Month: December 2022

Liu, Zhi published the artcileROS-triggered degradable iron-chelating nanogels: Safely improving iron elimination in vivo, Related Products of amides-buliding-blocks, the publication is Journal of Controlled Release (2018), 84-93, database is CAplus and MEDLINE.

Iron-mediated generation of highly toxic Reactive Oxygen Species (ROS) plays a major role in the process leading to iron overload-related diseases. The long-term s.c. administration of Deferoxamine (DFO) is currently clin.-approved to improve patient symptoms and survival. However, non-specific toxicity and short circulation times of the drug in humans often leads to poor patient compliance. Herein, thioketal-based ROS-responsive polymeric nanogels containing DFO moieties (rNG-DFO) were designed to chelate iron and to degrade under oxidative stimuli into fragments <10 nm to enhance excretion of iron-bound chelates. Serum ferritin levels and iron concentrations in major organs of IO mice decreased following treatment with rNG-DFO, and fecal elimination of iron-bound chelates increased compared to free DFO. Furthermore, rNG-DFO decreased iron mediated oxidative stress levels in vitro and reduced iron-mediated inflammation in the liver of IO mice. The study confirms that ROS-responsive nanogels may serve as a promising alternative to DFO for safer and more efficient iron chelation therapy.

Journal of Controlled Release published new progress about 1869-45-0. 1869-45-0 belongs to amides-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is 2,2,2-Trifluoro-N-(2-mercaptoethyl)acetamide, and the molecular formula is C4H6F3NOS, Related Products of amides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Abdelkader, Elwy H. published the artcileGenetic Encoding of N⁶-(((Trimethylsilyl)methoxy)carbonyl)-L-lysine for NMR Studies of Protein-Protein and Protein-Ligand Interactions, Related Products of amides-buliding-blocks, the publication is Journal of the American Chemical Society (2021), 143(2), 1133-1143, database is CAplus and MEDLINE.

Trimethylsilyl (TMS) groups present outstanding NMR probes of biol. macromols. as they produce intense singlets in ¹H NMR spectra near 0 ppm, where few other proton resonances occur. We report a system for genetic encoding of N⁶-(((trimethylsilyl)methoxy)carbonyl)-L-lysine (TMSK) for site-specific incorporation into proteins. The system is based on pyrrolysyl-tRNA synthetase mutants, which deliver proteins with high yield and purity in vivo and in cell-free protein synthesis. As the TMS signal can readily be identified in 1D ¹H NMR spectra of high-mol. weight systems without the need of isotopic labeling, TMSK delivers an excellent site-specific NMR probe for the study of protein structure and function, which is both inexpensive and convenient. We demonstrate the utility of TMSK to detect ligand binding, measure the rate of conformational change, and assess protein dimerization by paramagnetic relaxation enhancement. In addition, we present a system for dual incorporation of two different unnatural amino acids (TMSK and O-tert-butyl-tyrosine) in the same protein in quantities sufficient for NMR spectroscopy. Close proximity of the TMS and tert-Bu groups was readily detected by nuclear Overhauser effects.

Journal of the American Chemical Society published new progress about 2418-95-3. 2418-95-3 belongs to amides-buliding-blocks, auxiliary class Chiral,Carboxylic acid,Amine,Aliphatic hydrocarbon chain,Ester,Amino acide derivatives, name is H-Lys(Boc)-OH, and the molecular formula is C11H22N2O4, Related Products of amides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Jiang, Qihui published the artcileActivation of hydrogen peroxide by graphite supported H₂SO₄-CeO₂ for isoniazid degradation under neutral pH, SDS of cas: 1453-82-3, the publication is Water Science & Technology (2022), 85(7), 2051, database is CAplus.

Graphite felt (GF) supported cerium oxide (CeO₂) composite with sulfation pretreatment (H₂SO₄-CeO₂/GF) was prepared by the impregnation method and employed as the catalyst to activate H₂O₂ for degradation of isoniazid (INH). The obtained samples were characterized by X-ray diffraction (XRD), Fourier transform IR spectroscopy (FTIR), SEM (SEM) and X-ray photoelectron spectrum (XPS). The results showed that H₂SO₄-CeO₂/GF had good properties in activating H₂O₂ for the degradation of INH. The INH removal was about 89.4% in 120 min under the following conditions: H₂O₂ 2.94 mM, H₂SO₄-CeO₂/GF 2.6 g/L, INH 10 mg/L, initial pH at 6.8 and temperature at 25°C. The effects of some reaction parameters, including initial H₂O₂ concentration, initial INH concentration, initial pH value, the catalyst dosage and reaction temperature, on INH degradation were investigated. On the basis of mechanism study and intermediate anal., the possible degradation pathway of INH was proposed. Besides, effective degradation of methyl orange (MO) and norfloxacin (NOF) also confirmed the high activity of H₂SO₄-CeO₂/GF in activation of H₂O₂. The H₂SO₄-CeO₂/GF was relatively stable, showing good application prospects.

Water Science & Technology published new progress about 1453-82-3. 1453-82-3 belongs to amides-buliding-blocks, auxiliary class Pyridine,Amine,Amide, name is Isonicotinamide, and the molecular formula is C6H6N2O, SDS of cas: 1453-82-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Thonsgaard, Simon published the artcileCirculating Concentrations of C-Type Natriuretic Peptides Increase with Sacubitril/Valsartan Treatment in Healthy Young Men., SDS of cas: 137862-53-4, the publication is Clinical chemistry (2022), 68(5), 713-720, database is MEDLINE.

BACKGROUND: C-type natriuretic peptide (CNP) is a cardioprotective peptide with high affinity for the ectoenzyme neutral endopeptidase (neprilysin). We aimed to determine whether angiotensin receptor-neprilysin inhibitor treatment acutely affects circulating concentrations of bioactive CNP and its molecular amino-terminal precursor (NT-proCNP). METHODS: We included 9 and 10 healthy young men in 2 randomized crossover trials with sacubitril/valsartan vs control (Trial 1) and sacubitril/valsartan and sitagliptin vs sitagliptin (Trial 2). The participants were randomized to a single dose of sacubitril/valsartan (194/206 mg) or control at the first visit 30 min prior to a standardized meal intake. We obtained blood samples at 12 time points over 5 h and measured plasma concentrations of NT-proCNP in both trials and CNP in Trial 2. RESULTS: NT-proCNP concentrations increased 3.5 h after sacubitril/valsartan treatment, and at 4.5 h concentrations were 42% and 65% higher compared with control in Trial 1 and Trial 2, respectively. The total area under the curve (tAUC)15-270 min was 22% higher (P = 0.007) in Trial 1 and 17% higher with treatment (P = 0.017) in Trial 2. Concentrations of bioactive CNP followed a similar temporal pattern with an increase of 93% at 4.5 h and a 31% higher tAUC15-270 min compared with control (P = 0.001) in Trial 2. CONCLUSIONS: Sacubitril/valsartan augments circulating concentrations of both bioactive CNP and NT-proCNP in healthy young men. The increase in bioactive CNP is most likely caused by de novo synthesis and secretion rather than diminished breakdown through neprilysin inhibition.ClinicalTrials.gov registration number NCT03717688.

Clinical chemistry published new progress about 137862-53-4. 137862-53-4 belongs to amides-buliding-blocks, auxiliary class GPCR/G Protein,Angiotensin Receptor, name is (S)-2-(N-((2′-(1H-Tetrazol-5-yl)-[1,1′-biphenyl]-4-yl)methyl)pentanamido)-3-methylbutanoic acid, and the molecular formula is C12H17NS2, SDS of cas: 137862-53-4.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Spiegelman, Nicole A. published the artcileDirect Comparison of SIRT2 Inhibitors: Potency, Specificity, Activity-Dependent Inhibition, and On-Target Anticancer Activities, COA of Formula: C25H34N4O2S, the publication is ChemMedChem (2018), 13(18), 1890-1894, database is CAplus and MEDLINE.

Sirtuin inhibitors have attracted much interest due to the involvement of sirtuins in various biol. processes. Several SIRT2-selective inhibitors have been developed, and some exhibit anticancer activities. To facilitate the choice of inhibitors in future studies and the development of better inhibitors, the authors directly compared several reported SIRT2-selective inhibitors: AGK2, SirReal2, Tenovin-6, and TM. In vitro, TM is the most potent and selective inhibitor, and only TM could inhibit the demyristoylation activity of SIRT2. SirReal2, Tenovin-6, and TM all showed cytotoxicity in cancer cell lines, with Tenovin-6 being the most potent, but only TM showed cancer-cell-specific toxicity. All four compounds inhibited the anchorage-independent growth of HCT116 cells, but the effect of TM was most significantly affected by SIRT2 overexpression, suggesting that the anticancer effect of TM depends more on SIRT2 inhibition. These results not only provide useful guidance about choosing the right SIRT2 inhibitor in future studies, but also suggest general practices that should be followed for small-mol. inhibitor development activities.

ChemMedChem published new progress about 1011557-82-6. 1011557-82-6 belongs to amides-buliding-blocks, auxiliary class Epigenetics,Sirtuin, name is 4-(tert-Butyl)-N-((4-(5-(dimethylamino)pentanamido)phenyl)carbamothioyl)benzamide, and the molecular formula is C14H12N2S, COA of Formula: C25H34N4O2S.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Ferretti, Valeria published the artcileA structural study of new potent and selective antagonists to the A2B adenosine receptor, Product Details of C27H29N5O5, the publication is Acta Crystallographica, Section B: Structural Science (2005), B61(5), 569-576, database is CAplus and MEDLINE.

Xanthines, including the natural derivatives theophylline and caffeine, are non-selective antagonists of adenosine. They are able to bind with good affinity to all four adenosine-receptor subtypes A1, A2A, A2B and A3. To develop new drugs with few side effects, over the last few years many efforts have been devoted to the discovery of new adenosine antagonists with enhanced selectivity properties. The present paper reports the crystal structures of five new xanthinic derivatives, which display different affinities and selectivity properties towards the A2B receptor. Besides the crystallog. study, a structural comparison has been made with the calculated geometry of other xanthinic derivatives which are reported to have similar biol. characteristics to understand the structural features controlling their affinity capabilities and selectivity. This structural comparison has been interpreted in the light of a recently published study on the binding of N-benzo[1,3]-dioxol-5-yl-2-[5-(2,6-dioxo-1,3-dipropyl-2,3,6,9-tetrahydro-1H-purin-8-yl)-1-methyl-1-H-pyrazol-3-iloxy]-acetamide to a model of the A2B receptor, which shows the most interesting affinity and selectivity properties.

Acta Crystallographica, Section B: Structural Science published new progress about 264622-53-9. 264622-53-9 belongs to amides-buliding-blocks, auxiliary class GPCR/G Protein,Adenosine Receptor, name is N-(4-Acetylphenyl)-2-(4-(2,6-dioxo-1,3-dipropyl-2,3,6,9-tetrahydro-1H-purin-8-yl)phenoxy)acetamide, and the molecular formula is C27H29N5O5, Product Details of C27H29N5O5.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Dey, Dhananjay published the artcileCrystal and molecular structure of 2-amino-3-ethylcarbamoyl-4-methyl-5-ethoxycarbonylthiophene, COA of Formula: C5H8N2O, the publication is Crystal Structure Theory and Applications (2012), 1(3), 92-96, 5 pp., database is CAplus.

The crystal and mol. structure of 2-amino-3-ethylcarbamoyl-4-methyl-5-ethoxycarbonylthiophene was determined from single crystal X-ray diffraction data. The primary focus was to investigate the mol. geometry of this compound in the solid state along with the associated intermol. and intramol. hydrogen bonding and related weak interactions present in this mol. This compound crystallized in the monoclinic space group P2₁/c with cell parameters: a = 8.1344(3) Å, b = 13.7392(4) Å, c = 11.4704(4) Å, β = 100.769(2)° , V = 1259.36(7) ų, D = 1.352 g·cm^-3, Z = 4. The mol. geometry was stabilized by intramol. N-H···O=C and C-H···O interactions along with intermol. C-H···N and C-H···O interactions which contribute towards the stability of the crystal packing.

Crystal Structure Theory and Applications published new progress about 15029-36-4. 15029-36-4 belongs to amides-buliding-blocks, auxiliary class Nitrile,Amine,Aliphatic hydrocarbon chain,Amide, name is 2-Cyano-N-ethylacetamide, and the molecular formula is C5H8N2O, COA of Formula: C5H8N2O.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Ghorbani, Fatemeh published the artcileSynthesis and Characterization of Pine-cone Derived Carbon-based Solid Acid: a Green and Recoverable Catalyst for the Synthesis of Pyrano_ pyrazole, Amino-benzochromene, Amidoalkyl Naphthol and Thiazolidinedione Derivatives, Formula: C2H4ClNO, the publication is Letters in Organic Chemistry (2021), 18(1), 66-81, database is CAplus.

In this report, SO₃H-functionalized carbon nanoparticles (Pine-SO₃H) with high acid d. was synthesized by the thermal treatment of sulfuric acid with pine-cone as carbon-based at 180°C in a sealed autoclave in a one-step procedure. The resulted nanocatalyst was characterized by FT-IR, TGA, XRD, FE-SEM and elemental anal. (EA). The result of characterization showed that the carbon-based acid is amorphous with polycyclic aromatic carbon sheets attached plentiful -OH, -COOH, and -SO₃H groups. The catalytic activities of pine-SO₃H was investigated in the highly efficient synthesis of pyrano[2,3-c] pyrazole, amino-benzochromenes, amidoalkyl naphthol and 5-arylidene-2,4-thiazolidinedione derivatives The application of pine-SO₃H in the synthesis offered several advantages such as simple procedure with an easy work-up, recoverable catalyst, mild condition, eco-friendliness, excellent yields, short reaction times and use of an inexpensive catalyst.

Letters in Organic Chemistry published new progress about 79-07-2. 79-07-2 belongs to amides-buliding-blocks, auxiliary class Chloride,Amine,Aliphatic hydrocarbon chain,Amide,Inhibitor, name is 2-Chloroacetamide, and the molecular formula is C2H4ClNO, Formula: C2H4ClNO.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Khalaji, Mehrnaz published the artcileVirtual Cocrystal Screening Methods as Tools to Understand the Formation of Pharmaceutical Cocrystals-A Case Study of Linezolid, a Wide-Range Antibacterial Drug, Safety of Isonicotinamide, the publication is Crystal Growth & Design (2021), 21(4), 2301-2314, database is CAplus.

Exptl. mechanochem. screening of cocrystals with linezolid (LIN) resulted in the formation of six new crystal phases, including three neat cocrystals and three cocrystal hydrates, in addition to seven previously described cocrystals. In an attempt to understand the factors governing the formation of these phases, different exptl. conditions of the mechanochem. reactions (polymorphic forms of LIN and presence of different solvents to create liquid-assisted grinding conditions) were tested and the results were compared with the predictions from three commonly used virtual cocrystal screening tools: mol. complementarity, hydrogen bond propensity, and mol. electrostatic potential maps. It is shown that these three methods can be used to help understand a mol.’s preferences to form cocrystals with particular coformers. The influence of mol. conformation on the outcome of the predictions is also evaluated. A comparison between the prediction methods indicates that while considering a set of similar coformers, the approach based on mol. electrostatic potential maps seems to be more consistent with the exptl. results than mol. complementarity and hydrogen bond propensity tools. Instead, these two latter approaches are recommended at the early stages of coformer selection. In addition, intermol. energy contribution (lattice energy) to the total energy of crystal forms of coformers was found to be indicative of the feasibility of cocrystal formation in the case of coformers capable of forming similar supramol. synthons.

Crystal Growth & Design published new progress about 1453-82-3. 1453-82-3 belongs to amides-buliding-blocks, auxiliary class Pyridine,Amine,Amide, name is Isonicotinamide, and the molecular formula is C6H6N2O, Safety of Isonicotinamide.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Rodrigues, Debora Munhoz published the artcileSynthesis, antitumor activity and in silico analyses of amino acid derivatives of artepillin C, drupanin and baccharin from green propolis, Synthetic Route of 2418-95-3, the publication is Bioorganic & Medicinal Chemistry (2021), 116372, database is CAplus and MEDLINE.

Breast cancer has the highest incidence and mortality in females, while prostate cancer has the second-highest incidence in males. Studies have shown that compounds from Brazilian green propolis have antitumor activities and can selectively inhibit the AKR1C3 enzyme, overexpressed in hormone-dependent prostate and breast tumors. Thus, in an attempt to develop new cytotoxic inhibitors against these cancers, three prenylated compounds, artepillin C, drupanin and baccharin, were isolated from green propolis to synthesize new derivatives via coupling reactions with different amino acids. All obtained derivatives were submitted to antiproliferative assays against four cancer cells (MCF-7, MDA MB-231, PC-3, and DU145) and two normal cell lines (MCF-10A and PNT-2) to evaluate their cytotoxicity. In general, the best activity was observed for compound 6e, derived from drupanin, which exhibited half-maximal inhibitory concentration (IC₅₀) of 9.6 ± 3 μM and selectivity index (SI) of 5.5 against MCF-7 cells. In silico studies demonstrated that these derivatives present coherent docking interactions and binding modes against AKR1C3, which might represent a possible mechanism of inhibition in MCF-7 cells.

Bioorganic & Medicinal Chemistry published new progress about 2418-95-3. 2418-95-3 belongs to amides-buliding-blocks, auxiliary class Chiral,Carboxylic acid,Amine,Aliphatic hydrocarbon chain,Ester,Amino acide derivatives, name is H-Lys(Boc)-OH, and the molecular formula is C11H22N2O4, Synthetic Route of 2418-95-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics