Category: isoquinoline

Adigun, Rasheed A. published the artcileRational Optimization of Dihydropyrimidinone-Quinoline Hybrids as Plasmodium falciparum Glutathione Reductase Inhibitors, Computed Properties of 598-50-5, the main research area is dihydropyrimidinone quinoline hybrid plasmodium falciparum glutathione reductase inhibitor; Antimalarial agents; Dihydropyrimidinones; Molecular docking; Rational optimization; Resistance reversal.

A series of dihydropyrimidinone-based antimalarial compounds were designed and synthesized based on the previously identified amide-based quinoline hybrids which showed good resistance reversal ability against the resistant strain of Plasmodium falciparum. The aromatic ring on the dihydropyrimidinone of the original hits was exchanged for a Me group to bring the mol. weights below 500 Da and also determine the effect of the aromatic ring count on the resistance reversal ability of the hybrids. Apart from the previously used amide bond, the hybrid linker was also extended to the triazole linker. Although the triazole linker is synthetically easier to access, the use of an amide linker seems to have an activity advantage. The synthesized compounds in addition to the previously identified hits were subjected to mol. docking particularly targeting the orthosteric site of Plasmodium falciparum glutathione reductase (PfGR) protein. The ligand with the best binding interaction was rationally optimized to increase its suitability as a competitive inhibitor against the cofactor of the PfGR. Two of the optimized ligands showed better binding affinities than the cofactor while one of the two ligands displayed hydrophobically packed correlated hydrogen-bond which is very important in maintaining the ligand stability within the protein. In silico ADME predictions of the synthesized compounds indicate that these compounds possess good pharmacokinetic properties.

ChemMedChem published new progress about Antimalarials. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Computed Properties of 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Mambwe, Dickson published the artcileStructure-Activity Relationship Studies Reveal New Astemizole Analogues Active against Plasmodium falciparum In Vitro, Formula: C9H10O3, the main research area is astemizole analog plasmodium falciparum malaria antimalarial.

In the context of drug repositioning and expanding the existing structure-activity relationship around astemizole (AST), a new series of analogs were designed, synthesized, and evaluated for their antiplasmodium activity. Among 46 analogs tested, compounds 21, 30, and 33 displayed high activities against asexual blood stage parasites (PfNF54 IC50 = 0.025-0.043μM), whereas amide compound 46 addnl. showed activity against late-stage gametocytes (stage IV/V; PfLG IC50 = 0.6 ± 0.1μM) and 860-fold higher selectivity over hERG (46, SI = 43) compared to AST. Several analogs displaying high solubility (Sol > 100μM) and low cytotoxicity in the Chinese hamster ovary (SI > 148) cell line have also been identified.

ACS Medicinal Chemistry Letters published new progress about Antimalarials. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Cox, Brian published the artcileEscaping from Flatland: Antimalarial Activity of sp3-Rich Bridged Pyrrolidine Derivatives, COA of Formula: C9H10O3, the main research area is pyrrolidine preparation antimalarial activity.

Synthetic photochem. to generate novel sp3-rich scaffolds and report the design, synthesis, and biol. testing of a diverse series of amides based on the 1-(amino-methyl)-2-benzyl-2-aza-bicyclo[2.1.1]hexane scaffold was utilized . Preliminary antimalarial screening of the library provided promising compounds with activity in the 1-5μM 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.

ACS Medicinal Chemistry Letters published new progress about Antimalarials. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, COA of Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Reginato, Marcelo Mota published the artcileConformational study of the electronic interactions and nitric oxide release potential of new S-nitrosothiols esters derivatives of ibuprofen, naproxen and phenyl acids substituted (SNO-ESTERS): Synthesis, infrared spectroscopy analysis and theoretical calculations, Computed Properties of 104-01-8, the main research area is nitrosothiol ester conformation IR spectra mol structure stabilization energy; Infrared spectroscopy; Natural Bond Orbital; Nitric oxide; Synthesis; S‑Nitrosothiols; Theoretical calculations.

The conformational study on the new S-nitrosothiols esters (SNO-ESTERS): para-substituted (X = H, OMe, Cl and NO2) S-nitrosothiol derivatives 2-methyl-2-(sulfanyl)propyl phenylacetates (R1), 2-(4-isobutylphenyl)propanoate (ibuprofen, R2), and 2-(4-isobutylphenyl)propanoate of 2-methyl-2-(nitrososulfanyl)propyl (naproxen, R3) was performed using IR spectroscopy (IR) in solvents with increasing polarity (CCl4, CH3Cl, and CH3CN), and theor. calculations, to determine the preferential conformer and the potential of these compounds to release nitric oxide (NO). S-Nitrosothiols were synthesized by esterification reactions, using chlorides of the corresponding carboxylic acids, with good yields (~60%). IR results showed that these compounds presented only one conformation, and the exptl. data were supported by the theor. results obtained by d. functional theory (DFT) calculations using the 6311+G (2df, 2p) basis set. The calculations revealed that all S-nitrosothiols presented one preferential anticlinal (ac) geometric conformation, which agrees with the data obtained exptl. in CCl4. These conformers are stabilized by intramol. hydrogen bonds. Examination of the geometry with regard to the R-SNO group revealed that these compounds are preferentially in the trans (anti) conformation. The calculation of the orbital interactions using the Natural Bond Orbital (NBO) method showed that the nO(NO) â†?σ*(S-N) hyper-conjugative interaction increases the S-N bond length. The strong nS â†?π*(NO) interaction and electronic delocalization induces a partial π character to the S-N bond. The weak σS-N bond indicates strong delocalization of the electron pair in O (NO) by the nO(NO) â†?σ*(S-N) interaction, thereby increasing the capacity of NO release from SNO-ESTERS.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about Atomic charge. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Computed Properties of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zelenka, Jan published the artcileFlavinium Catalysed Photooxidation: Detection and Characterization of Elusive Peroxyflavinium Intermediates, Name: 1,3-Dimethoxybenzene, the main research area is peroxyflavinium intermediate detection flavinium photooxidation; flavin; ion spectroscopy; mass spectrometry; peroxy intermediates; photooxidation.

Flavin-based catalysts are photoactive in the visible range which makes them useful in biol. and chem. Herein, we present electrospray-ionization mass-spectrometry detection of short-lived intermediates in photooxidation of toluene catalyzed by flavinium ions (Fl+). Previous studies have shown that photoexcited flavins react with aromatics by proton-coupled electron transfer (PCET) on the microsecond time scale. For Fl+, PCET leads to FlH.+ with the H-atom bound to the N5 position. We show that the reaction continues by coupling between FlH.+ and hydroperoxy or benzylperoxy radicals at the C4a position of FlH.+. These results demonstrate that the N5-blocking effect reported for alkylated flavins is also active after PCET in these photocatalytic reactions. Structures of all intermediates were fully characterized by isotopic labeling and by photodissociation spectroscopy. These tools provide a new way to study reaction intermediates in the sub-second time range.

Angewandte Chemie, International Edition published new progress about Atomic charge. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Name: 1,3-Dimethoxybenzene.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Shayestehpour, Omid published the artcileMolecular Features of Reline and Homologous Deep Eutectic Solvents Contributing to Nonideal Mixing Behavior, Product Details of C2H6N2O, the main research area is reline choline chloride urea derivative nonideal mixing MD simulation; deep eutectic solvents reline urea derivative nonideal mixing MD.

Deep eutectic solvents based on choline chloride and a series of urea derivatives are studied by mol. dynamics simulations with the aim to identify mol. features contributing to nonideal mixing behavior of these compounds In case of reline, a mixture of choline chloride and urea in 1:2 ratio, urea mols. provide sufficient hydrogen bond donor sites to take up the chloride anions into their polar network. Replacing any of the hydrogen atoms of urea by a Me group strongly pushes the anion to interact with these alkyl chains, resulting in a pos. deviation of the activity coefficients of choline chloride compared to reline. Furthermore, the oxygen atom of urea can interact with the nitrogen atom of the cation. This enables the chloride anion to move off-center of the cation toward the hydrogen atom of its hydroxyl group, possessing stronger directional Coulomb interactions than the nitrogen atom of the cation. The substitution of urea’s hydrogen atoms in cis position to the carbonyl group as in 1,3-dimethylurea, pushes the newly introduced nonpolar alkyl chains toward the nitrogen atom of the cation. This effect can be responsible for the exptl. observed increase of the activity coefficient of the urea derivative compared to urea. Addnl., indications for formation of nonpolar domains within the liquid and, thus, nanoscale segregation is visible as soon as one hydrogen atom of urea is replaced by an alkyl group.

Journal of Physical Chemistry B published new progress about Atomic charge. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Product Details of C2H6N2O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Morais, Sergio Alberto published the artcileAccounting for the dissociating properties of organic chemicals in LCIA: An uncertainty analysis applied to micropollutants in the assessment of freshwater ecotoxicity, Name: Diatrizoic Acid, the main research area is dissociating property organic life cycle assessment; uncertainty analysis micropollutant assessment freshwater ecotoxicity.

In life cycle impact assessment (LCIA) models, the sorption of the ionic fraction of dissociating organic chems. is not adequately modeled because conventional non-polar partitioning models are applied. Therefore, high uncertainties are expected when modeling the mobility, as well as the bioavailability for uptake by exposed biota and degradation, of dissociating organic chems. Alternative regressions that account for the ionized fraction of a mol. to estimate fate parameters were applied to the USEtox model. The most sensitive model parameters in the estimation of ecotoxicol. characterization factors (CFs) of micropollutants were evaluated by Monte Carlo anal. in both the default USEtox model and the alternative approach. Negligible differences of CFs values and 95% confidence limits between the two approaches were estimated for direct emissions to the freshwater compartment; however the default USEtox model overestimates CFs and the 95% confidence limits of basic compounds up to 3 and 4 orders of magnitude, resp., relatively to the alternative approach for emissions to the agricultural soil compartment. For 3 emission scenarios, LCIA results show that the default USEtox model overestimates freshwater ecotoxicity impacts for the emission scenarios to agricultural soil by one order of magnitude, and larger confidence limits were estimated, relatively to the alternative approach.

Journal of Hazardous Materials published new progress about Biodegradation. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Name: Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kormos, Jennifer Lynne published the artcileBiotransformation of Selected Iodinated X-ray Contrast Media and Characterization of Microbial Transformation Pathways, Formula: C11H9I3N2O4, the main research area is biotransformation iodinated Xray contrast media characterization microbial transformation pathway.

Iodinated x-ray contrast media (ICM) are commonly detected in the aquatic environment at concentrations up to the low μg/L range. The biotransformation of selected ICM (diatrizoate, iohexol, iomeprol, and iopamidol) in aerobic soil-water and river sediment-water batch systems was studied. Microbial transformation pathways are proposed. Diatrizoate, an ionic ICM, was not biotransformed, while 3 nonionic ICM were transformed into several biotransformation products (TPs) at pH 7. Iohexol and iomeprol were biotransformed to 11 and 15 TPs, resp., while 8 TPs were detected for iopamidol. Since seven of the TPs detected during biotransformation had not been previously identified, mass fragmentation experiments were completed to elucidate the chem. structures. Oxidation of primary alc. moieties, cleavage of the N-C bonds (i.e., deacetylation and removal of hydroxylated propanoic acids), and oxidative decarboxylation are potential reactions that can explain the formation of the identified TPs. Iohexol and iomeprol had similar biotransformation rates, while iopamidol was biotransformed slower and to a lesser extent. A LC tandem MS method confirmed the presence of ICM TPs in aqueous environmental samples. Fifteen of the ICM TPs were even detected in drinking water with concentrations â‰?20 ng/L.

Environmental Science & Technology published new progress about Biodegradation. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Formula: C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhang, Jun published the artcileiMatch: A retention index tool for analysis of gas chromatography-mass spectrometry data, Category: isoquinoline, the main research area is iMatch retention index tool gas chromatog mass spectrometry data.

A method was developed to employ National Institute of Standards and Technol. (NIST) 2008 retention index database information for mol. retention matching via constructing a set of empirical distribution functions (DFs) of the absolute retention index deviation to its mean value. The effects of different exptl. parameters on the mols.’ retention indexes were first assessed. The column class, the column type, and the data type have significant effects on the retention index values acquired on capillary columns. However, the normal alkane retention index (Inorm) with the ramp condition is similar to the linear retention index (IT), while the Inorm with the isothermal condition is similar to the Kovats retention index (I). As for the Inorm with the complex condition, these data should be treated as an addnl. group, because the mean Inorm value of the polar column is significantly different from the IT. Based on this anal., nine DFs were generated from the grouped retention index data. The DF information was further implemented into a software program called iMatch. The performance of iMatch was evaluated using exptl. data of a mixture of standards and metabolite extract of rat plasma with spiked-in standards About 19% of the mols. identified by ChromaTOF were filtered out by iMatch from the identification list of electron ionization (EI) mass spectral matching, while all of the spiked-in standards were preserved. The anal. results demonstrate that using the retention index values, via constructing a set of DFs, can improve the spectral matching-based identifications by reducing a significant portion of false-positives.

Journal of Chromatography A published new progress about Blood analysis. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Quach, Alex published the artcileThe Application of Dextran Sedimentation as an Initial Step in Neutrophil Purification Promotes Their Stimulation, due to the Presence of Monocytes, HPLC of Formula: 117-96-4, the main research area is neutrophil Purification dextran sedimentation monocyte.

The purification of human neutrophils for in vitro studies is challenging as they are easily activated through ex vivo manipulations. The technique of erythrocyte sedimentation combined with d. gradient centrifugation remains widely practiced and was the subject of this study. Since in the sedimentation step the leukocytes are incubated with dextran, we have raised the likelihood that cellular activation would occur with mediator release leading to neutrophil activation. By comparing the activity of neutrophils purified from whole blood by the classical 2-step method of dextran sedimentation followed by low-d. Ficoll-Hypaque (1.077 g/mL) medium, and the 1-step high-d. Ficoll-Hypaque (1.114 g/mL) gradient centrifugation, we found that neutrophils from the 2-step method had a significant increase in cell surface CD11b expression and CD62L shedding and a marked increase in adhesion. Decreased random migration and chemotaxis and raised baseline oxidative burst activity were also observed The effect was not specific to dextran, as using Ficoll for erythrocyte sedimentation replicated the elevated neutrophil adherence. Through the depletion of monocytes, lymphocytes, and platelets prior to sedimentation, we deduced that monocytes were responsible for the neutrophil activation. Our findings suggest that care needs to be exercised in choosing the method of neutrophil purification for functional studies.

Journal of Immunology Research published new progress about Blood platelet. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, HPLC of Formula: 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem