Category: isoquinoline

Molnar, Maja published the artcileCholine Chloride Based Deep Eutectic Solvents as a Tuneable Medium for Synthesis of Coumarinyl 1,2,4-Triazoles: Effect of Solvent Type and Temperature, COA of Formula: C2H6N2O, the main research area is isothiocyanate acetohydrazide deep eutectic solvent temperature effect cyclization green; coumarinyl triazole preparation.

A study of 1,2,4-triazole synthesis from 2-((4-methyl-2-oxo-2H-chromen-7-yl)oxy)acetohydrazide (I) or 2-(7-hydroxy-2-oxo-2H-chromen-4-yl)acetohydrazide (II) and various isothiocyanates, in deep eutectic solvents, was performed. In order to find the best conditions for 1,2,4-triazole formation, a model reaction on I and phenylisothiocyanate was performed in 14 different choline chloride based deep eutectic solvents, at two different temperatures (40 °C and 80 °C). Pure 1,2,4-triazoles were obtained in choline chloride/urea (1:2) and choline chloride/N-Me urea (1:3) deep eutectic solvents at 80 °C. Pure thiosemicarbazides were obtained in choline chloride/ethane-1,2-diol (1:2), choline chloride/malic acid (1:1), choline chloride/malonic acid (1:1), choline chloride/butane-1,4-diol (1:3) and choline chloride/glycerole (1:2) at 40 °C. The ratio of 1,2,4-triazoles and thiosemicarbazides in reaction mixtures was determined by HPLC and 1H NMR. After the best conditions for 1,2,4-triazole synthesis were found, some coumarinyl 1,2,4-triazoles were synthesized from two different coumarinyl hydrazides and various alkyl and aryl isothiocyanates in one step reaction.

European Journal of Organic Chemistry published new progress about Cyclization. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, COA of Formula: C2H6N2O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Hussain, Mulla Althafh published the artcileTotal synthesis of (±)-aspidostomide B, C, regioisomeric N-methyl aspidostomide D and their derivatives, Product Details of C9H10O3, the main research area is aspidostomide B C D analog regioselective synthesis; cyclization total synthesis aspidostomide B C D; dehydration total synthesis aspidostomide B C D; regioselective ring opening total synthesis aspidostomide B C D.

A full account of the total synthesis of aspidostomide B, C, their analogs and our synthetic efforts towards the synthesis of aspidostomide D, which led to the synthesis of regioisomeric N-Me aspidostomide D, its analogs via epoxide opening strategy is presented. The synthesis of regioisomeric N-Me aspidostomide D involves an efficient, five-step sequence, with 36.3% overall yield, starting from 3,4,5-tribromo-1H-pyrrole-2-carboxylic acid. The key features of this protocol are intramol. cyclization, dehydration, oxidation, and a Lewis acid-mediated regioselective epoxide ring opening by C-3 position of 2,5-dibromo-1H-indole to furnish the title compounds

Tetrahedron Letters published new progress about Cyclization. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Product Details of C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhou, Xukai published the artcileSite-Specific and Degree-Controlled Alkyl Deuteration via Cu-Catalyzed Redox-Neutral Deacylation, Related Products of isoquinoline, the main research area is methylketone copper catalyst deacylation regioselective alkyl deuteration.

A Cu-catalyzed degree-controlled deacylative deuteration of diverse alkyl groups with the methylketone (acetyl) moiety as a traceless activating group was reported. The use of N-methylpicolino-hydrazonamide (MPHA) promotes efficient aromatization-driven C-C cleavage. Mono-, di-, and trideuteration at specific sites was selectively achieved. The reaction is redox-neutral with broad functional group tolerance. The utility of this method was demonstrated in forming a complete set of deuterated Et groups, merging with the Diels-Alder reaction, a net devinylative deuteration, and the synthesis of the d2-analog of Austedo.

Journal of the American Chemical Society published new progress about Deacylation. 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

Lei, Lin-Sheng published the artcileThe synthesis of cyanoformamides via a CsF-promoted decyanation/oxidation cascade of 2-dialkylamino-malononitriles, Formula: C8H11NO, the main research area is cyanoformamide preparation; amino malononitrile cascade decyanation oxidation cesium fluoride promoted.

A mild and efficient method for the synthesis of cyanoformamides RR1NC(O)CN [R = R1 = Me, Et, n-Pr, n-Bu; R = Ph, 2-MeC6H4, Me, etc., R1 = Me, Et, n-Bu, Bn, etc.; RR1 = (CH2)5, (CH2)2O(CH2)2, (CH2)2CH(CH3)(CH2)2, etc.] was developed via CsF-promoted cascade decyanation/oxidation reactions of N,N-disubstituted amino-malononitriles. This method featured a wide substrate scope and high reaction efficiency and will facilitate the corresponding cyanoformamide-based biol. studies and synthetic methodol. development.

Organic & Biomolecular Chemistry published new progress about Decyanation. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Formula: C8H11NO.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Mirabile, Salvatore published the artcileEvaluation of 4-(4-Fluorobenzyl)piperazin-1-yl]-Based Compounds as Competitive Tyrosinase Inhibitors Endowed with Antimelanogenic Effects, Formula: C9H10O3, the main research area is fluorobenzylpiperazinyl derivative tyrosinase inhibitor antimelanogenic; Docking studies; Homology model; Kinetic mechanism; Synthesis; Tyrosinase inhibitors.

There is a considerable attention for the development of inhibitors of tyrosinase (TYR) as therapeutic strategy for the treatment of hyperpigmentation disorders in humans. Continuing in our efforts to identify TYR inhibitors, we describe the design, synthesis and pharmacophore exploration of new small mols. structurally characterized by the presence of the 4-fluorobenzylpiperazine moiety as key pharmacophoric feature for the inhibition of TYR from Agaricus bisporus (AbTYR). Our investigations resulted in the discovery of the competitive inhibitor [4-(4-fluorobenzyl)piperazin-1-yl]-(3-chloro-2-nitro-phenyl)methanone 26 (I, IC50=0.18μM) that proved to be ∼100-fold more active than reference compound kojic acid (IC50=17.76μM). Notably, compound 26 exerted antimelanogenic effect on B16F10 cells in absence of cytotoxicity. Docking anal. suggested its binding mode into AbTYR and into modelled human TYR.

ChemMedChem published new progress about Drug safety. 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

Koeke, Niklas published the artcileMulti-layer solid-phase extraction and evaporation-enrichment methods for polar organic chemicals from aqueous matrices, SDS of cas: 117-96-4, the main research area is polar organic chem solid extraction evaporation enrichment water; HILIC; Non-target screening; Polar organic chemicals; Sample preparation; Solid-phase extraction.

Anal. of polar organic chems. in the aquatic environment is exacerbated by the lack of suitable and widely applicable enrichment methods. In this work, we assessed the suitability of a novel combination of well-known solid-phase extraction (SPE) materials in one cartridge as well as an evaporation method and for the enrichment of 26 polar model substances (predominantly log D < 0) covering a broad range of physico-chem. properties in three different aqueous matrixes. The multi-layer solid-phase extraction (mlSPE) and evaporation method were investigated for the recovery and matrix effects of the model substances and analyzed with hydrophilic interaction liquid chromatog.-tandem mass spectrometry (HILIC-MS/MS). In total, 65% of the model substances were amenable (> 10% recovery) to the mlSPE method with a mean recovery of 76% while 73% of the model substances were enriched with the evaporation method achieving a mean recovery of 78%. Target and non-target screening comparison of both methods with a frequently used reversed-phase SPE method utilizing “”hydrophilic and lipophilic balanced”” (HLB) material was performed. Target anal. showed that the mlSPE and evaporation method have pronounced advantages over the HLB method since the HLB material retained only 30% of the model substances. Non-target screening of a ground water sample with the investigated enrichment methods showed that the median retention time of all detected features on a HILIC system decreased in the order mlSPE (3641 features, median tR 9.7 min), evaporation (1391, 9.3 min), HLB (4414, 7.2 min), indicating a higher potential of the described methods to enrich polar analytes from water compared with HLB-SPE. [Figure not available: see fulltext.].

Analytical and Bioanalytical Chemistry published new progress about Evaporation. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, SDS of cas: 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chialvo, Ariel A. published the artcileOsmolyte-Induced Effects on the Hydration Behavior and the Osmotic Second Virial Coefficients of Alkyl-Substituted Urea Derivatives: Critical Assessment of Their Structure-Making/Breaking Behavior, COA of Formula: C2H6N2O, the main research area is osmotic virial coefficients Alkyl Substituted urea derivatives; Osmolyte Induced Effects Hydration Behavior.

We analyzed the hydration behavior of alkyl-substituted urea osmolytes in terms of their deviation from Lewis-Randall solution ideality and characterized their structure-making/breaking tendency according to a proposed solvation formalism that provides a rigorous cause-effect connection between the system microstructure and its solution thermodn. nonidealities. After a brief introduction of the rationale behind the use of Lewis-Randall over alternative solution ideality references, we (i) assessed the effect of the nature and type of alkyl substitution on the osmolyte-induced perturbation of the solution microstructure as a function of composition, (ii) analyzed their microstructural responses to changes in temperature and pressure, and (iii) demonstrated the structure-breaking nature of urea and the magnifying behavior of its alkyl-substituted osmolytes, whose trend follows the increasingly pos. deviation of the osmolyte solutions from Lewis-Randall ideality. Then, we discussed the falsifiability of a pair of frequently used conjectured structure-making/breaking criteria, supported by the derived exact relationships between the structure-making/breaking parameter, the solution thermodn. nonideality, and the osmotic second virial coefficient of the aqueous osmolytes. Finally, we provided an outlook on how the proposed approach could guide the quest for a truly (microstructural to free energy) causative explanation for the denaturation mechanism of proteins.

Journal of Physical Chemistry B published new progress about Free energy. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, COA of Formula: C2H6N2O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Lu, Chunlei published the artcileScalable direct N-methylation of drug-like amines using 12CO2/13CO2 by simple inorganic base catalysis, Safety of 4-Methoxy-N-methylaniline, the main research area is methyl amine preparation; amine carbon dioxide methylation tripotassium phosphate catalyst.

A general protocol for scalable direct N-methylation of wide-scope drug-like amines such as duloxetine, sertraline, tetrahydropapaverine, rasagiline, etc. using CO2 and polymethylhydrosiloxane-a nontoxic, aerobically-stable hydrosilane considered as an industrial waste-via simple inorganic base catalysis has been developed. A rare application of the Sabatier principle in organic chem. led to the discovery of cheap, nontoxic K3PO4 as an efficient catalyst. Preparations of a wide-scope drug-like amines with carbon-isotope label, e.g., I were also successfully achieved, enabling direct use of CO2 in studies of drug absorption, distribution, metabolism and excretion.

Science Bulletin published new progress about Methylation. 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

Yang, Xiaoqing published the artcileDeep eutectic solvents consisting of EmimCl and amides: Highly efficient SO2 absorption and conversion, Name: 1-Methylurea, the main research area is emimcl amide deep eutectic solvent sulfur dioxide absorption conversion; deep eutectic solvent sulfur dioxide absorption phase transfer complex.

There has been a surge in interest and research in the arena of utilizing deep eutectic solvents (DESs) as green solvents for removal of SO2 in recent years. In this work, an effective strategy for SO2 reversible capture and fixation by four amides based DESs was demonstrated. These DESs are composed of 1-ethyl-3-methylimidazolium chloride (EmimCl) and dimethylurea (DMU), N-methylurea (MU), thioacetamide (SAA), or caprolactam (CLAA) in a 2:1 M ratio, which achieve both high gravimetric and molar absorption capacity of SO2 at 20°C and 1.0 bar (up to 1.26 g per g of DES, or 8.00 mol per mol of DES). Results of the NMR and FTIR spectra reveal that there are phys. interactions between SO2 and DESs. Furthermore, absorbed SO2 can be desorbed and no significant drop in SO2 absorption was observed after five successive absorption-desorption cycles. Particularly, the absorbed SO2 was quickly converted in situ into the charge-transfer complex of bis(sulfur dioxide)-1,4-diazabicyclo[2.2.2]octane adduct (DABCO·2SO2) as a high value-added chem. The SO2-lean phase was directly reused for SO2 capture, thus greatly reducing energy requirements and providing a promising method SO2 resource utilization.

Separation and Purification Technology published new progress about Absorbents. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Name: 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Shi, Wei published the artcileComputational Screening of Physical Solvents for CO2 Pre-combustion Capture, Name: 1-Methylurea, the main research area is computational screening solvent carbon dioxide absorption precombustion.

A computational scheme was used to screen phys. solvents for CO2 pre-combustion capture by integrating the com. NIST database, an inhouse computational database, chem-informatics, and mol. modeling. A com. available screened hydrophobic solvent, di-Et sebacate, was identified from the screening with favorable phys. properties and promising absorption performance. The promising performance to use di-Et sebacate in CO2 pre-combustion capture has also been confirmed from experiments Water loading in di-Et sebacate is very low, and therefore, water is kept with H2 in the gas stream. The favorable CO2 interaction with di-Et sebacate and the intermediate solvent free volume fraction leads to both high CO2 solubility and high CO2/H2 solubility selectivity in di-Et sebacate. An inhouse NETL computational database was built to characterize CO2, H2, N2, and H2O interactions with 202 different chem. functional groups. It was found that 13% of the functional groups belong to the strong interaction category with the CO2 interaction energy between -15 and -21 kJ/mol; 62% of the functional groups interact intermediately with CO2 (-8 to -15 kJ/mol). The remaining 25% of functional groups interact weakly with CO2 (below -8 kJ/mol). In addition, calculations show that CO2 interactions with the functional groups are stronger than N2 and H2 interactions but are weaker than H2O interactions. The CO2 and H2O interactions with the same functional groups exhibit a very strong linear pos. correlation coefficient of 0.92. The relationship between CO2 and H2 gas solubilities and solvent fractional free volume (FFV) has been systematically studied for seven solvents at 298.2 K. A skewed bell-shaped relation was obtained between CO2 solubility and solvent FFV. When an organic compound has a d. approx. 10% lower than its d. at 298.2 K and 1 bar, it exhibits the highest CO2 loading at that specific solvent d. and FFV. Note that the solvent densities were varied using simulations, which are difficult to be obtained from the experiment In contrast, H2 solubility results exhibit an almost perfect pos. linear correlation with the solvent FFV. The theor. maximum and min. phys. CO2 solubilities in any organic compound at 298.2 K were estimated to be 11 and 0.4 mol/MPa L, resp. An examination of 182 exptl. CO2 phys. solubility data and 29 simulated CO2 phys. solubilities shows that all the CO2 phys. solubility data are within the maximum and min. with only a few exceptions. Finally, simulations suggest that in order to develop phys. solvents with both high CO2 solubility and high CO2/H2 solubility selectivity, the solvents should contain functional groups which are available to interact strongly with CO2 while minimizing FFV.

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem