Month: January 2022

Application In Synthesis of Pyrazine-2-carboxylic acid. Authors Guin, S; Dolui, P; Zhang, XL; Paul, S; Singh, VK; Pradhan, S; Chandrashekar, HB; Anjana, SS; Paton, RS; Maiti, D in WILEY-V C H VERLAG GMBH published article about in [Guin, Srimanta; Dolui, Pravas; Paul, Satyadip; Singh, Vikas Kumar; Pradhan, Sukumar; Chandrashekar, Hediyala B.; Anjana, S. S.; Maiti, Debabrata] Indian Inst Technol, Dept Chem, Mumbai 400076, Maharashtra, India; [Zhang, Xinglong; Paton, Robert S.] Univ Oxford, Chem Res Lab, Dept Chem, Mansfield Rd, Oxford OX1 3TA, England in 2019, Cited 72. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

Directed C-H functionalization has been realized as a complementary tool to the traditional approaches for a straightforward access of non-proteinogenic amino acids; albeit such a process is restricted mostly up to the gamma-position. In the present work, we demonstrate the diverse (hetero) arylation of amino acids and analogous aliphatic amines selectively at the remote delta-position by tuning the reactivity controlled by ligands. An organopalladium delta-C(sp(3))-H activated intermediate has been isolated and crystallographically characterized. Mechanistic investigations carried out experimentally in conjunction with computational studies shed light on the difference in the mechanistic picture depending on the substrate structure.

Welcome to talk about 98-97-5, If you have any questions, you can contact Guin, S; Dolui, P; Zhang, XL; Paul, S; Singh, VK; Pradhan, S; Chandrashekar, HB; Anjana, SS; Paton, RS; Maiti, D or send Email.. Application In Synthesis of Pyrazine-2-carboxylic acid

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

In 2019 MOLECULES published article about STANDARD MOLAR ENTHALPY; STRUCTURE-PROPERTY RELATIONSHIPS; THERMODYNAMIC PROPERTIES; IONIC LIQUIDS; THERMOPHYSICAL PROPERTIES; TEMPERATURE-RANGE; GROUP ADDITIVITY; VAPOR-PRESSURES; THERMAL-ANALYSIS; COMPUTATIONAL THERMOCHEMISTRY in [Naef, Rudolf] Univ Basel, Dept Chem, CH-4003 Basel, Switzerland in 2019, Cited 287. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5. HPLC of Formula: C5H4N2O2

A universally applicable method for the prediction of the isobaric heat capacities of the liquid and solid phase of molecules at 298.15 K is presented, derived from their true volume. The molecules’ true volume in A(3) is calculated on the basis of their geometry-optimized structure and the Van-der-Waals radii of their constituting atoms by means of a fast numerical algorithm. Good linear correlations of the true volume of a large number of compounds encompassing all classes and sizes with their experimental liquid and solid heat capacities over a large range have been found, although noticeably distorted by intermolecular hydrogen-bond effects. To account for these effects, the total amount of 1303 compounds with known experimental liquid heat capacities has been subdivided into three subsets consisting of 1102 hydroxy-group-free compounds, 164 monoalcohols/monoacids, and 36 polyalcohols/polyacids. The standard deviations for Cp(liq,298) were 20.7 J/mol/K for the OH-free compunds, 22.91 J/mol/K for the monoalcohols/monoacids and 16.03 J/mol/K for the polyols/polyacids. Analogously, 797 compounds with known solid heat capacities have been separated into a subset of 555 OH-free compounds, 123 monoalcohols/monoacids and 119 polyols/polyacids. The standard deviations for Cp(sol,298) were calculated to 23.14 J/mol/K for the first, 21.62 J/mol/K for the second, and 19.75 J/mol/K for the last subset. A discussion of structural and intermolecular effects influencing the heat capacities as well as of some special classes, in particular hydrocarbons, ionic liquids, siloxanes and metallocenes, has been given. In addition, the present method has successfully been extended to enable the prediction of the temperature dependence of the solid and liquid heat capacities in the range between 250 and 350 K.

Welcome to talk about 98-97-5, If you have any questions, you can contact Naef, R or send Email.. HPLC of Formula: C5H4N2O2

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

Name: Pyrazine-2-carboxylic acid. Authors Drozd, KV; Manin, AN; Voronin, AP; Perlovich, GL in ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD published article about in [Drozd, K., V; Manin, A. N.; Voronin, A. P.; Perlovich, G. L.] RAS, GA Krestov Inst Solut Chem, Ivanovo 153045, Russia in 2021, Cited 70. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

The thermophysical characteristics and decomposition of pyrazinoic (POA), dipicolinic (DPA), and quinolinic (QNA) acids have been studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TG) and mass-spectrometry. The transpiration method has been used to measure the vapour pressures as a function of the POA, DPA or QNA temperature. It has been found that QNA remains thermally stable in the solid form up to the temperature of 367.15 K, and further heating causes its decarboxylation and irreversible conversion to nicotinic acid. The standard molar enthalpies, entropies, and Gibbs energies of sublimation for POA, DPA and QNA have been calculated. A comparative study of five calculation schemes for sublimation enthalpy estimation (periodic Density Functional Theory computations (DFT-D3), Quantum Theory of Atoms in Molecules (QTAIM), Gavezzotti’s Coulomb-London-Pauli model (CLP and PIXEL) and CrystalExplorer CE-B3LYP) has been conducted. The sublimation thermodynamic functions of the compounds studied by the correlation method have been estimated. When applied to the objects of this study, the method proved to be a quick, convenient and inexpensive way to evaluate the sublimation thermodynamic functions of molecular crystals using only the melting temperature of the compound. (C) 2020 Elsevier Ltd.

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

Safety of Pyrazine-2-carboxylic acid. In 2019 J MOL STRUCT published article about AB-INITIO CALCULATIONS; SPECTROSCOPIC FT-IR; MOLECULAR DOCKING; VIBRATIONAL-SPECTRA; DNA-BINDING; CRYSTAL-STRUCTURE; DFT CALCULATIONS; DISPERSE DYES; MYCOBACTERIUM-TUBERCULOSIS; ANTIMICROBIAL PROPERTIES in [Maliyappa, M. R.; Keshavayya, J.; Mallikarjuna, N. M.] Kuvempu Univ, Dept PG Studies & Res Chem, Shimoga 577451, Karnataka, India; [Krishna, P. Murali; Shivakumara, N.] MS Ramaiah Inst Technol, Dept Chem, Bengaluru 560054, India; [Sandeep, Telkar] Kuvempu Univ, Dept PG Studies & Res Biotechnol & Bioinformat, Shimoga 577451, Karnataka, India; [Sailaja, Krishnamurty] Natl Chem Lab, Phys & Mat Chem Div, Pune 411008, Maharashtra, India; [Nazrulla, Mohammed Azeezulla] CSIR Cent Electrochem Res Inst, Funct Mat Div, Karaikkudi 630006, Tamil Nadu, India in 2019, Cited 82. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

The present work describes the synthesis of five novel heterocyclic azo dyes (4a-4e) through conventional diazo-coupling reaction of 4, 5, 6, 7-tetrahydro-1, 3-benzothiazole with various coupling compounds at 0-5 degrees C. The chemical structures of the synthesized azo dyes were characterized by both theoretical and experimental techniques. All the synthesized molecules were evaluated for their antioxidant activity by two different techniques such as DPPH and FRAP. The results indicated that all the synthesized compounds proved to be potent antioxidants. The anti-mycobacterial activity of the azo dyes was tested against M. tuberculosis and the compounds 4a and 4e showed higher activity among the tested dyes. The DNA binding studies showed effective intercalation properties between the azo dyes and CT-DNA. Finally, the molecular docking studies indicated a possible interaction of the azo dyes with target receptor RpsA. (C) 2018 Elsevier B.V. All rights reserved.

Safety of Pyrazine-2-carboxylic acid. Welcome to talk about 98-97-5, If you have any questions, you can contact Maliyappa, MR; Keshavayya, J; Mallikarjuna, NM; Krishna, PM; Shivakumara, N; Sandeep, T; Sailaja, K; Nazrulla, MA or send Email.

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

COA of Formula: C5H4N2O2. In 2020 SAUDI J BIOL SCI published article about RIBOSOMAL-PROTEIN S1; MYCOBACTERIUM-TUBERCULOSIS; PNCA; BINDING; IDENTIFICATION; MUTATIONS; DIAGNOSIS; GYRATION; POTENCY; DOCKING in [Khan, Muhammad Tahir] Capital Univ Sci & Technol, Dept Bioinformat & Biosci, Islamabad, Pakistan; [Chinnasamy, Sathishkumar; Wei, Dong-Qing] Shanghai Jiao Tong Univ, State Key Lab Microbial Metab, Sch Life Sci & Biotechnol, Minist Educ, Shanghai 200240, Peoples R China; [Chinnasamy, Sathishkumar; Wei, Dong-Qing] Shanghai Jiao Tong Univ, Joint Lab Int Cooperat Metab & Dev Sci, Minist Educ, Shanghai 200240, Peoples R China; [Wei, Dong-Qing] Peng Cheng Lab, Vanke Cloud City Phase 1 Bldg 8,Xili St, Shenzhen 518055, Guangdong, Peoples R China; [Cui, Zhilei] Shanghai Jiao Tong Univ, Dept Resp Med, XinHua Hosp, Sch Med, Shanghai, Peoples R China; [Irfan, Muhammad] Univ Florida, Dept Microbiol & Cell Sci, Genet Inst, Gainesville, FL 32611 USA; [Irfan, Muhammad] Univ Florida, Inst Food & Agr Sci, Gainesville, FL 32611 USA in 2020, Cited 58. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

Pyrazinamide (PZA) is a component of first-line drugs, active against latent Mycobacterium tuberculosis (MTB) isolates. The prodrug is activated into the active form, pyrazinoic acid (POA) via pncA gene-encoded pyrazinamidase (PZase). Mutations in pncA have been reported, most commonly responsible for PZA-resistance in more than 70% of the resistant cases. In our previous study, we detected many mutations in PZase among PZA-resistance MTB isolates including A46V, H71Y, and D129N. The current study was aimed to investigate the molecular mechanism of PZA-resistance behind mutants (MTs) A46V, H71Y, and D129N in comparison with the wild type (WT) through molecular dynamic (MD) simulation. MTB positive samples were subjected to PZA drug susceptibility testing (DST) against critical concentration (100ug/ml). The resistant samples were subjected to pncA sequencing. Thirty-six various mutations have been observed in the coding region of pncA of PZA-resistant isolates (GenBank accession No. MH461111) including A46V, H71Y, and D129N. The post-simulation analysis revealed a significant variation in MTs structural dynamics as compared to the WT. Root means square deviations (RMSD) and Root means square fluctuation (RMSF) has been found in variation between WT and MTs. Folding effect and pocket volume were altered in MTs when compared with WT. Geometric matching supports the effect of mutation A46V, H71Y, and D129N on PZase structure that may have an insight effect on PZase dynamics, making them vulnerable to convert pro-PZA into active form, POA. In conclusion, the current analyses will provide useful information behind PZA-resistance for better management of drug-resistant TB. (C) 2020 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.

COA of Formula: C5H4N2O2. Welcome to talk about 98-97-5, If you have any questions, you can contact Khan, MT; Chinnasamy, S; Cui, ZL; Irfan, M; Wei, DQ or send Email.

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

I found the field of Chemistry very interesting. Saw the article Pantoprazole Derivatives: Synthesis, Urease Inhibition Assay and In Silico Molecular Modeling Studies published in 2020. Product Details of 98-97-5, Reprint Addresses Balalaie, S (corresponding author), KN Toosi Univ Technol, Peptide Chem Res Ctr, POB 15875-4416, Tehran, Iran.; Balalaie, S (corresponding author), Kermanshah Univ Med Sci, Med Biol Res Ctr, Kermanshah, Iran.. The CAS is 98-97-5. Through research, I have a further understanding and discovery of Pyrazine-2-carboxylic acid

A number of pantoprazole derivatives were synthesized and screened for their urease inhibitory properties. Some of them showed potent inhibitions against jack bean urease. All compounds showed varying degree of IC50 in the range of 25.85 to 181 mu Mol as compared to standard acetohydroxamic acid (AHA) (100 +/- 2.02 mu Mol). Derivatives bearing 5-aryl-1,3,4-oxadiazole ring substitutions (aryl= pyrazyl, pyridyl and phenyl) were found to be more potent inhibitors than AHA and pantoprazole. The most promising compound, 2-((3,4-dimethoxypyridin-2-yl)methylthio)-5-(pyrazin-2-yl)-1,3,4-oxadiazole 12, with IC50 value of 25.85 +/- 1.21 showed remarkable urease inhibition activity. In silico molecular modeling investigation performed to rationalize the possible binding interaction and ADME properties of compounds over the active site of urease enzyme. The induced fit docking study showed that compound 12 interacted with conserved residues His593 and Arg609 located at the mouth of the urease active site flap and are essential for enzyme catalytic activity. These target compounds could be further studied as a lead skeleton for discovery of novel urease inhibitors.

Welcome to talk about 98-97-5, If you have any questions, you can contact Azizian, H; Esmailnejad, A; Vavsari, VF; Mahernia, S; Amanlou, M; Balalaie, S or send Email.. Product Details of 98-97-5

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

Recommanded Product: Pyrazine-2-carboxylic acid. Singh, P; Babu, SA; Aggarwal, Y; Patel, P in [Singh, Prabhakar; Arulananda Babu, Srinivasarao; Aggarwal, Yashika; Patel, Pooja] Indian Inst Sci Educ & Res IISER Mohali, Dept Chem Sci, Sect 81, Manauli Po 140306, Punjab, India published Pd(II)-catalyzed, Picolinamide-aided sp(2) gamma-C-H Functionalization of Phenylglycinol: Access to gamma-C-H Arylated, Alkylated and Halogenated Phenylglycinol Scaffolds in 2021, Cited 68. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5.

We report the Pd(II)-catalyzed picolinamide-aided ortho-C-H arylation-, alkylation-, and halogenation (sp(2) gamma-C-H functionalization) of phenylglycinol substrates. Phenylglycinols are remarkable building blocks and have found different applications in synthetic organic and medicinal chemistry. This work is a contribution towards the expansion of the library of phenylglycinol scaffolds and also substrate scope development by using the Pd(II)-catalyzed bidentate directing group picolinamide-aided C-H activation tactic.

Recommanded Product: Pyrazine-2-carboxylic acid. 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

Authors Hassan, NW; Saudi, MN; Abdel-Ghany, YS; Ismail, A; Elzahhar, PA; Sriram, D; Nassra, R; Abdel-Aziz, MM; El-Hawash, SA in ACADEMIC PRESS INC ELSEVIER SCIENCE published article about MYCOBACTERIUM-TUBERCULOSIS; ANTIMYCOBACTERIAL ACTIVITY; ACID HYDRAZONES; DERIVATIVES; RESISTANCE; DOCKING; DRUGS; GRANULOCYTES; INHIBITORS; PREDICTION in [Hassan, Nayera W.; Saudi, Manal N.; Abdel-Ghany, Yasser S.; Ismail, Azza; Elzahhar, Perihan A.; El-Hawash, Soad A.] Alexandria Univ, Fac Pharm, Dept Pharmaceut Chem, Alexandria 21521, Egypt; [Sriram, Dharmarajan] Birla Inst Technol & Sci Pilani, Med Chem & Drug Discovery Res Lab, Pharm Grp, Hyderabad Campus, Jawahar Nagar 500078, Telangana, India; [Nassra, Rasha] Alexandria Univ, Fac Med, Dept Med Biochem, Alexandria, Egypt; [Abdel-Aziz, Marwa M.] Al Azhar Univ, Reg Ctr Mycol & Biotechnol, Cairo 11759, Egypt in 2020, Cited 84. Product Details of 98-97-5. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

TB continues to be a leading health threat despite the availability of powerful anti-TB drugs. We report herein the design and synthesis of various hybrid molecules comprising pyrazine scaffold and various formerly identified anti-mycobacterial moieties. Thirty-one compounds were screened in vitro for their activity against Mycobacterium tuberculosis H37Rv strain using MABA assay. The results revealed that six compounds (8a, 8b, 8c, 8d, 14b and 18) displayed significant activity against Mtb with MIC values <= 6.25 mu g/ml versus 6.25 mu g/ml for pyrazinamide. The most active compounds were then assessed for their in vitro cytotoxicity against PBMC normal cell line using MTT assay and showed SI > 200. Several in silico studies have been carried out for target fishing of the novel compounds such as shape-based similarity, pharmacophore mapping and inverse docking. Based on this multi-step target fishing study, we suggest that pantothenate synthetase could be the possible target responsible for the action of these compounds. The most active compounds were then successfully docked into the active site of pantothenate synthetase enzyme with favorable binding interactions. In addition, in silico prediction of physicochemical, ADMET and drug-like properties were also determined indicating that compounds 8b, 8c and 8d are promising candidates for the development of new anti-TB agents with enhanced activity and better safety profile.

Product Details of 98-97-5. Welcome to talk about 98-97-5, If you have any questions, you can contact Hassan, NW; Saudi, MN; Abdel-Ghany, YS; Ismail, A; Elzahhar, PA; Sriram, D; Nassra, R; Abdel-Aziz, MM; El-Hawash, SA or send Email.

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

Product Details of 98-97-5. Authors Dumpala, RMR; Das, SK; Ali, M; Boda, A; Kumar, P; Rawat, N; Kumar, A; Ali, SM in PERGAMON-ELSEVIER SCIENCE LTD published article about in [Dumpala, Rama Mohana Rao; Rawat, Neetika] Bhabha Atom Res Ctr, Radiochem Div, Mumbai 400094, Maharashtra, India; [Das, Sourav Kumar; Ali, Manjoor; Kumar, Amit] Bhabha Atom Res Ctr, Radiat Biol & Hlth Sci Div, Mumbai 400094, Maharashtra, India; [Boda, Anil; Ali, Sk Musharaf] Bhabha Atom Res Ctr, Chem Engn Div, Mumbai 400094, Maharashtra, India; [Kumar, Pranaw] Bhabha Atom Res Ctr, Fuel Chem Div, Mumbai 400094, Maharashtra, India in 2021, Cited 78. The Name is Pyrazine-2-carboxylic acid. Through research, I have a further understanding and discovery of 98-97-5

Thorium (Th) exposure to the human beings is a radiochemical hazard and the chelation therapy by suitable drugs is the major prevention approach to deal with. The present studies aimed at usage of pyrazinoic acid (PCA), which is a prodrug to treat tuberculosis, for its usage as decorporating agent for thorium from human body. The present studies provide a comprehensive knowledge on the chemical interaction and biological efficacy of pyrazinoic acid (PCA) for decorporation of Thorium from the human body. The thermodynamic parameters for Th-PCA speciation are determined by both experiment and theory. The potentiometric data analysis and Electro-Spray Ionization Mass Spectrometry (ESI-MS) studies revealed the formation of MLi (i = 1-4) species with the decrease in stepwise stability constants. All the species formations are endothermic reactions and are predominantly entropy-driven. Biological experiments using human erythrocytes, whole blood and normal human lung cells showed cytocompatibility and decorporation ability of PCA for Thorium. Density functional calculations have been carried out to get insights on interaction process at molecular level. The experimental results and theoretical predictions found to be in line with each other. Present findings on complexation of Th by PCA and its evaluation in human cells and blood would further motivate determination of its safety levels and decorporation efficacy in animal models. (C) 2021 Elsevier Ltd. All rights reserved.

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

Authors Alsayed, SSR; Lun, SC; Payne, A; Bishai, WR; Gunosewoyo, H in WILEY published article about in [Alsayed, Shahinda S. R.; Gunosewoyo, Hendra] Curtin Univ, Fac Hlth Sci, Sch Pharm & Biomed Sci, Perth, WA, Australia; [Lun, Shichun; Bishai, William R.] Johns Hopkins Sch Med, Dept Med, Ctr TB Res, Div Infect Dis, Baltimore, MD 21205 USA; [Payne, Alan] Curtin Univ, Sch Mol & Life Sci, Perth, WA, Australia; [Bishai, William R.] Howard Hughes Med Inst, Chevy Chase, MD USA in 2021, Cited 54. 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

Several rationally designed isoniazid (INH), pyrazinamide (PZA) and ciprofloxacin (CPF) derivatives were conveniently synthesized and evaluated in vitro against H37Rv Mycobacterium tuberculosis (M. tb) strain. CPF derivative 16 displayed a modest activity (MIC = 16 mu g/ml) and was docked into the M. tb DNA gyrase. Isoniazid-pyrazinoic acid (INH-POA) hybrid 21a showed the highest potency in our study (MIC = 2 mu g/ml). It also retained its high activity against the other tested M. tb drug-sensitive strain (DS) V4207 (MIC = 4 mu g/ml) and demonstrated negligible cytotoxicity against Vero cells (IC50 >= 64 mu g/ml). Four tested drug-resistant (DR) M. tb strains were refractory to 21a, similar to INH, whilst being sensitive to CPF. Compound 21a was also inactive against two non-tuberculous mycobacterial (NTM) strains, suggesting its selective activity against M. tb. The noteworthy activity of 21a against DS strains and its low cytotoxicity highlights its potential to treat DS M. tb.

Welcome to talk about 98-97-5, If you have any questions, you can contact Alsayed, SSR; Lun, SC; Payne, A; Bishai, WR; Gunosewoyo, H or send Email.. Application In Synthesis of Pyrazine-2-carboxylic acid

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