Day: November 10, 2022

Li, Zhen published the artcileThermodynamic and kinetic studies of hydride transfer from Hantzsch ester under the promotion of organic bases, Related Products of isoquinoline, the main research area is hydride transfer kinetics thermodn Hantzsch ester promotion organic base.

Base-promoted hydride transfer (BPHyT), a strategy for the upconversion of hydride donors, was studied here in a three-component system, composed of Hantzsch ester (HEH), acridinium derivatives and organic bases. Based on the thermodn. parameters of hydricity and pKa, we proposed a thermodn. cycle to evaluate the apparent hydricity of HEH/base combinations, as well as the overall driving force of BPHyT. Bronsted-type linear anal. indicated that the base used in BPHyT is much more effective to regulate the reaction kinetics, compared to conventional Bronsted acid or base catalysis. Structure-reactivity relationships showed that the hydride acceptor and the base contribute equally to regulate the kinetics of BPHyT. Kinetic isotope effects suggested that the hydride transfer is involved in the rate-determining step. Reductions of the polar C:C bonds by HEH/base combinations were performed to confirm the feasibility of applying BPHyT in organic synthesis.

Organic Chemistry Frontiers published new progress about Base catalysis. 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

Zhang, Xujie published the artcileDesign, synthesis, and mechanism study of dimerized phenylalanine derivatives as novel HIV-1 capsid inhibitors, Recommanded Product: 4-Methoxy-N-methylaniline, the main research area is design synthesis mechanism study dimerized phenylalanine; HIV1 capside inhibitor phenylalanine dimer structure activity relationship; Assembly; Capsid; Dimer; HIV-1; Phenylalanine derivatives.

HIV-1 capsid (CA) plays indispensable and multiple roles in the life cycle of HIV-1, become an attractive target in antiviral therapy. Herein, we report the design, synthesis, and mechanism study of a novel series of dimerized phenylalanine derivatives as HIV-1 capsid inhibitors using 2-piperazineone or 2,5-piperazinedione as a linker. The structure-activity relationship (SAR) indicated that dimerized phenylalanines were more potent than monomers of the same chemotype. Further, the inclusion of fluorine substituted phenylalanine and methoxyl substituted aniline was found to be beneficial for antiviral activity. From the synthesized series, I was found to be the most potent compound with an EC50 value of 0.57μM, comparable to II. Interestingly, I demonstrated a slightly higher affinity to the CA monomer than the CA hexamer, commensurate with its more significant effect in the late-stage of the HIV-1 lifecycle. Competitive SPR experiments with peptides from CPSF6 and NUP153 revealed that Q-c4 binds to the interprotomer pocket of hexameric CA as designed. Single-round infection assays showed that I interferes with the HIV-1 life cycle in a dual-stage manner, affecting both pre-and post-integration. Stability assays in human plasma and human liver microsomes indicated that although I has improved stability over II, this kind of inhibitor still requires further optimization. And the results of the online molinspiration software predicted that I has desirable physicochem. properties but some properties still have some violation from the Lipinski rule of five. Overall, the dimerized phenylalanines are promising novel platforms for developing future HIV-1 CA inhibitors with considerable potential for optimization.

European Journal of Medicinal Chemistry published new progress about HIV protease inhibitors. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Recommanded Product: 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wang, Baolu published the artcileA Borane Lewis Acid in the Secondary Coordination Sphere of a Ni(II) Imido Imparts Distinct C-H Activation Selectivity, Name: 1,3-Dimethoxybenzene, the main research area is aromatic compound carbon hydrogen bond activation kinetics nickel imide; crystal structure boryldiphosphine nickel imido metallacyclic complex.

Two borane-functionalized bidentate phosphine ligands that vary in tether length were prepared to examine cooperative metal-substrate interactions. Ni(0) complexes react with aryl azides at low temperatures to form structurally unusual κ2-(N,N)-N3Ar adducts. Warming these adducts affords products of N2 extrusion and in one case, a Ni-imido compound that is capped by the appended borane. Reactions with 1-azidoadamantane (AdN3) provide a distinct outcome, where a proposed Ni imido intermediate activates the sp2 C-H bonds of arenes, even in the presence of benzylic C-H sites. Combined exptl. and computational mechanistic studies demonstrate that the unique reactivity is a consequence of Lewis-acid-induced polarization of the Ni-NR bond, potentially providing a synthetic strategy for chemoselective reaction engineering.

Journal of the American Chemical Society published new progress about Aryl azides Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent). 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

Mokrov, G. V. published the artcileSynthesis and Cardiotropic Activity of Linear Methoxyphenyltriazaalkanes, Name: 2,3-Dimethoxybenzaldehyde, the main research area is methoxyphenyltriazaalkane preparation antiischemic antiarrhythmic antifibrillatory cardiotropic activity.

A new group of potential pFOX inhibitors among linear methoxyphenyltriazaalkanes RCH2NH(CH2)nNH(CH2)mNHCH2R (R = 2,3-(OCH3)2C6H3, 2,4-(OCH3)2C6H3, 2,5-(OCH3)2C6H3, 2,3,4-(OCH3)3C6H2, 2,4,5-(OCH3)3C6H2, 2,4,6-(OCH3)3C6H2; n = 2, 3; m = 2, 3) were designed and synthesized. Cardiotropic activity in rodent experiments was found for most of the synthesized compounds The most active compound RCH2NH(CH2)nNH(CH2)mNHCH2R (R = 2,3,4-(OCH3)3C6H2; n = 2; m = 2) combined with anti-ischemic, antiarrhythmic, and antifibrillatory activities (1 mg/kg, i.v.) and low toxicity (LD50 = 119 mg/kg, mice, i.p.) was selected for development as a potential cardiotropic drug.

Pharmaceutical Chemistry Journal published new progress about Amines Role: PAC (Pharmacological Activity), SPN (Synthetic Preparation), THU (Therapeutic Use), BIOL (Biological Study), PREP (Preparation), USES (Uses). 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

Jiang, Liping published the artcileDiscovery and evaluation of chalcone derivatives as novel potential anti-Toxoplasma gondii agents, Recommanded Product: 2,3-Dimethoxybenzaldehyde, the main research area is chalcone diphenyl propanone preparation Toxoplasma gondii antiparasitic SAR; AI-based drug design; Antiparasitic agents; Chalcone derivatives; Structure-activity relationship; Toxoplasma gondii.

Due to numerous side effects of traditional treatments for toxoplasmosis, it is urgent to develop new anti-Toxoplasma agents with high efficiency and low toxicity. In this study, using drug-food-homologous chalcone skeleton as a leading compound, 6 series of chalcone derivatives were designed, synthesized, and almost 1/2 compounds have good anti-Toxoplasma activity in vitro. The quant. structure-activity relationship model of the anti-Toxoplasma activity of the second batch of compounds was established by random forest method (R2 = 0.9407). The Michael receptor in the mol. skeleton of chalcones plays an important role in improving the activity. Among these compounds, four chalcone derivatives exhibited potent anti-T. gondii activity and low cytotoxicity in vitro. Specifically, 1-(4-aminophenyl)-3-(3,4-dichlorophenyl)propan-1-one, (E)-3-(3,4-dichlorophenyl)-1-(4-(isopropylamino)phenyl) prop-2-en-1-one and 1-(3-aminophenyl)-3-(2,3-dimethoxyphenyl)propan-1-one derivatives effectively inhibited the proliferation of Toxoplasma tachyzoites in vivo. Liver and spleen index and biochem. parameters, such as alanine aminotransferase, aspartate aminotransferase and malondialdehyde were significantly decreased by the three chalcone derivatives, suggesting that they have protective effects on the liver of mice infected with Toxoplasma tachyzoites. Overall, this article provides a series of promising compounds for the development of anti-Toxoplasma agents.

European Journal of Medicinal Chemistry published new progress about Parasitic infection. 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

Shalaby, Raed published the artcileSAR and molecular mechanism studies of monoamine oxidase inhibition by selected chalcone analogs, Computed Properties of 86-51-1, the main research area is monoamine oxidase chalcone; Monoamine oxidase; chalcone; dopamine; mRNA; reversibility.

The present study describes the synthesis of a series of 22 chalcone analogs. These compounds were evaluated as potential human MAO-A and MAO-B inhibitors. The compounds showed varied selectivity against the two isoforms. The IC50 values were found to be in the micromolar to submicromolar range. The Ki values of compound 16(I) were determined to be 0.047 and 0.020 μM for the inhibition of MAO-A and MAO-B, resp. Dialysis of enzyme-inhibitor mixtures indicated a reversible competitive mode of inhibition. Most of the synthesized chalcone analogs showed a better selectivity toward MAO-B. However, introducing of 2,4,6-trimethoxy substituents on ring B shifted the selectivity toward MAO-A. In addition, we investigated the mol. mechanism of MAO-B inhibition by selected chalcone analogs. Our results revealed that these selected chalcone analogs increased dopamine levels in the rat hepatoma (H4IIE) cells and decreased the relative mRNA expression of the MAO-B enzyme.

Journal of Enzyme Inhibition and Medicinal Chemistry published new progress about Enzyme kinetics. 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

Nayak, Amrita published the artcileAnhydrous vs Hydrated f-Element Acetate Polymers Dictated by the Stoichiometry of Protic Acidic/Basic Azole Mixtures, Computed Properties of 1455-77-2, the main research area is cerium neodymium azole acetate anhydrous hydrated coordination polymer preparation; crystal mol structure cerium neodymium azole acetate coordination polymer.

Continuing authors investigations of ionic liquid (IL) based routes to a library of f-element/soft donor complexes which could be studied crystallog., they have explored the dissolution of f-element salts in protic imidazole-based ILs containing only soft donors at high temperatures to drive off volatiles, including water and carboxylic or mineral acids. Here they present their results, reacting acidic and basic azoles in 1:3 or 1:1 stoichiometric compositions at elevated temperature, followed by saturation with Nd(OAc)3·xH2O or Ce(OAc)3·xH2O, which led to 13 new metal-acetate polymeric complexes identified by single-crystal x-ray diffraction. Authors found that the diversity in coordination modes of the simple acetate ligand that interfere with substitution of the softer N donors led to several readily crystallizable complexes forming two distinct groups with respect to f-element interaction with the ionic liquid precursors. When the acidic/basic azole ratio was 1:3, acetate and a neutral basic azole were coordinated to the metal centers but no water, although in one case (2) water was observed in the secondary coordination sphere: [Ce(μ2-OAc)3(C1i.m.)]n (1, C1i.m. = 1-methylimidazole), [Nd(μ2-OAc)3(C1i.m.)]n·nH2O (2), [Ce(μ2-OAc)3(C2i.m.)]n (3, C2i.m. = 1-ethylimidazole), [Ln(μ2-OAc)3DMF]n (Ln = Nd (4), Ce (5); DMF was substituted for the azole mixture), and [Nd(μ2-OAc)3(C4i.m.)]n (6, C4i.m. = 1-butylimidazole). However, when the stoichiometric ratio was 1:1, water was always observed coordinated to the metal ions with the acidic azole included in the structure as a solvate or cocrystal, despite a higher reaction temperature: [Nd(μ2-OAc)3(OH2)]n·n(1,2,3-Taz) (7, 1,2,3-Taz = 1,2,3-triazole), [Ln(μ2-OAc)3(OH2)]n·n(4,5-DCim) (Ln = Nd (8), Ce (9), 4,5-DCim = 4,5-dicyanoimidazole), [Ln(μ2-OAc)3(OH2)]n·n(3,5-diNH2-1,2,4-Taz) (Ln = Nd (10), Ce (11), 3,5-diNH2-1,2,4-Taz = 3,5-diamino-1,2,4-triazole), [Ce(μ2-OAc)3(OH2)]n·n(3-NH2-1,2,4-Taz) (12, 3-NH2-1,2,4-Taz = 3-amino-1,2,4-triazole), and [Nd(μ2-OAc)3(OH2)]n·n(5-NH2-Tz) (13, 5-NH2-Tz = 5-aminotetrazole). All of the compounds retain the Ln:OAc- ratio of 1:3 and form 1D polymeric chains; however, they exhibit a variety of coordination modes affecting the degree of chain condensation. The isolation of both hydrated and anhydrous products revealed different abilities of the investigated soft N-donors to compete with O-donors finding their place in the coordination sphere of the lanthanide or in the crystal lattice.

Crystal Growth & Design 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

Nayak, Amrita published the artcileAnhydrous vs Hydrated f-Element Acetate Polymers Dictated by the Stoichiometry of Protic Acidic/Basic Azole Mixtures, Synthetic Route of 1455-77-2, the main research area is cerium neodymium azole acetate anhydrous hydrated coordination polymer preparation; crystal mol structure cerium neodymium azole acetate coordination polymer.

Continuing authors investigations of ionic liquid (IL) based routes to a library of f-element/soft donor complexes which could be studied crystallog., they have explored the dissolution of f-element salts in protic imidazole-based ILs containing only soft donors at high temperatures to drive off volatiles, including water and carboxylic or mineral acids. Here they present their results, reacting acidic and basic azoles in 1:3 or 1:1 stoichiometric compositions at elevated temperature, followed by saturation with Nd(OAc)3·xH2O or Ce(OAc)3·xH2O, which led to 13 new metal-acetate polymeric complexes identified by single-crystal x-ray diffraction. Authors found that the diversity in coordination modes of the simple acetate ligand that interfere with substitution of the softer N donors led to several readily crystallizable complexes forming two distinct groups with respect to f-element interaction with the ionic liquid precursors. When the acidic/basic azole ratio was 1:3, acetate and a neutral basic azole were coordinated to the metal centers but no water, although in one case (2) water was observed in the secondary coordination sphere: [Ce(μ2-OAc)3(C1i.m.)]n (1, C1i.m. = 1-methylimidazole), [Nd(μ2-OAc)3(C1i.m.)]n·nH2O (2), [Ce(μ2-OAc)3(C2i.m.)]n (3, C2i.m. = 1-ethylimidazole), [Ln(μ2-OAc)3DMF]n (Ln = Nd (4), Ce (5); DMF was substituted for the azole mixture), and [Nd(μ2-OAc)3(C4i.m.)]n (6, C4i.m. = 1-butylimidazole). However, when the stoichiometric ratio was 1:1, water was always observed coordinated to the metal ions with the acidic azole included in the structure as a solvate or cocrystal, despite a higher reaction temperature: [Nd(μ2-OAc)3(OH2)]n·n(1,2,3-Taz) (7, 1,2,3-Taz = 1,2,3-triazole), [Ln(μ2-OAc)3(OH2)]n·n(4,5-DCim) (Ln = Nd (8), Ce (9), 4,5-DCim = 4,5-dicyanoimidazole), [Ln(μ2-OAc)3(OH2)]n·n(3,5-diNH2-1,2,4-Taz) (Ln = Nd (10), Ce (11), 3,5-diNH2-1,2,4-Taz = 3,5-diamino-1,2,4-triazole), [Ce(μ2-OAc)3(OH2)]n·n(3-NH2-1,2,4-Taz) (12, 3-NH2-1,2,4-Taz = 3-amino-1,2,4-triazole), and [Nd(μ2-OAc)3(OH2)]n·n(5-NH2-Tz) (13, 5-NH2-Tz = 5-aminotetrazole). All of the compounds retain the Ln:OAc- ratio of 1:3 and form 1D polymeric chains; however, they exhibit a variety of coordination modes affecting the degree of chain condensation. The isolation of both hydrated and anhydrous products revealed different abilities of the investigated soft N-donors to compete with O-donors finding their place in the coordination sphere of the lanthanide or in the crystal lattice.

Crystal Growth & Design 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, Synthetic Route of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bao, Ming published the artcileGold-Catalyzed 1,2-Acyloxy Migration/Coupling Cascade of Propargyl Diazoacetates: Synthesis of Isomycin Derivatives, Safety of 4-Methoxyphenylacetic acid, the main research area is propargyl diazoacetate gold catalyst carbocyclization acyloxy migration coupling cascade; isomycin derivative preparation.

An efficient gold(I)-catalyzed carbocyclization reaction for the synthesis of isomycin derivatives from propargyl diazoacetates has been developed. The suggested cyclization pathway delineated the first example of a vinyl gold carbenoid species generated in situ from gold(I)-catalyzed 1,2-acyloxy migration and intercepted by a cross-coupling reaction with the remaining tethered diazo functionality. The use of protic additives was essential to regulating the reaction outcome by fine-tuning the catalytic preference of the gold(I) complex.

Organic Letters published new progress about Cross-coupling reaction. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Safety of 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Huang, Shuang published the artcileN-Methylation of ortho-substituted aromatic amines with methanol catalyzed by 2-arylbenzo[d]oxazole NHC-Ir(III) complexes, Application In Synthesis of 5961-59-1, the main research area is arylamine methanol arylbenzoxazole iridium complex catalyst methylation green chem; methyl arylamine preparation.

Seven new chelated cyclometalated Ir complexes of ABON,P, ABON,O and ABON,C(carbene) based on a rigid and tunable 2-arylbenzo[d]oxazole backbone were prepared for the N-methylation of amines. Among these three coordinated modes, ABON,C(carbene)-chelated iridium-based catalysts exhibited good performance in the monomethylation of aromatic amines with methanol (MeOH) as the green methylation reagent. The steric-modified synthesis of ABON,C(carbene) complexes was described. The most active ABON,C(carbene) complex with marginal steric hindrance as a catalyst was obtained from the benzoxazole ring without a substituent and Me group of the benzimidazole ring on the N-heterocyclic carbene (NHC) ligand. A variety of amines including para- and meta-substituted aromatic amines, as well as heterocyclic amines, were formulated as suitable substrates. Importantly, this catalyst considerably promoted the yield of the N-methylation of ortho-substituted aromatic amines. Controlled kinetic experiments and deuterium-labeling reactions of these ortho-substituted amines were conducted under optimized conditions. On the basis of the exptl. results, a plausible mechanism was proposed.

Dalton Transactions published new progress about Green chemistry. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Application In Synthesis of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem