylates.

Monatshefte fuer Chemie published new progress about Crystal structure. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Related Products of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem