Day: July 23, 2021

Synthetic Route of 2879-20-1, Chemical Research Letters, May 2021. The appropriate choice of redox mediator can avoid electrode passivation and overpotential, which strongly inhibit the efficient activation of substrates in electrolysis. 2879-20-1, Name is 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone,introducing its new discovery.

To obtain further insight into the new ruthenium-catalyzed reaction of carbon-hydrogen bonds in aromatic ketones with olefins, the effect of various substituents at the aromatic ring is examined. Reaction of o-methylacetophenone with triethoxyvinylsilane (2) in the presence of [Ru(H)2(CO)(PPh3)3] (3)as the catalyst gave the 1 : 1 addition product in quantitative yield. Similarly, the ketone having an o-CF3 group gave the coupling product 9 in 92% yield. However, ortho substituents such as OMe, F, and CN, seem to react with and kill the catalyst so that no efficient reaction was attained. In the cases of the reactions of p-methoxy- and p-fluoroacetophenones with 2, the corresponding 1 : 2 addition products were obtained as the major product. In the cases of m-substituted acetophenones, two different C-H bonds at the ortho positions are available. The C-C bond formation preferentially occurred at the sterically less congested positions. Exceptions are the reactions of m-methoxy- and m-fluoroacetophenones, in which the C-C bond formation took place preferentially at the more congested position. This may be due to the coordination of oxygen or fluorine atom to ruthenium. The factors controlling these selectivities are discussed.

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Reference of 214894-89-0,New Advances in Chemical Research in 2021. The appropriate choice of redox mediator can avoid electrode passivation and overpotential, which strongly inhibit the efficient activation of substrates in electrolysis. 214894-89-0, Name is 5-(Bromomethyl)-2,3-dihydro-1,4-benzodioxine,introducing its new discovery.

An efficient copper-TEMPO-catalyzed one-pot synthesis of alpha-ketoamides from phenethyl alcohol derivatives was developed firstly. Moreover, molecular oxygen in open air was employed as the oxidant with a broad substrate scope, which makes this methodology more practical. Based on some control experiments, a plausible mechanism was proposed.

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

New discoveries in chemical research and development in 2021. We’ll be discussing some of the latest developments in chemical about CAS: 22013-33-8,Formula: C8H9NO2, In a article, mentioned the application of 22013-33-8, molecular formula is C8H9NO2

Thermochemical conversion processes such as supercritical fluid extraction are used for producing biofuels from biomass. Supercritical fluid extraction process is decomposition process of lignocellulose or other organic materials thermally under supercritical conditions at 250-400 C temperature range under high pressure (4-5 MPa). In this study, the supercritical fluid extraction was used to produce bio-oils from algae. Supercritical fluid extraction trials were performed in a cylindrical reactor (75 mL) in organic solvents (acetone, ethanol and isopropanol) under supercritical conditions with (ferric chloride, potassium hydroxide) and without catalyst at the temperatures of 255, 275 and 295 C. The effects of process variables including temperature and catalyst on product yields were investigated. The produced liquids at 295 C in supercritical liquefaction were analyzed and characterized by elemental, GC-MS and FT-IR. 160, 122 and 108 different types of compounds were identified by GC-MS obtained in acetone, ethanol and isopropanol respectively. Bio-oils from supercritical liquefaction were composed of various organics including aromatics, nitrogenated and oxygenated compounds. Bio-oils obtained from supercritical liquefaction were found to have higher calorific values and superior fuel properties compared to feedstock.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Formula: C8H9NO2, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 22013-33-8, in my other articles.

Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

New discoveries in chemical research and development in 2021. We’ll be discussing some of the latest developments in chemical about CAS: 22013-33-8,Application In Synthesis of 2,3-Dihydrobenzo[b][1,4]dioxin-6-amine, In a article, mentioned the application of 22013-33-8, molecular formula is C8H9NO2

Synthesis of symmetric diarylamines via a twofold intermolecular electrophilic C-H functionalization of electron-rich arenes by umpolung-activated nitroalkane in polyphosphoric acid is demonstrated.

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Research speed reading in 2021.The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. Safety of 2,3-Dihydrobenzo[b][1,4]dioxin-6-amine, In a article, mentioned the application of 22013-33-8, Name is 2,3-Dihydrobenzo[b][1,4]dioxin-6-amine, molecular formula is C8H9NO2

The presented study comprises the synthesis of a new series of ethylated sulfonamides in which 1,4- benzodioxane moietyhas been incorporated. The reaction of 1,4-benzodioxane-6-amine (1) with ethane sulfonyl chloride (2) yielded N-(2,3-dihydrobenzo[1,4]dioxin-6-yl)ethanesulfonamide (3), which further on treatment with various alkyl/aralkyl halides, 4a-r, in N,N?-dimethylformamide (DMF) and in the presence of lithium hydride (LiH) acting as a weak base and catalyst;yielded derivativesofN-alkyl/aralkyl substituted N-(2,3-dihydrobenzo[1,4]dioxin-6- yl)ethanesulfonamides (5a-r). The characterization of these derivatives was carried out by different spectroscopic techniques like infra red, proton-NMR and mass spectrometry; then screened against various enzymes i.e. acetylcholinesterase, butyrylcholinesterase, lipoxygenase and alpha-glucosidase enzymes and five different bacterial strains. The synthesized compounds were found to be good inhibitors of lipoxygenase but moderate inhibitors of AChE, BChE and a-glucosidase; whereas compounds 3, 5a, 5f, 5n and 5r were found good antibacterial compounds. The interaction between inhibitors and target enzymes (cholinestrases and lipoxygenase) was computationally observed which correlated with the experimental results.

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Synthetic Route of 10288-72-9, Research speed reading in 2021. The prevalence of solvent effects in heterogeneous catalysis in condensed media has motivated developing quantitative kinetic. In a document type is Patent, and a compound is mentioned, 10288-72-9, Name is 6-Hydroxy-1,4-benzodioxane, introducing its new discovery.

Compounds having a certain benzoxazine ring system and their precursors are disclosed which are useful for enhancing synaptic responses mediated by AMPA receptors. Also disclosed are methods for preparing such compounds, and methods for their use in treating subjects suffering from impaired nervous or intellectual functioning due to deficiencies in the number of excitatory synapses or in the number of AMPA receptors. The invention compounds can also be used for the treatment of non-impaired subjects for enhancing performance in sensory-motor and cognitive tasks which depend on brain networks utilizing AMPA receptors and for improving memory encoding.

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Related Products of 22013-33-8,New Advances in Chemical Research in 2021. The appropriate choice of redox mediator can avoid electrode passivation and overpotential, which strongly inhibit the efficient activation of substrates in electrolysis. 22013-33-8, Name is 2,3-Dihydrobenzo[b][1,4]dioxin-6-amine,introducing its new discovery.

Abstract: A novel scaffold of N-substituted (3-(1-aminoethylidene)-2-oxochroman-4-yl)phosphonic acid diethyl ester derivatives was designed, synthesized and evaluated as acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) inhibitors against Alzheimer?s disease. Compounds 2a, 2b, 2d and 2q proved to be more potent than the standard drug galantamine and rivastigmine for AChE inhibitory activity with IC50 value between 0.50 and 3.94 muM. All the synthesized compounds proved to be only weak BuChE inhibitors. The compounds showed cytotoxicity in the same range as that of standard drugs against HEK-293 cells. Molecular docking studies suggested that compound 2q is acting as a dual binding site inhibitor by occupying the enzymatic catalytic active site, mid-gorge and peripheral anionic site. The coumarin moiety showed a pi?pi stacking interaction with Trp84 and hydrogen bonds with the P=O and C=O was found with Ser122 and Tyr121 at the catalytic active site. At the peripheral anionic site, the phenyl ring and quinoline ring were stacked against the Tyr 334 and Trp279 through pi?pi stacking interaction, respectively. The predicted ADME showed a good pharmacokinetic profile. DNA cleavage studies suggested that compounds 2a, 2b, 2d and 2q can be considered as non-toxic. Thus, compound 2q could be a promising lead structure for further development as anti-Alzheimer agents. Graphic abstract: [Figure not available: see fulltext.].

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Reference of 22013-33-8, Chemical Research Letters, May 2021. The appropriate choice of redox mediator can avoid electrode passivation and overpotential, which strongly inhibit the efficient activation of substrates in electrolysis. 22013-33-8, Name is 2,3-Dihydrobenzo[b][1,4]dioxin-6-amine,introducing its new discovery.

A compound of the formula: wherein R1 and R2 each is hydrogen, hydroxy, C1-4 alkoxy, C1-4 alkoxy-carbonyl or C1-4 alkyl which may be substituted; R3 is hydrogen, halogen, hydroxy or C1-4 alkoxy which may be substituted; or adjacent two R3 may form C1-4 alkylenedioxy; R4 is hydrogen or C1-4 alkyl; R6 is C1-4 alkyl which may be substituted or a group of the formula: wherein R5 is hydrogen or R4 and R5 may form heterocycle; and n is 0-5, or a salt thereof, has an excellent GnRH-antagonizing activity, and is useful for preventing or treating sex hormone-dependent diseases.

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Research speed reading in 2021.The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. HPLC of Formula: C8H9NO2, In a article, mentioned the application of 22013-33-8, Name is 2,3-Dihydrobenzo[b][1,4]dioxin-6-amine, molecular formula is C8H9NO2

The crystal structure and FTIR spectrum of 3-formylchromone (0) have been analysed. A new organic ligands, 3-(anilinomethylene)-2-methoxychroman-4-one (1) and 3-(1?,4?-benzodioxan-6?-aminomethylene)-2-methoxychroman- 4-one (2) were synthesized. The products of reactions between 3-formylchromone and aniline and 6-amino-1,4,-benzodioxane were studied by elemental analysis, FTIR spectroscopy, thermal analysis and X-ray crystallography. It has been found that these reactions allow to obtain derivatives of 4-chromanones from 3-formylchromone by the mechanism of nucleophilic addition, accompanied by the opening of the pyrone ring. The experimental results indicate that compounds (1) and (2) are thermal stable up to 90 and 100 C, respectively. The FTIR spectra and X-ray analysis showed the present of methoxy-group in these compounds.

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem

Research speed reading in 2021. The prevalence of solvent effects in heterogeneous catalysis in condensed media has motivated developing quantitative kinetic. Product Details of 22013-33-8, In a article, mentioned the application of 22013-33-8, Name is 2,3-Dihydrobenzo[b][1,4]dioxin-6-amine, molecular formula is C8H9NO2

The cationic ruthenium hydride complex [(PCy3) 2(CO)(CH3CN)2RuH]+BF 4- was found to be a highly effective catalyst for the C-H bond activation reaction of arylamines and terminal alkynes. The regioselective catalytic synthesis of substituted quinoline and quinoxaline derivatives was achieved from the ortho-C-H bond activation reaction of arylamines and terminal alkynes by using the catalyst Ru3-(CO)12/HBF 4·OEt2. The normal isotope effect (k CH/kCD = 2.5) was observed for the reaction of C 6H5NH2 and C6D5NH 2 with propyne. A highly negative Hammett value (rho = -4.4) was obtained from the correlation of the relative rates from a series of meta-substituted anilines, m-XC6H4NH2, with sigmap in the presence of Ru3(CO)12/ HBF4·OEt2 (3 mol % Ru, 1:3 molar ratio). The deuterium labeling studies from the reactions of both indoline and acyclic arylamines with DC?CPh showed that the alkyne C-H bond activation step is reversible. The crossover experiment from the reaction of 1-(2-amino-1-phenyl)pyrrole with DC?CPh and HC?CC6H4-p-OMe led to preferential deuterium incorporation to the phenyl-substituted quinoline product. A mechanism involving rate-determining ortho-C-H bond activation and intramolecular C-N bond formation steps via an unsaturated cationic ruthenium acetylide complex has been proposed.

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Reference：
Benzodioxan,
1,4-Benzodioxane | C8H8O2 – PubChem