Day: December 6, 2022

Chen, Jiangyan published the artcileApplication of UHPLC-Q-TOF MS based untargeted metabolomics reveals variation and correlation amongst different tissues of Eucommia ulmoides Oliver, Recommanded Product: 4-Methoxyphenylacetic acid, the main research area is metabolomic variation Eucommia liquid chromatog mass spectrometry.

The biol. function of Eucommia ulmoides Oliver (EU) is related to its metabolites. However, due to the complexity of distribution of metabolites in different tissues, currently, the comprehensive information anal. on metabolome of EU has been limited. In this study, we analyzed the components of leaves, seeds and barks of EU by using ultra high-performance liquid chromatog.-tandem time-of-flight mass spectrometer (UHPLC-Q-TOF MS) untargeted metabolomics before 2373 metabolites were identified in total. By using Principal Component Anal. (PCA), Partial Least Square Discriminant Anal. (PLS-DA) and other multivariate statistical anal. methods, there were 116 metabolites expressing differently in all samples. The result showed that the metabolic composition of leaves was similar to that of barks and there still existed significant differences amongst different tissues in HCA anal. Besides, the heatmap of differential metabolites also showed the higher concentrations of organic acids and derivatives, lipids and lipid-like mols. in seeds compared to leaves and barks. Furthermore, we detected 13,456 metabolites-metabolites correlations and determined 1098 metabolic pairs which resulted in significant correlation by Pearsons correlation anal. At last, all detected metabolites were annotated in KEGG and 966 of them had KEGG ID. After enrichment anal., 311 metabolites were mapped in 168 pathways and 26 of these pathways had apparent influence in the metabolic differences amongst different parts of EU. This work provides the first comprehensive metabolomic of EU, which will provide theor. basis for the separation and identification of medicinal activities of EU and potentially help advance studies in EU metabolic engineering.

Microchemical Journal published new progress about Eucommia ulmoides. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Recommanded Product: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ullah, Sultan published the artcileThe tyrosinase-inhibitory effects of 2-phenyl-1,4-naphthoquinone analogs: importance of the (E)-β-phenyl-α,β-unsaturated carbonyl scaffold of an endomethylene type, Related Products of isoquinoline, the main research area is phenylnaphthoquinone endomethylene synthesis tyrosinase skin whitening melanogenesis.

In order to investigate the effect of the (E)-β-phenyl-α,β-unsaturated carbonyl scaffold of an endomethylene type on tyrosinase inhibition, 2-phenyl-1,4-naphthoquinone derivatives were synthesized by Michael addition of substituted benzenes to 1,4-naphthoquinone and subsequently an auto-oxidation Most of the derivatives potently inhibited mushroom tyrosinase and four derivatives, including 1c (IC50 = 22.00 ± 1.63 μM), more potently inhibited mushroom tyrosinase than kojic acid (IC50 = 37.86 ± 2.21 μM). Cell-based assays using B16F10 cells (a melanoma cell line) showed 1c dose-dependently suppressed melanin production and more potently inhibited tyrosinase activity than kojic acid. Docking simulation results between 1c and tyrosinase and a kinetic study suggest that 1c is a competitive inhibitor that binds to the active site of tyrosinase. These results support that anti-melanogenic effect of naphthoquinone derivatives results from their tyrosinase inhibiting activity and the (E)-β-phenyl-α,β-unsaturated carbonyl scaffold of an endomethylene type can confer tyrosinase-inhibitory activity.

Medicinal Chemistry Research published new progress about Enzyme inhibitors. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Shi, Yajuan published the artcileNorm index for predicting the rate constants of organic contaminants oxygenated with sulfate radical, Synthetic Route of 151-10-0, the main research area is surface water sulfate radical organic contaminant oxygenation rate modeling; Norm index; Organic contaminants; QSPR; Second-order rate constants; Sulfate radical.

The degradation of organic contaminants in aquatic systems has raised immense attention worldwide, and the second-order rate constant (kSO.-4) of water pollutants oxidized by sulfate radical anion is an important index for assessing the degradation efficiency of organics Herein, a new norm math. formula is defined. Based on this, four new descriptors are proposed and a QSPR model is developed for predicting kSO.-4 using 30 families of emerging organic pollutants in water. The statistical results fully prove that this model has good fitting effect and stability with R2 of 0.8862, Q2LOO of 0.8466, and Q25-fold of 0.8329, resp. The validation results including cross validation, applicability domain anal., and model comparison show that this model has good robustness, predictive performance, and reliability. These decent results indicate that the new norm math. formula is effective in calculating descriptors and the norm indexes have a great application for evaluating the transformation fate of organic pollutants by sulfate radical in aquatic systems.

Environmental Science and Pollution Research published new progress about Electronegativity. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Synthetic Route of 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Smetana, Volodymyr published the artcileSynthesis of Anhydrous Acetates for the Components of Nuclear Fuel Recycling in Dialkylimidazolium Acetate Ionic Liquids, Recommanded Product: 3,5-Diamino-1,2,4-triazole, the main research area is dialkylimidazolium uranium lanthanide strontium oxo acetate complex preparation; crystal structure dialkylimidazolium uranium lanthanide strontium oxo acetate complex.

Anhydrous acetate salts with uranium {[C2C1i.m.][UO2(OAc)3] (1), [C2C2i.m.][UO2(OAc)3] (2), and [C4C1i.m.][UO2(OAc)3] (3)}, lanthanides {[C2C2i.m.]2[La(OAc)5] (4) and [C2C1i.m.]2[Nd(OAc)5] (5)}, and strontium {[C2C1i.m.]n[Sr(OAc)3]n (6)} (C2C1i.m. = 1-ethyl-3-methylimidazolium, C2C2i.m. = 1,3-diethylimidazolium, C4C1i.m. = 1-butyl-3-methylimidazolium, and OAc = acetate) were prepared and structurally characterized. Both lanthanides and strontium are common components of the nuclear fuel waste, and their separation from uranium is an important but still challenging task. A new synthetic approach with dialkylimidazolium acetate ionic liquids (ILs) as the solvent was developed for the direct synthesis of homoleptic acetates from the corresponding hydrates and, unexpectedly, hardly soluble f-element oxides. Although the group of characterized compounds shows perfect structural variability, all actinide and lanthanide metal ions form monomeric complex anions where the metal cation coordinates to five ligands including two oxygen atoms in the case of uranium, as is commonly observed for uranyl compounds Crystallog. analyses revealed that [UO2(OAc)3]- anions possess rather standard D3h symmetry featuring a hexagonal-bipyramidal coordination environment, while the lanthanide anions [Ln(OAc)5]2- are fully asym. and the Ln3+ cations are 10-coordinated as a distorted bicapped tetragonal antiprism. This is the 1st report of lanthanide ions coordinated in this fashion. For Sr2+, 9-fold coordination through oxygen atoms as a strongly distorted tricapped trigonal prism is observed The crystallization of anhydrous, homoleptic, anionic acetate complexes from such a large variety of different metal salts appears to be due to the properties of dialkylimidazolium acetate ILs themselves, including enhanced basicity from the high concentration of free anions and their greater affinity for hydrogen-bonding solutes relative to metal cations. The direct reaction of uranium, selected lanthanides, and strontium salt hydrates with dialkylimidazolium acetate ionic liquids gives anhydrous metal acetates under ambient conditions. This route allows also direct dissolution of the corresponding metal oxides and isolation of homoleptic metal complexes in the presence of various competing ligands. The crystal structure analyses reveal unique coordination of the lanthanides in analogy with the uranyl complexes and significantly distinct behavior of Sr2+.

Inorganic Chemistry published new progress about Crystal structure. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Recommanded Product: 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Oboudatian, Hourieh Sadat published the artcileFibrous nanosilica spheres KCC-1@NH2 as highly effective and easily retrievable catalyst for the synthesis of chromenes, Related Products of isoquinoline, the main research area is fibrous nanosilica sphere amidogen chromene structural morphol property.

A three-component reaction of naphthalene-1,5-diol, malononitrile and aromatic aldehydes has been achieved in the presence of fibrous nanosilica spheres KCC-1@NH2 as highly effective heterogeneous catalysts to produce of chromenes. In this study, simple and effective methods were used for the preparation of nanosilica spheres KCC-1@NH2 as basic catalysts. A fibrous surface morphol., high surface area, high mech. stability, the easy separation of the nanocatalyst and the recyclability, nontoxicity, versatility, combined with low reaction times and excellent yields, make the present protocol very useful for the synthesis of the chromenes. The catalyst has been characterized by FT-IR, XRD, EDX, FE-SEM, TEM, BET and TGA. Also, the synthesized products were confirmed by 1H-NMR, 13C-NMR, FT-IR.

Research on Chemical Intermediates published new progress about Crystal structure. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gonzalez-Lainez, Miguel published the artcileEffective N-methylation of nitroarenes with methanol catalyzed by a functionalized NHC-based iridium catalyst: a green approach to N-methyl amines, HPLC of Formula: 5961-59-1, the main research area is effective methylation nitroarene methanol catalyzed functionalized iridium catalyst.

Compound [IrBr(CO)2(κC-tBuImCH2PyCH2OMe)] featuring a flexible pyridine/OMe functionalized NHC ligand κ1C coordinated efficiently catalyzes the selective N-monomethylation of nitroarenes using methanol as both the reducing agent and the C1 source. A range of functionalized nitroarenes including heterocyclic or sterically hindered derivatives have been efficiently converted to the corresponding N-monomethyl amines in good yields at low catalyst loadings using sub-stoichiometric amounts of Cs2CO3 as a base. Mechanistic investigations support a borrowing-hydrogen mechanism in which methanol acts as the hydrogen source and methylating agent. Further, the hydrogen transfer reduction of nitrobenzene to aniline under optimized reaction conditions should proceed through a direct mechanism involving nitrosobenzene and N-phenylhydroxylamine intermediates.

Catalysis Science & Technology published new progress about Crystal structure. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, HPLC of Formula: 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Xie, Zhen-Lang published the artcileSuccessive constructions of regular tetra-, hexa- and octanuclear microporous polyoxovanadates(III) for gas adsorption, Recommanded Product: 3,5-Diamino-1,2,4-triazole, the main research area is vanadium hydroxide oxalate pyrazole triazolediamine complex preparation gas adsorption; crystal structure vanadium hydroxide oxalate pyrazole triazolediamine complex.

Pyrazole-assisted tetranuclear microporous polyoxovanadates(III) (POVs) (NH4)2K2[V4(μ2-OH)4(ox)4(pz)4]·9H2O (1) (ox = oxalate and pz = pyrazole) and (NH4)2Na2[V4(μ2-OH)4(ox)4(4-mpz)4]·7H2O (2) (4-mpz = 4-methylpyrazole) have been constructed in reduced media, along with their triazole neutral hexa- and octanuclear products K2[V6(μ2-OH)6(ox)6(Hdatrz)6]Cl2·29.5H2O (3) and [V8(μ2-OH)8(SO3)8(Hdatrz)8]·38H2O (4) (Hdatrz = 1H-1,2,4-triazole-3,5-diamine) successively. Both polyanionic structures of 1 and 2 share similar inorganic building blocks that consist of regular {V4(μ2-OH)4} skeletons with an inner diameter of 2.8 Å, while a paddle wheel-shaped cluster 3 contains a {V6(μ2-OH)6} skeleton with two chlorides encapsulated around the center of the ring, occupying a hole of 3.7 Å. An interesting isolated intrinsic polyoxometalate-based metal-organic framework (POMOF) 4 exists as an octanuclear petaloid-like skeleton {V8(μ2-OH)8(SO3)8} with an inner diameter of 5.2 Å. Bond valence sum calculations manifest that all V ions have severely reduced +3 oxidation states in 1-4, which are supported by charge balance, structural and magnetic data. Moreover, gas adsorptions indicate that 1, 2 and 4 can adsorb CO2 and O2 more favorably than N2, CH4 and H2 gases. Compared with 1 and 2, due to the functionalization of microchannels with Lewis base amino and hydroxy groups and uncoordinated azolate N-donors inside POMOF 4, it should have notable affinities toward CO2 adsorption.

Dalton Transactions published new progress about Crystal structure. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Recommanded Product: 3,5-Diamino-1,2,4-triazole.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhu, Jiaxing published the artcileCobalt substitution in a flexible metal-organic framework: modulating a soft paddle-wheel unit for tunable gate-opening adsorption, Product Details of C2H5N5, the main research area is cobalt zinc biphenyltetracarboxylate aminotriazole MOF complex preparation gas adsorption; crystal structure cobalt zinc biphenyltetracarboxylate aminotriazole MOF.

Developing feasible ways to achieve tunable gate-opening pressure (Pgo) while minimizing the side effects on the adsorption capacity and enthalpy is greatly desired for flexible MOFs. In this work, we focused on solving this issue by cobalt substitution. We showed the successful modulation of the energy required for the reversible transformation of a soft paddle-wheel so that the whole framework presented a substitution-dependent Pgo for CO2 adsorption.

Dalton Transactions published new progress about Crystal structure. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Product Details of C2H5N5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhu, Jiaxing published the artcileCobalt substitution in a flexible metal-organic framework: modulating a soft paddle-wheel unit for tunable gate-opening adsorption, Computed Properties of 1455-77-2, the main research area is cobalt zinc biphenyltetracarboxylate aminotriazole MOF complex preparation gas adsorption; crystal structure cobalt zinc biphenyltetracarboxylate aminotriazole MOF.

Developing feasible ways to achieve tunable gate-opening pressure (Pgo) while minimizing the side effects on the adsorption capacity and enthalpy is greatly desired for flexible MOFs. In this work, we focused on solving this issue by cobalt substitution. We showed the successful modulation of the energy required for the reversible transformation of a soft paddle-wheel so that the whole framework presented a substitution-dependent Pgo for CO2 adsorption.

Dalton Transactions published new progress about Crystal structure. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Computed Properties of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gavezzotti, Angelo published the artcileMining the Cambridge Database for theoretical chemistry. Mi-LJC: a new set of Lennard-Jones-Coulomb atom-atom potentials for the computer simulation of organic condensed matter, HPLC of Formula: 598-50-5, the main research area is LJC atom potential organic condensed matter computer simulation review.

A set of 377 crystal structures extracted from the Cambridge Structural Database and matched to the exptl. sublimation enthalpies of the corresponding materials is used to calibrate a new intermol. potential field for organic compounds The scheme includes usual R-6-R-12 Lennard-Jones dispersion-repulsion terms, with parameters for C, H, N, O, S and the halogens, fully transferable and unique for each at. species without distinction among the hybridization states of carbon, or among valence states like carbonyl or ether oxygen or aza, nitro or nitrile nitrogen. This great economy in the number of parameters is countered by the need for using accurate coulombic terms over at. point charges derived for each mol. from the fitting of the electrostatic potential (ESP method) of an ab initio MP2/6-31G** wavefunction. The potential scheme so derived, called Mi-LJC (Milano Lennard-Jones Coulomb), is able to reproduce the 377 sublimation enthalpies by the calculated lattice energies with an average percent deviation of 5% and a rmsd of 6.7 kJ mol-1. The potential scheme is also tested and proved applicable for the Monte Carlo simulation of some organic liquids, as well as for the mol. dynamic simulation of liquids and crystals.

CrystEngComm published new progress about Crystal structure. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, HPLC of Formula: 598-50-5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem