Tag: M.W=150-200

Abdshahzadeh, Helia published the artcile3-aryl coumarin derivatives bearing aminoalkoxy moiety as multi-target-directed ligands against Alzheimer’s disease, COA of Formula: C9H10O3, the main research area is coumarin derivative aminoalkoxy moiety ligand Alzheimer neuroprotectant; 3-phenylcoumarin; Alzheimer’s disease; cholinesterase; neuroprotective activity; synthesis design; β-amyloid.

Two series of novel coumarin derivatives, substituted at 3 and 7 positions with aminoalkoxy groups, are synthesized, characterized, and screened. The effect of amine substituents and the length of cross-linker are investigated in acetyl- and butyrylcholinesterase (AChE and BuChE) inhibition. Target compounds show moderate to potent inhibitory activities against AChE and BuChE. 3-(3,4-Dichlorophenyl)-7-[4-(diethylamino)butoxy]-2H-chromen-2-one (4y) is identified as the most potent compound against AChE (IC50=0.27 μM). Kinetic and mol. modeling studies affirmed that compound 4y works in a mixed-type way and interacts simultaneously with the catalytic active site (CAS) and peripheral anionic site (PAS) of AChE. In addition, compound 4y blocks β-amyloid (Aβ) self-aggregation with a ratio of 44.11 % at 100 μM and significantly protects PC12 cells from H2O2-damage in a dose-dependent manner.

Chemistry & Biodiversity published new progress about Alzheimer disease. 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

Cheng, Bohan published the artcileUltrastrong underwater adhesion on diverse substrates using non-canonical phenolic groups, Recommanded Product: 2,3-Dimethoxybenzaldehyde, the main research area is ultrastrong underwater adhesion substrate phenolic group.

Robust underwater adhesion is 2773484232 challenging because a hydration layer impedes the interaction between substrates and adhesives. Phenolic adhesives inspired by marine creatures such as mussels were extensively studied, but these adhesives have not reached the adhesion strength and substrate diversity of Man-made dry adhesives. Here, we report a class of ultrastrong underwater adhesives with mol. phenolic designs extending beyond what nature has produced. These non-canonical phenolic polymers show versatile adhesion on various materials, with adhesion strengths exceeding 10 MPa on metal. Incorporating even just a small amount (<10%) of non-canonical phenolic groups into a polymer is sufficient for dramatically enhancing underwater adhesion, suggesting that this new class of phenolic materials will be incorporated into various industrial polymer systems in the future. Nature Communications published new progress about Adhesion, physical. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Recommanded Product: 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Neumann, William L. published the artcileSynthesis and structure-activity relationships of 3,4,5-trisubstituted-1,2,4-triazoles: high affinity and selective somatostatin receptor-4 agonists for Alzheimer′s disease treatment, SDS of cas: 104-01-8, the main research area is somatostatin receptor agonist triazole SAR affinity Alzheimer disease treatment.

Somatostatin receptor-4 (SST4) is highly expressed in brain regions affiliated with learning and memory. SST4 agonist treatment may act to mitigate Alzheimer′s disease (AD) pathol. An integrated approach to SST4 agonist lead optimization is presented herein. High affinity and selective agonists with biol. efficacy were identified through iterative cycles of a structure-based design strategy encompassing computational methods, chem., and preclin. pharmacol. 1,2,4-Triazole derivatives of our previously reported hit (4) showed enhanced SST4 binding affinity, activity, and selectivity. Thirty-five compounds showed low nanomolar range SST4 binding affinity, 12 having a Ki < 1 nM. These compounds showed >500-fold affinity for SST4 as compared to SST2A. SST4 activities were consistent with the resp. SST4 binding affinities (EC50 < 10 nM for 34 compounds). Compound 208 (SST4Ki = 0.7 nM; EC50 = 2.5 nM; >600-fold selectivity over SST2A) display a favorable physiochem. profile, and was advanced to learning and memory behavior evaluations in the senescence accelerated mouse-prone 8 model of AD-related cognitive decline. Chronic administration enhanced learning with i.p. dosing (1 mg kg-1) compared to vehicle. Chronic administration enhanced memory with both i.p. (0.01, 0.1, 1 mg kg-1) and oral (0.01, 10 mg kg-1) dosing compared to vehicle. This study identified a novel series of SST4 agonists with high affinity, selectivity, and biol. activity that may be useful in the treatment of AD.

RSC Medicinal Chemistry published new progress about Affinity (binding). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, SDS of cas: 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Liang, Jingjing published the artcileAroma Constituents in Shanxi Aged Vinegar before and after Aging, Application In Synthesis of 21834-92-4, the main research area is aroma compound aged Shanxi vinegar; GC−O; Shanxi aged vinegar; aroma extract dilution analysis; quantitation; selected reaction monitoring; solvent-assisted flavor evaporation.

Shanxi aged vinegar is one of the most famous Chinese traditional cereal vinegars produced by spontaneous solid-state fermentation However, the aroma composition of Shanxi aged vinegar is still ambiguous. The Shanxi vinegars before and after aging were both analyzed by solvent-assisted flavor evaporation combined with gas chromatog.-mass spectrometry (GC-MS) as well as gas chromatog.-olfactometry (GC-O) in aroma extract dilution anal. A total of 87 odor-active regions were found by GC-O, and 80 odor-active compounds were identified. By GC-MS/MS, in selected reaction monitoring mode, 30 important identifications were quantitated using authentic standards In comparison, the aroma mols. for the vinegars before and after aging were almost the same; only their levels were altered, with mostly the esters and some compounds that produce pungent smells being lost and the levels of those from the Maillard reaction, especially the pyrazines (e.g., tetramethylpyrazine), being greatly increased. As for the aged vinegar, the compounds found to have high flavor dilution factors (>128) were 3-(methylthio)propanal, vanillin, 2,3-butanedione, tetramethylpyrazine, 3-methylbutanoic acid, γ-nonalactone, guaiacol, 3-(methylthio)propyl acetate, di-Me trisulfide, phenylacetaldehyde, 2-ethyl-6-methylpyrazine, 2-acetylpyrazine, 2,3-dimethylpyrazine, furfural, and 3-hydroxy-2-butanone. However, the aroma compounds found at high concentrations (>25 μg/L) in the aged vinegar were acetic acid, followed by 2,3-butanedione, furfural, 3-hydroxy-2-butanone, tetramethylpyrazine, furfuryl alc., and 3-methylbutanoic acid.

Journal of Agricultural and Food Chemistry published new progress about Aging of materials. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Application In Synthesis of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bano, Kulsum published the artcileEconomically Viable and Efficient Catalysts for Esterification and Cross Aldol Condensation Reactions under Mild Conditions, Computed Properties of 86-51-1, the main research area is bronsted acidic ionic liquid catalyst preparation; aromatic ester preparation; aliphatic alc aromatic acid bronsted acidic ionic liquid esterification; alpha bis arylidene cyclohexanone preparation; cyclohexanone aromatic aldehyde ionic liquid catalyst cross aldol condensation.

Bronsted acidic ionic liquids (BAILs) were prepared and used as catalyst and solvent in organic synthesis, due to their negligible volatility, remarkable solubility, good catalytic activity, and easily structurally tunable properties. In the present study, catalytic efficiency of economically viable ionic liquids bearing different cations pyridinium ([PyH]+ and triethylammonium [TEAH]+) for the esterification of aromatic acid with various aliphatic alcs. and crossed aldol condensation (Claisen Schmidt reaction) of aromatic aldehydes with cyclohexanone under ambient condition was investigated. Herein, also examined the effect of various process parameters on the yield of aromatic esters I [R = H, 4-Me, 2-OH, etc.] and α,α’-bis(arylidene)cycloalkanones II [R1 = 4-F, 3-NO2, 3-OC6H5, etc.].

ChemistrySelect published new progress about Aldol condensation. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Computed Properties of 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yu, Xiaohang published the artcileBiochemical properties of fish sauce prepared using low salt, solid state fermentation with anchovy by-products, Application of 5-Methyl-2-phenylhex-2-enal, the main research area is biochem property solid state fermentation salt Engraulis sauce.

Biochem. characteristics of fast fermented fish sauce made by adding anchovy juice during the process of low salt, solid state fermentation were investigated using 3 different techniques (A: adding anchovy juice in the process of making koji, B: adding anchovy juice in the process of fermentation, and C: not adding anchovy juice). After fermentation under optimized conditions, the amino nitrogen contents of sauces A and B were 7.50 and 7.73 mg/mL after two weeks, resp. Chem. anal. suggested that the amounts of amino nitrogen and reducing sugar, degree of hydrolysis (DH), DPPH radical-scavenging activity, total acidity, and total amino acid in sauce B were higher than those in sauce A. Volatile odorant anal. and sensory evaluation showed that sauce B was superior to sauce A. Adding anchovy juice during the process of fermentation is a good way to produce a fish sauce with a good flavor and nutrition value.

Food Science and Biotechnology published new progress about Aspergillus oryzae. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Application of 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Urbisch, Daniel published the artcileAssessment of Pre- and Pro-haptens Using Nonanimal Test Methods for Skin Sensitization, Name: 5-Methyl-2-phenylhex-2-enal, the main research area is prehapten prohapten skin sensitization.

Because of ethical and regulatory reasons, several nonanimal test methods to assess the skin sensitization potential of chems. have been developed and validated. In contrast to in vivo methods, they lack or provide limited metabolic capacity. For this reason, identification of pro-haptens but also pre-haptens, which require mol. transformations to gain peptide reactivity, is a challenge for these methods. In this study, 27 pre- and pro-haptens were tested using nonanimal test methods. Of these, 18 provided true pos. results in the direct peptide reactivity assay (DPRA; sensitivity of 67%), although lacking structural alerts for direct peptide reactivity. The reaction mechanisms leading to peptide depletion in the DPRA were therefore elucidated using mass spectrometry. Hapten-peptide adducts were identified for 13 of the 18 chems. indicating that these pre-haptens were activated and that peptide binding occurred. Pos. results for five of the 18 chems. can be explained by dipeptide formations or the oxidation of the sulfhydryl group of the peptide. Nine of the 27 chems. were tested neg. in the DPRA. Of these, four yielded true pos. results in the keratinocyte and dendritic cell based assays. Likewise, 16 of the 18 chems. tested pos. in the DPRA were also pos. in either one or both of the cell-based assays. A combination of DPRA, KeratinoSens, and h-CLAT used in a 2 out of 3 weight of evidence (WoE) approach identified 22 of the 27 pre- and pro-haptens correctly (sensitivity of 81%), exhibiting a similar sensitivity as for directly acting haptens. This anal. shows that the combination of in chemico and in vitro test methods is suitable to identify pre-haptens and the majority of pro-haptens.

Chemical Research in Toxicology published new progress about Contact dermatitis. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Name: 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Dearden, J. C. published the artcileMechanism-Based QSAR Modeling of Skin Sensitization, SDS of cas: 21834-92-4, the main research area is skin sensitizer QSAR modeling.

Many chems. can induce skin sensitization, and there is a pressing need for non-animal methods to give a quant. indication of potency. Using two large published data sets of skin sensitizers, we have allocated each sensitizing chem. to one of 10 mechanistic categories and then developed good QSAR models for the seven categories that have a sufficient number of chems. to allow modeling. Both internal and external validation checks showed that each model had good predictivity.

Chemical Research in Toxicology published new progress about Contact dermatitis. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, SDS of cas: 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Golla, Ramesh published the artcileSynthesis, photophysical, electrochemical properties and crystal structures and Hirschfeld surface analysis of 4′-dimethoxyphenyl-(2,6-di-2-pyrazinyl) pyridines, Recommanded Product: 2,3-Dimethoxybenzaldehyde, the main research area is synthesis photophys electrochem property crystal structure Hirschfeld surface analysis; dimethoxyphenyldipyrazinylpyridine preparation.

Four new 4′-dimethoxyphenyl-(2,6-di-2-pyrazinyl) pyridines I [R = 2,3-(MeO)2C6H3, 2,4-(MeO)2C6H3, 2,5-(MeO)2C6H3, 3,4-(MeO)2C6H3] were synthesized by a facile one-pot method using 2-acetylpyrazine and n,n’-dimethoxybanzaldehydes. All compounds were characterized by 1H and 13C{1H} NMR, and FT-IR spectroscopy. The mol. structure of compounds I [R = 2,3-(MeO)2C6H3, 2,4-(MeO)2C6H3, 2,5-(MeO)2C6H3] was also confirmed by single crystal X-ray diffraction. There exists CH···N, CH···O and C···C aromatic stacking type of intermol. secondary interactions which resulted into supramol. structures in compounds I [R = 2,3-(MeO)2C6H3, 2,4-(MeO)2C6H3, 2,5-(MeO)2C6H3]. The Hirshfeld surface anal. was carried out for the confirmation of intermol. secondary interactions. The dihedral angles between substituted dimethoxyphenyl ring (B) and central pyridine (A) and pyrazine rings (C and D) are in the range of 33-45°. The photophys. properties were studied by UV-Visible and fluorescence spectroscopy and electrochem. properties by cyclic voltammetry. In the UV-Visible spectra, the compounds I [R = 2,3-(MeO)2C6H3, 2,4-(MeO)2C6H3, 2,5-(MeO)2C6H3, 3,4-(MeO)2C6H3] showed two strong bands at λmax, 236-238 and 284-293 nm attributed to the intramol. charge transfer (π-π*) transitions. When these compounds were excited at 350 nm observed emission bands at λem, 463, 511, 462, and 407 nm resp. The compounds I [R = 2,3-(MeO)2C6H3, 2,4-(MeO)2C6H3, 2,5-(MeO)2C6H3] were showed an oxidation peak, (Eox, 1.18, 1.57 and 1.25 V) but compound I [R = 3,4-(MeO)2C6H3] showed two oxidation peaks (Eox, 1.20 and 1.84 V). Astonishingly, only compound I [R = 2,5-(MeO)2C6H3] have shown a reduction peak at (Ered, 1.33 V) but there was no reduction peak in the other compounds This shows that the compound I [R = 2,5-(MeO)2C6H3] undergo reversible redox reaction.

Journal of Molecular Structure published new progress about Cyclic voltammetry. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Recommanded Product: 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Lekkala, Chinnari published the artcileCopper-Catalyzed One-Pot Synthesis of 2,5-Disubstituted 1,3,4-Oxadiazoles from Arylacetic Acids and Hydrazides via Dual Oxidation, HPLC of Formula: 104-01-8, the main research area is arylacetic acid hydrazide cuprous chloride catalyst oxidative decarboxylation heterocyclization; phenyl oxadiazole preparation.

A simple and efficient protocol was developed to access sym. and unsym. 2,5-disubstituted 1,3,4-oxadiazoles from arylacetic acids and hydrazides via copper-catalyzed dual oxidation under an oxygen atm. Oxidative decarboxylation of arylacetic acids and oxidative functionalization of the imine C-H bond were the key steps. This was the first example of the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles through dual oxidation in one-pot. Avoidance of the expensive ligand and high yield of the products were advantageous features of the developed method.

ACS Omega published new progress about C-H bond activation. 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