Category: Pyrazines

Rehman, AU; Khan, MT; Liu, H; Wadood, A; Malik, SI; Chen, HF in [Rehman, Ashfaq Ur; Liu, Hao; Chen, Hai-Feng] Shanghai Jiao Tong Univ, Sch Life Sci & Biotechnol, Natl Expt Teaching Ctr Life Sci & Biotechnol, State Key Lab Microbial Metab,Dept Bioinformat &, Shanghai 200240, Peoples R China; [Chen, Hai-Feng] Shanghai Ctr Bioinformat Technol, Shanghai 200235, Peoples R China; [Khan, Muhammad Tahir; Malik, Shaukat Iqbal] Capital Univ Sci & Technol, Dept Bioinformat & Biosci, Islamabad 44000, Pakistan; [Rehman, Ashfaq Ur; Wadood, Abdul] Abdul Wali Khan Univ Marden, Dept Biotechnol, Mardan 23200, Pakistan published Exploring the Pyrazinamide Drug Resistance Mechanism of Clinical Mutants T370P and W403G in Ribosomal Protein S1 of Mycobacterium tuberculosis in 2019, Cited 62. Application In Synthesis of Pyrazine-2-carboxylic acid. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

Pyrazinamide (PZA) is an essential first line antitubercular drug, which plays a crucial role in tuberculosis treatment. The PZA, which is considered as a pro-drug needs an enzyme of mycobacterial pyrazinamidase (PZase) for its conversion into an active form pyrazinoic acid. Further, this active form of PZA inhibits the ribosomal proteins Si, which facilitates the transfer-mRNA complex formation throughout the translation. The spontaneous mutations in RpsA have been found to be associated with PZA drug resistance. However, the drug resistance mechanism is still unclear. Furthermore, there is no such information available about the structural dynamics of RpsA protein because of mutations that confer Pyrazinoic acid resistance. Moreover, a total of 18 clinical PZA-resistant isolates were investigated and found to be pncA(WT), which allowed exploration of the resistance mechanism of RpsA in the mutated state. Samples were repeated for the drug susceptibility testing followed by RpsA gene sequencing. A total of 11 clinical isolates harbored a total of 15 mutations. Almost half of the total strains (7/15) were observed to be in the conserved region of RpsA and known as Mycobacterium tuberculosis C-terminal domain. In the current study, (2/7) mutation T370P (mutant 1) and W403G (mutant 2) were explored to ensure the RpsA resistance mechanism through essential dynamics simulation. The essential dynamics study results revealed that the distal loop mutations drastically altered the conformation of RpsA both in the absence () and presence (+) of pyrazinoic acid drug for two reasons: (1) dramatic alteration or reduction in the binding pattern of pyrazinoic acid with active site residues observed and (2) a clear image of the opening and closing switching mechanism was seen upon the distal site mutation on nearby 3(10)-helixes beside the pyrazinoic acid binding site. This switch was found to consistently remain closed only in wild type systems, while it was open in the mutant systems. We called such distance impact an allosteric effect. The overall mechanistic investigations will provide useful information behind drug resistance for better understanding to manage tuberculosis.

Welcome to talk about 98-97-5, If you have any questions, you can contact Rehman, AU; Khan, MT; Liu, H; Wadood, A; Malik, SI; Chen, HF or send Email.. Application In Synthesis of Pyrazine-2-carboxylic acid

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Recommanded Product: 98-97-5. In 2019 INORG CHEM published article about MONOCARBOXYLATE-N-OXIDES; LIQUID-LIQUID-EXTRACTION; 2-PYRAZINECARBOXYLIC ACID; THEORETICAL INSIGHTS; LUMINESCENCE; SEPARATION; EUROPIUM(III); EU3+; LANTHANIDES; SELECTIVITY in [Dumpala, Rama Mohana Rao; Rawat, Neetika] Bhabha Atom Res Ctr, Radioanalyt Chem Div, Mumbai 400085, Maharashtra, India; [Boda, Anil; Ali, Sk. Musharaf] Bhabha Atom Res Ctr, Chem Engn Div, Mumbai 400085, Maharashtra, India; [Kumar, Pranaw] Bhabha Atom Res Ctr, Fuel Chem Div, Mumbai 400085, Maharashtra, India in 2019, Cited 52. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

The denticity, flexibility, and steric hindrance of the ligand are key factors in deciding the mode and number of coordination around a metal ion on complex formation. The thermodynamic aspects of lanthanide complexation with various multidentate ligands provides a significant insight into understand the coordination chemistry of lanthanides in framing the relevant metal organic networks for the applications in biological, biochemical and medical aspects. The pyrazine carboxylic acids are known to form many structurally important complexes and further can form chelates with coordination number of eight for europium in which more water molecules can be knocked out from the primary coordination sphere than demanded by denticity of the ligand. The present studies aimed at ESI-MS characterization and determination of the thermodynamic parameters (log beta, Delta G, Delta H, and Delta S), luminescence properties of europium complexes with pyrazine-2-carboxylate and pyrazine-2,3-dicarboxylate in aqueous solutions by experiment as well as theory. Time resolved luminescence spectroscopy supported by DFT calculations are carried out to optimize the stable geometries of the complexes with various modes of binding and coordination. Furthermore, the thermodynamic parameters estimated theoretically have been used to trace the path of complex formation.

Recommanded Product: 98-97-5. Welcome to talk about 98-97-5, If you have any questions, you can contact Dumpala, RMR; Boda, A; Kumar, P; Rawat, N; Ali, SM or send Email.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

An article Preparation and biological evaluation of soluble tetrapeptide epoxyketone proteasome inhibitors WOS:000482845600016 published article about CARFILZOMIB; DESIGN in [Lei, Meng; Miao, Hang; Feng, Huayun] Nanjing Forestry Univ, Coll Sci, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China; [Zhang, Haoyang; Du, Xiao; Zhou, Hui; Wang, Xueyuan; Zhu, Yongqiang] Nanjing Normal Univ, Coll Life Sci, 1 Wenyuan Rd, Nanjing 210046, Jiangsu, Peoples R China; [Wang, Jia; Shi, Jingmiao; Liu, Zhaogang; Zhu, Yongqiang] Jiangsu Chia Tai Fenghai Pharmaceut Co Ltd, 9 Weidi Rd, Nanjing 210046, Jiangsu, Peoples R China; [Shen, Jian] Nanjing Normal Univ, Coll Chem & Mat Sci, 1 Wenyuan Rd, Nanjing 210046, Jiangsu, Peoples R China in 2019, Cited 21. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5. COA of Formula: C5H4N2O2

A series of novel tetrapeptidyl epoxyketone inhibitors of 20S proteasome was designed and synthesized. To fully understand the SAR, various groups at R-1, R-2, R-3, R-4 and R-5 positions, including aromatic and aliphatic substituents were designed, synthesized and biologically assayed. Based on the enzymatic results, seven compounds were selected to evaluate their cellular activities and soluble compound 36 showed strong potency against human multiple myeloma (MM) cell lines. Microsomal stability results indicated that compound 36 was more stable in mice, rat and human microsomes than marketed carfilzomib. The in vivo activities of this compound were evaluated with the xenograft mice models of MM cell lines ARH77 and RPMI-8226 with luciferase expression and the T/C value of the two models were 49.5% and 37.6%, respectively. To evaluate the potential cardiovascular toxicity, inhibition of hERG ion channel in HEK293 cells by compound 36 and carfilzomib was carried out. The results indicated that 36 had no binding affinity for the hERG ion channel while carfilzomib could bind it with IC50, of 92.1 mu M.

COA of Formula: C5H4N2O2. Welcome to talk about 98-97-5, If you have any questions, you can contact Lei, M; Zhang, HY; Miao, H; Du, X; Zhou, H; Wang, J; Wang, XY; Feng, HY; Shi, JM; Liu, ZG; Shen, J; Zhu, YQ or send Email.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

An article Synthesis and catalytic applications of Ru and Ir complexes containing N,O-chelating ligand WOS:000575166800007 published article about TRANSFER HYDROGENATION; ALPHA-ALKYLATION; RUTHENIUM(II) COMPLEXES; PRIMARY ALCOHOLS; KETONES; IRIDIUM; DEHYDROGENATION; REACTIVITY; SECONDARY; BEARING in [Pakyapan, Bilge; Kavukcu, Serdar Batikan; Turkmen, Hayati] Univ Ege, Fac Sci, Dept Chem, TR-35100 Izmir, Turkey; [Sahin, Zarife Sibel] Univ Sinop, Sci & Technol Res Applicat & Res Ctr, Sinop, Turkey in 2020, Cited 44. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5. COA of Formula: C5H4N2O2

A series of monometallic complexes (Ru1-3, Ir-1(-3)) which have N,O-chelating ligand (pyrazine-2carboxylate (1), pyridine-2-carboxylate (2), quinoline carboxylate(3) and bimetallic complexes (Ru-4,Ru-5, Ir-4(,5)) bridged by pyrazine-2,3- dicarboxylate (4) and imidazole-4,5-dicarboxylate(5) were synthesized and characterized by H-1-, C-13 NMR, FT-IR, and elemental analysis. The crystal structure of Ir-2 was determined by X-ray crystallography. The complexes (Ru1-5, Ir1-5) were applied to investigate the electronic and steric effect of ligand in their catalytic activities in transfer hydrogenation and alpha(alpha)-alkylation reaction of ketones with alcohols. The activities of iridium complexes (Ir1-5) were much more efficient than ruthenium complexes (Ru1-5). The highest activity for both reactions was observed for the complex (Ir2 ) with pyridine-2-carboxylate. The Ir hydride species was monitored for both reactions. (C) 2020 Elsevier B.V. All rights reserved.

COA of Formula: C5H4N2O2. Bye, fridends, I hope you can learn more about C5H4N2O2, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

In 2020 ACS MED CHEM LETT published article about 2,4-METHANOPROLINE in [Duffy, James; Laleu, Benoit] Med Malaria Venture, CH-1215 Geneva 15, Switzerland; [Cox, Brian; Zdorichenko, Victor; Bellanger, Corentin; Bishop, Stephen J.] Univ Sussex, Photodivers Ltd, Sch Life Sci, Brighton BN1 9QJ, E Sussex, England; [Hurcum, Jessica] Univ Sussex, Sch Life Sci, Brighton BN1 9QJ, E Sussex, England; [Booker-Milburn, Kevin, I; Elliott, Luke D.] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England; [Booker-Milburn, Kevin, I; Robertson-Ralph, Michael] Univ Bristol, Sch Chem, Photodivers Ltd, Bristol BS8 1TS, Avon, England; [Swain, Christopher J.] Cambridge MedChem Consulting, Cambridge CB22 4RN, England; [Hallyburton, Irene; Anderson, Mark] Univ Dundee, Wellcome Ctr Antiinfect Res, Drug Discovery Unit, Dundee DD1 5EH, Scotland in 2020, Cited 18. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5. SDS of cas: 98-97-5

We utilized synthetic photochemistry to generate novel sp 3 -rich scaffolds and report the design, synthesis, and biological testing of a diverse series of amides based on the 1-(amino-methyl)-2-benzyl-2-azabicyclo[2.1.1]hexane scaffold. Preliminary antimalarial screening of the library provided promising compounds with activity in the 1-5 mu M range with an enhanced hit rate. Further evaluation (solubility, drug metabolism and pharmacokinetics (DMPK), and toxicity) of a selected compound (9) suggested that this series represents an excellent opportunity for further optimization with the framework offering multiple opportunities for the addition of uniquely vectorally positioned extra functionality.

Welcome to talk about 98-97-5, If you have any questions, you can contact Cox, B; Duffy, J; Zdorichenko, V; Bellanger, C; Hurcum, J; Laleu, B; Booker-Milburn, KI; Elliott, LD; Robertson-Ralph, M; Swain, CJ; Bishop, SJ; Hallyburton, I; Anderson, M or send Email.. SDS of cas: 98-97-5

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

An article Factors affecting the metal-enhanced luminescence of lanthanide complexes by Ag@SiO2 nanoparticles WOS:000573230200005 published article about FLUORESCENCE; SILVER; SURFACE in [Zhao, Yanfang; Wang, Ailing; Kang, Jie; Chu, Haibin; Zhang, Haixia; Zhao, Yongliang] Inner Mongolia Univ, Coll Chem & Chem Engn, Hohhot 010021, Peoples R China; [Zhao, Yanfang] Inner Mongolia Vocat Coll Chem Engn, Hohhot 010070, Peoples R China in 2020, Cited 40. Name: Pyrazine-2-carboxylic acid. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

Metal-enhanced luminescence (MEL) via Ag@SiO2 nanoparticles provides a promising strategy for the superior luminescence of lanthanide complexes. However, because of the delicate structure of the composites of Ag@SiO2 and complexes, it remains a great challenge to achieve the ideal MEL effect. Herein, five types of Ag@SiO2 nanoparticles with distinct core sizes (100 and 46 nm) and varied silica shell thickness (3, 24, 32, 52 and 55 nm) were prepared. Four kinds of lanthanide complexes RE(BA)(3)center dot H2O and RE(pyca)(3)center dot 2H(2)O (RE = Eu and Tb, BA = benzoate, pyca = 2-pyrazine carboxylate) were synthesized. A series of REL3-Ag@SiO2 (L = BA(-), pyca(-)) composite nanoparticles were prepared through the interaction of the Ag@SiO2 nanoparticles and the complexes. The adsorption of the complexes on the surface of Ag@SiO2 nanoparticles was confirmed by transmission electron microscope and energy dispersive X-ray spectroscopy. Luminescence property investigation showed that the factors affecting the MEL effect included the excitation and emission wavelength of lanthanide complexes, the kinds of lanthanide ions and organic ligands, as well as the core size and shell thickness of Ag@SiO2. Among these factors, the excitation wavelength of lanthanide complexes and the SiO2 shell thickness were found to play decisive roles. Finally, 25.92 times enhancement in luminescent intensity and 7.4 times increase in luminescence quantum yield can be achieved on Tb(BA)(3)center dot H2O by Ag@SiO2 with core size of 46 nm and shell thickness of 24 nm.

Bye, fridends, I hope you can learn more about C5H4N2O2, If you have any questions, you can browse other blog as well. See you lster.. Name: Pyrazine-2-carboxylic acid

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Category: Pyrazines. Recently I am researching about TUBERCULOSIS; RESISTANCE; MUTATIONS; PROTEASE; COMPLEX, Saw an article supported by the Singapore Ministry of Health’s National Medical Research CouncilNational Medical Research Council, Singapore [NMRC/TCR/011-NUHS/2014, NMRC/CG/013/2013]; Yong Loo Lin School of Medicine graduate scholarship; National Institute of Allergy and Infectious Diseases of the National Institutes of HealthUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) – USANIH National Institute of Allergy & Infectious Diseases (NIAID) [2R01AI10639805, P01AI095208]; Bill and Melinda Gates FoundationBill & Melinda Gates Foundation [OPP1181211]; National Research Foundation (NRF) SingaporeNational Research Foundation, Singapore [NRF-CRP18-2017-01]. Published in NATURE PUBLISHING GROUP in LONDON ,Authors: Gopal, P; Sarathy, JP; Yee, M; Ragunathan, P; Shin, J; Bhushan, S; Zhu, JH; Akopian, T; Kandror, O; Lim, TK; Gengenbacher, M; Lin, QS; Rubin, EJ; Gruber, G; Dick, T. The CAS is 98-97-5. Through research, I have a further understanding and discovery of Pyrazine-2-carboxylic acid

Pyrazinamide is a sterilizing first-line tuberculosis drug. Genetic, metabolomic and biophysical analyses previously demonstrated that pyrazinoic acid, the bioactive form of the prodrug pyrazinamide (PZA), interrupts biosynthesis of coenzyme A in Mycobacterium tuberculosis by binding to aspartate decarboxylase PanD. While most drugs act by inhibiting protein function upon target binding, we find here that pyrazinoic acid is only a weak enzyme inhibitor. We show that binding of pyrazinoic acid to PanD triggers degradation of the protein by the caseinolytic protease ClpC1-ClpP. Thus, the old tuberculosis drug pyrazinamide exerts anti-bacterial activity by acting as a target degrader, a mechanism of action that has recently emerged as a successful strategy in drug discovery across disease indications. Our findings provide the basis for the rational discovery of next generation PZA.

Category: Pyrazines. Welcome to talk about 98-97-5, If you have any questions, you can contact Gopal, P; Sarathy, JP; Yee, M; Ragunathan, P; Shin, J; Bhushan, S; Zhu, JH; Akopian, T; Kandror, O; Lim, TK; Gengenbacher, M; Lin, QS; Rubin, EJ; Gruber, G; Dick, T or send Email.

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

An article Design, synthesis, in vitro and in vivo evaluation against MRSA and molecular docking studies of novel pleuromutilin derivatives bearing 1, 3, 4-oxadiazole linker WOS:000661874800004 published article about RESISTANCE; ANTIBIOTICS; ANIMALS in [Liu, Jie; Zhang, Guang-Yu; Zhang, Zhe; Li, Bo; Chai, Fei; Wang, Qi; Zhou, Zi-Dan; Xu, Ling-Ling; Wang, Shou-Kai; Jin, Zhen; Tang, You-Zhi] South China Agr Univ, Coll Vet Med, Guangdong Prov Key Lab Vet Pharmaceut Dev & Safet, Guangzhou 510642, Peoples R China; [Jin, Zhen; Tang, You-Zhi] Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China in 2021, Cited 29. COA of Formula: C5H4N2O2. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

A class of pleuromutilin derivatives containing 1, 3, 4-oxadiazole were designed and synthesized as potential antibacterial agents against Methicillin-resistant staphylococcus aureus (MRSA). The ultrasound-assisted reaction was proposed as a green chemistry method to synthesize 1, 3, 4-oxadiazole derivatives (intermediates 85-110). Among these pleuromutilin derivatives, compound 133 was found to be the strongest antibacterial derivative against MRSA (MIC = 0.125 mu g/mL). Furthermore, the result of the time-kill curves displayed that compound 133 could inhibit the growth of MRSA in vitro quickly (- 4.36 log10 CFU/mL reduction). Then, compound 133 (1.82 log10 CFU/mL) displayed superior in vivo antibacterial efficacy than tiamulin (- 0.82 log10 CFU/mL) in reducing MRSA load in mice thigh model. Besides, compound 133 exhibited low cytotoxicity to RAW 264.7 cells. Molecular docking studies revealed that compound 133 was successfully localized in the binding pocket of 50S ribosomal subunit (delta Gb = -10.50 kcal/mol). The results indicated that these pleuromutilin derivatives containing 1, 3, 4-oxadiazole might be further developed into novel antibiotics against MRSA.

Welcome to talk about 98-97-5, If you have any questions, you can contact Liu, J; Zhang, GY; Zhang, Z; Li, B; Chai, F; Wang, Q; Zhou, ZD; Xu, LL; Wang, SK; Jin, Z; Tang, YZ or send Email.. COA of Formula: C5H4N2O2

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

SDS of cas: 98-97-5. In 2020 J MED CHEM published article about ANTIINFLAMMATORY DRUGS; IMMUNOPROTEASOME; DESIGN; CELLS; RISK in [Bhattarai, Deepak; Lee, Min Jae; Miller, Zachary; Kim, Kyung Bo] Univ Kentucky, Dept Pharmaceut Sci, Lexington, KY 40536 USA; [Baek, Ahruem; Baek, Yu Mi; Kim, Dong-Eun] Konkuk Univ, Dept Biosci & Biotechnol, Seoul 05029, South Korea; [Yeo, In Jun; Hong, Jin Tae] Chungbuk Natl Univ, Coll Pharm, Cheongju 28160, Chungbuk, South Korea; [Lee, Sukyeong] Baylor Coll Med, Verna & Marrs McLean Dept Biochem & Mol Biol, Houston, TX 77030 USA in 2020, Cited 43. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

The immunoproteasome (iP), an inducible proteasome variant harboring three immunosubunits, low molecular mass polypeptide-2 (LMP2), multicatalytic endopeptidase complex subunit-1, and low molecular mass polypeptide-7 (LMP7), is involved in multiple facets of inflammatory responses. We recently reported that YU102, a dual inhibitor of the iP subunit LMP2 and the constitutive proteasome catalytic subunit beta 1, ameliorates cognitive impairments in mouse models of Alzheimer’s disease (AD) independently of amyloid deposits. To investigate whether inhibition of LMP2 is sufficient to improve the cognitive functions of AD mice, here we prepared 37 YU102 analogues and identified a potent LMP2 inhibitor DB-310 (28) (IC50: 80.6 nM) with improved selectivity and permeability in cells overexpressing ABCB1 transporters. We show that DB-310 induces suppression of IL-1 alpha production in microglia cells and improves cognitive functions in the Tg2576 transgenic mouse model of AD. This study supports that inhibition of LMP2 is a promising therapeutic strategy for treatment of AD.

Welcome to talk about 98-97-5, If you have any questions, you can contact Bhattarai, D; Lee, MJ; Baek, A; Yeo, IJ; Miller, Z; Baek, YM; Lee, S; Kim, DE; Hong, JT; Kim, KB or send Email.. SDS of cas: 98-97-5

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Authors Dumpala, RMR; Boda, A; Kumar, P; Rawat, N; Ali, SM in AMER CHEMICAL SOC published article about MONOCARBOXYLATE-N-OXIDES; LIQUID-LIQUID-EXTRACTION; 2-PYRAZINECARBOXYLIC ACID; THEORETICAL INSIGHTS; LUMINESCENCE; SEPARATION; EUROPIUM(III); EU3+; LANTHANIDES; SELECTIVITY in [Dumpala, Rama Mohana Rao; Rawat, Neetika] Bhabha Atom Res Ctr, Radioanalyt Chem Div, Mumbai 400085, Maharashtra, India; [Boda, Anil; Ali, Sk. Musharaf] Bhabha Atom Res Ctr, Chem Engn Div, Mumbai 400085, Maharashtra, India; [Kumar, Pranaw] Bhabha Atom Res Ctr, Fuel Chem Div, Mumbai 400085, Maharashtra, India in 2019, Cited 52. Safety of Pyrazine-2-carboxylic acid. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

The denticity, flexibility, and steric hindrance of the ligand are key factors in deciding the mode and number of coordination around a metal ion on complex formation. The thermodynamic aspects of lanthanide complexation with various multidentate ligands provides a significant insight into understand the coordination chemistry of lanthanides in framing the relevant metal organic networks for the applications in biological, biochemical and medical aspects. The pyrazine carboxylic acids are known to form many structurally important complexes and further can form chelates with coordination number of eight for europium in which more water molecules can be knocked out from the primary coordination sphere than demanded by denticity of the ligand. The present studies aimed at ESI-MS characterization and determination of the thermodynamic parameters (log beta, Delta G, Delta H, and Delta S), luminescence properties of europium complexes with pyrazine-2-carboxylate and pyrazine-2,3-dicarboxylate in aqueous solutions by experiment as well as theory. Time resolved luminescence spectroscopy supported by DFT calculations are carried out to optimize the stable geometries of the complexes with various modes of binding and coordination. Furthermore, the thermodynamic parameters estimated theoretically have been used to trace the path of complex formation.

Welcome to talk about 98-97-5, If you have any questions, you can contact Dumpala, RMR; Boda, A; Kumar, P; Rawat, N; Ali, SM or send Email.. Safety of Pyrazine-2-carboxylic acid

Reference:
Patent; Chevron Research Company; US4732894; (1988); A;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem