Day: December 1, 2022

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

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

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

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

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

Meyers, Marvin J. published the artcile4-Aryl Pyrrolidines as Novel Orally Efficacious Antimalarial Agents. Part 2: 2-Aryl-N-(4-arylpyrrolidin-3-yl)acetamides, Formula: C9H10O3, the main research area is aryl pyrrolidinyl acetamide derivative preparation oral malaria.

Malaria is caused by infection from the Plasmodium parasite and kills hundreds of thousands of people every year. Emergence of new drug resistant strains of Plasmodium demands identification of new drugs with novel chemotypes and mechanisms of action. As a follow up to our evaluation of 4-aryl-N-benzylpyrrolidine-3-carboxamides as novel pyrrolidine-based antimalarial agents, we describe herein the structure-activity relationships of the reversed amide homologues 2-aryl-N-(4-arylpyrrolidin-3-yl)acetamides. Unlike their carboxamide homologues, acetamide pyrrolidines do not require a third chiral center to be potent inhibitors of P. falciparum and have good pharmacokinetic properties and improved oral efficacy in a mouse model of malaria. Compound (-)-32a (CWHM-1552) has an in vitro IC50 of 51 nM in the P. falciparum 3D7 assay and an in vivo ED90 of <10 mg/kg/day and ED99 of 30 mg/kg/day in a murine P. chabaudi model. Remarkably, the absolute stereochem. preference for this acetamide series (3S,4R) is opposite of that determined for the homologous carboxamide series. Lead compounds for this class have modest affinities for the hERG channel and inhibit CYP 3A4. Addnl. optimization is needed in order to eliminate these undesired properties from this otherwise promising series of antimalarial compounds 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

Jarrahpour, Aliasghar published the artcileDiastereoselective synthesis of potent antimalarial cis-β-lactam agents, SDS of cas: 86-51-1, the main research area is lactam preparation diastereoselective antimalarial anticancer activity; 2-Azetidinones; Antimalarial activity; N-(2-aminoethyl) β-lactams; P. falciparum; Staudinger; tert-butyl carbamate.

Fifteen novel β-lactams bearing N-Et tert-Bu carbamate group I (R1 = 4-chlorophenyl, 2-phenylethenyl, 3-methoxyphenyl, etc.; R2 = C6H5O, CH3O) and fifteen N-(2-aminoethyl) βlactams II were synthesized by [2 + 2] ketene-imine cycloaddition reaction (Staudinger). The cycloaddition reaction was found to be totally diastereoselective leading exclusively to the formation of cis-β-lactam derivatives These newly synthesized β-lactams I, II were evaluated for their antimalarial activity against p. falciparum K14 resistant strain and showed good to excellent EC50 values. Among the thirty β-lactams tested, I (R1 = naphthalen-2-yl, R2 = C6H5O), II (R1 = 4-chlorophenyl, R2 = C6H5O; R1 = 2-phenylethenyl, R2 = C6H5O) showed IC50 < 20 μM while I (R1 = 4-nitrophenyl, R2 = C6H5O; R1 = 2-(4-nitrophenyl)ethenyl, R2 = C6H5O; R1 = 3-methoxyphenyl, R2 = C6H5O; R1 = Ph, R2 = C6H5O; R1 = 3-bromophenyl, R2 = C6H5O; R1 = 2,3-dimethoxyphenyl, R2 = C6H5O; R1 = 3-nitrophenyl, R2 = C6H5O), II (R1 = 4-methylphenyl, R2 = C6H5O; R1 = 3-bromophenyl, R2 = C6H5O; R1 = naphthalen-2-yl, R2 = C6H5O) exhibited IC50 <50. Compounds I (R1 = 2-phenylethenyl, R2 = C6H5O; R1 = naphthalen-2-yl, R2 = C6H5O) were examined for their anticancer properties against K562 Leukemia cell line. Compounds R1CH=NCH2CH2NHC(O)OC(CH3)3, I, II, were tested against S. aureus, E. coli, C. albicans and showed no activity below 125 μg/mL. Iranian Journal of Pharmaceutical Research published new progress about Antimalarials. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, SDS of cas: 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Charris, Jaime E. published the artcileAntimalarial, antiproliferative, and apoptotic activity of quinoline-chalcone and quinoline-pyrazoline hybrids. a dual action, Name: 2,3-Dimethoxybenzaldehyde, the main research area is neoplasm antitumor malaria antimalarial Plasmodium quinoline chalcone pyrazoline.

A series of quinoline-chalcone (E)-1-[3 or 4-(7-chloroquinolin-4-ylamino) phenyl]-3-(Ph substituted) prop-2-ene-1-one (4, 5), and quinoline-pyrazoline hybrids 7-Chloro-N-[3 or 4-(4,5-dihydro-5-(phenyl-substituted)-1H-pyrazol-3-yl] phenyl) quinoline-4-amine (6, 7) were synthesized with the aim of achieving an antimalarial and anticancer dual action. Most of the compounds showed significant inhibition (%>80) of β-hematin formation. The existing structures were tested in vivo as potential antimalarials in mice infected with P. berghei ANKA, chloroquine susceptible strain. Some of the compounds exhibited antimalarial activity comparable to that of chloroquine. Moreover, the compounds induce cell death on two human cancer cell lines (Jurkat E6.1 and HL60) without affecting the primary culture of human lymphocytes. Flow cytometry anal. confirmed the increase in apoptotic cell death after 24 h. Based on the structural anal., these quinoline hybrids represent new compounds potentially useful for malaria end leukemia treatments.

Medicinal Chemistry Research published new progress about Antimalarials. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Name: 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kurtanovic, Nezrina published the artcileHuman estrogen receptor α antagonists, part 2: Synthesis driven by rational design, in vitro antiproliferative, and in vivo anticancer evaluation of innovative coumarin-related antiestrogens as breast cancer suppressants, HPLC of Formula: 104-01-8, the main research area is coumarin preparation anticancer antiestrogen ER alpha antagonist pharmacokinetic; Breast cancer; Coumarin-based ERα antagonists; In vitro antiproliferative evaluation; In vivo anticancer evaluation; Synthesis.

New twelve in silico designed coumarin-based ERα antagonists were synthesized and confirmed as selective ERα antagonists, showing potencies ranging from single-digit nanomolar to picomolar. The hits were confirmed as selective estrogen receptor modulators and validated as antiproliferative agents using MCF-7 breast cancer cell lines exerting from picomolar to low nanomolar potency, at the same time showing no agonistic activity within endometrial cell lines. Their mechanism of action was inspected and revealed to be through the inhibition of the Raf-1/MAPK/ERK signal transduction pathway, preventing hormone-mediated gene expression on either genomic direct or genomic indirect level, and stopping the MCF-7 cells proliferation at G0/G1 phase. In vivo experiments, by means of the per os administration to female Wistar rats with pre-induced breast cancer, distinguished six derivatives, 3DQ-4a, 3DQ-2a, 3DQ-1a, 3DQ-1b, 3DQ-2b, and 3DQ-3b, showing remarkable potency as tumor suppressors endowed with optimal pharmacokinetic profiles and no significant histopathol. profiles. The presented data indicate the new compounds as potential candidates to be submitted in clin. trials for breast cancer therapy.

European Journal of Medicinal Chemistry published new progress about Antiestrogens. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, HPLC of Formula: 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Song, Xinjian published the artcileA highly specific and ultrasensitive probe for the imaging of inflammation-induced endogenous hypochlorous acid, Safety of 4-Methoxy-N-methylaniline, the main research area is two photon 14fluorescence imaging inflammation induced hypochlorous acid.

A turn-on two-photon fluorescent probe HCA-Green (I) for hypochlorous acid (HOCl) was synthesized using 4-methylamino-1,8-naphthalimide (MNA) as a two-photon fluorophore and p-hydroxyaniline as a leaving-recognition domain. Both the probe and the fluorophore were studied under one- and two-photon excitation modes. The fluorescence intensity of the probe was enhanced by �29-fold and �93-fold under one-photon and two-photon excitation, resp., after reacting with HOCl. A maximal two-photon action cross-section of 50 GM was obtained under excitation at 810 nm. The probe exhibited high sensitivity with a detection limit of 42.3 nM, as well as high selectivity, low cytotoxicity, and good photostability. Two-photon microscopy (TPM) was conducted to visualize HOCl levels in living cells and tissues. The production of endogenous HOCl induced by lipopolysaccharide-mediated inflammation was successfully monitored with this probe.

Analyst (Cambridge, United Kingdom) published new progress about Animal tissue. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Safety of 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem