Day: May 7, 2021

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 15026-17-2, Name is 4-(tert-Butoxy)-4-oxobutanoic acid, SMILES is CC(C)(C)OC(=O)CCC(O)=O, in an article , author is Schousboe, Arne, once mentioned of 15026-17-2, SDS of cas: 15026-17-2.

Delineation of the Role of Astroglial GABA Transporters in Seizure Control

Studies of GABA transport in neurons and astrocytes have provided evidence that termination of GABA as neurotransmitter is brought about primarily by active transport into the presynaptic, GABAergic nerve endings. There is, however, a considerable transport capacity in the astrocytes surrounding the synaptic terminals, a transport which may limit the availability of transmitter GABA leading to a higher probability of seizure activity governed by the balance of excitatory and inhibitory neurotransmission. Based on this it was hypothesized that selective inhibition of astrocytic GABA transport might prevent such seizure activity. A series of GABA analogs of restricted conformation were synthesized and in a number of collaborative investigations between Prof. Steve White at the University of Utah and medicinal chemists and pharmacologists at the School of Pharmacy and the University of Copenhagen, Denmark, GABA analogs with exactly this pharmacological property were identified. The most important analogs identified were N-methyl-exo-THPO (N-methyl-3-hydroxy-4-amino-4,5,6,7-tetrahydro-1,2-benzisoxazole) and its lipophilic analog EF-1502 ((RS)-4-[N-[1,1-bis(3-methyl-2-thienyl)but-1-en-4-yl]-N-methylamino]-4,5,6,7-tetrahydrobenzo[d]isoxazol-3-ol) both of which turned out to be potent anticonvulsants in animal models of epilepsy.

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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

Chemistry is traditionally divided into organic and inorganic chemistry. The former is the study of compounds containing at least one carbon-hydrogen bonds. 1113-38-8, Name is Ammonium oxalate, molecular formula is C2H8N2O4, belongs to benzisoxazole compound, is a common compound. In a patnet, author is Malik, Sachin, once mentioned the new application about 1113-38-8, Recommanded Product: Ammonium oxalate.

Design and synthesis of (5-amino-1, 2, 4-triazin-6-yl)(2-(benzo[d] isoxazol-3-yl) pyrrolidin-1-yl)methanone derivatives as sodium channel blocker and anticonvulsant agents

A series of novel (5-amino-3-substituted-1, 2, 4-triazin-6-yl) (2-(6-halo-substituted benzo[d]isoxazol-3-yl) pyrrolidin-1-yl) methanone 5a-5r was synthesized. Their anticonvulsant activities were evaluated by the maximal electroshock (MES) test and neurotoxicity was evaluated by the rotorod test. The MES test showed that (5-amino-3-phenyl-1, 2, 4-triazin-6-yl)(2-(6-fluorobenzo[d]isoxazol-3-yl) pyrrolidin-1-yl) methanone 5c was found to be the most potent compound with ED50 value of 6.20 mg/kg (oral/rat) and a protective index (PI = ED50/TD50) value of >48.38, which was much higher than the PI of the reference drug phenytoin. To explain the possible mechanism of action of selected derivatives 5b, 5c, 5i and 5o, their influence on sodium channel was evaluated in vitro.

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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, Application In Synthesis of alpha-Cyclopentylmandelic Acid, 427-49-6, Name is alpha-Cyclopentylmandelic Acid, SMILES is O=C(O)C(O)(C1CCCC1)C2=CC=CC=C2, belongs to benzisoxazole compound. In a document, author is ZAFAR, Y, introduce the new discover.

PLANT-REGENERATION FROM EXPLANT AND PROTOPLAST-DERIVED CALLUSES OF MEDICAGO-LITTORALIS

Plant regeneration from explant and protoplast derived callus has been achieved in Medicago littoralis cv. Harbinger 1886, an annual legume resistant to the fungus Pseudopeziza medicaginis. Callus was induced from different tissue explants and the fastest growth rate was observed for hypocotyls in B5 medium with 2 mg l(-1) 2,4-dichlorophenoxyacetic acid and 0.5 mg l(-1) N-6-benzyladenine. Protoplasts were isolated from cotyledons and leaves of sterile plants and from callus; the first two kinds of protoplasts showed a plating efficiency of 5.6% and 5%, respectively, when embedded in agarose. Plant regeneration occurred on media containing N-6-Delta(2)isopentenyl-adenine combined with indole-3-acetic acid or 1,2-benzisoxazole-3-acetic acid, and on media with N-6-benzyladenine plus alpha-naphtaleneacetic acid; a cytokinin/auxin ratio higher than 1 induced embryos while a ratio around 1 stimulated shoot formation. Embryo development and rooting of shoots were performed in RL medium without growth regulators.

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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

In an article, author is Baglieri, Ausilia, once mentioned the application of 40052-13-9, Recommanded Product: 40052-13-9, Name is 3-Tert-butoxy-3-oxopropanoic acid, molecular formula is C7H12O4, molecular weight is 160.1678, MDL number is MFCD00191886, category is benzisoxazole. Now introduce a scientific discovery about this category.

Competitive Copper Catalysis in the Condensation of Primary Nitro Compounds with Terminal Alkynes: Synthesis of Isoxazoles

Isoxazoles, mainly 3,5-disubstituted, are prepared by catalytic condensation of primary nitro compounds with terminal acetylenes by using a copper/base catalytic system. The additional catalytic effect of the copper(II) salts is evidenced by comparing the kinetic profiles. Selectivity dependence on reaction conditions is considered for phenylacetylene in the following competitive processes: oxidative coupling of terminal alkynes to conjugated diynes catalyzed by Cu-II and base in the presence of air; production of furazans beside condensation with benzoylnitromethane to 3-benzoylisoxazoles, as a result of the reaction of the dipolarophile with 3,4-dibenzoylfuroxan; addition of electron-poor alkynes (e.g., methyl propiolate) with themselves and with the nitro compound. Thus, oxidative coupling is negligible in reactions with active nitro compounds, whereas with nitroalkanes both products are observed: only trace amounts of isoxazoles are detected without copper. Similarly, in the presence of copper, 3-benzoyl-5-phenylisoxazole is predominant over the furazan. Furthermore, condensations of electron-poor alkynes give complex reaction mixtures in the presence of base alone, but cycloadducts are conveniently prepared with copper. The results indicate the practical and general utility of this catalytic method for synthetic practice.

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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 526-83-0, Name is 2,3-Dihydroxysuccinic acid, SMILES is O=C(O)C(O)C(O)C(O)=O, in an article , author is Lifshitz, Assa, once mentioned of 526-83-0, Safety of 2,3-Dihydroxysuccinic acid.

Decomposition and isomerization of 1,2-benzisoxazole: Single-pulse shock-tube experiments, quantum chemical and transition-state theory calculations

Isomerization and decomposition of 1,2-benzisoxazole were studied behind reflected shock waves in a pressurized driver, single-pulse shock tube. It isomerizes to o-hydroxybenzonitrile, and no fragmentation is observed up to a temperature where the isomerization is almost complete (similar to 1040 K at 2 ms reaction time). The isomerization experiments in this investigation covered the temperature range 900-1040 K. The lack of fragmentation is in complete contrast to the thermal behavior of isoxazole, where no isomerization was observed and the main decomposition products over the same temperature range were carbon monoxide and acetonitrile. In a series of experiments covering the temperature range 1190-1350 K, a plethora of fragmentation products appear in the post shock samples of 1,2-benzisoxazole. The product distribution is exactly the same regardless of whether the starting material is 1,2-benzisoxazole or o-hydroxybenzonitrile, indicating that over this temperature range the 1,2-benzisoxazole has completely isomerized to o-hydroxybenzonitrile prior to fragmentation. Two potential energy surfaces that lead to the isomerization were evaluated by quantum chemical calculations. One surface with one intermediate and two transition states has a high barrier and does not contribute to the process. The second surface is more complex. It has three intermediates and four transition states, but it has a lower overall barrier and yields the isomerization product o-hydroxybenzonitrile at a much higher rate. The unimolecular isomerization rate constants k(infinity) at a number of temperatures in the range of 900-1040 K were calculated from the potential energy surface using transition-state theory and then expressed in an Arrhenius form. The value obtained is k(first) = 4.15 x 10(14) exp(-51.7 x 10(3)/RT) s(-1), where R is expressed in units of cal/(K mol). The calculated value is somewhat higher than the one obtained from the experimental results. When it is expressed in terms of energy difference it corresponds of ca. 2 kcal/mol.

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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

Electric Literature of 40052-13-9, Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. 40052-13-9, Name is 3-Tert-butoxy-3-oxopropanoic acid, SMILES is CC(C)(C)OC(=O)CC(O)=O, belongs to benzisoxazole compound. In a article, author is Kurth, MJ, introduce new discover of the category.

Claimed 2,1-benzisoxazoles are indazalones

Claims, by two groups, to have prepared 2,1-benzisoxazole derivatives are corrected to show that the products are indazalones (5). In addition, a simple preparation of 3-oxy-substituted 2H-indazole, by an unrecognized method in the literature, is reported.

Electric Literature of 40052-13-9, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 40052-13-9.

Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 35963-20-3, Name is ((1R,4S)-7,7-Dimethyl-2-oxobicyclo[2.2.1]heptan-1-yl)methanesulfonic acid, molecular formula is , belongs to benzisoxazole compound. In a document, author is Jadhav, VK, Recommanded Product: 35963-20-3.

Sodium perborate: A facile synthesis of 1,2-benzisoxazole 2-oxides

An efficient and convenient methodology has been developed for the conversion of 2-hydroxy phenyl ketoxime to 1,2-benzisoxazole 2-oxide with sodium perborate (SPB) in glacial acetic acid under mild reaction conditions. Interestingly when the reaction was carried out under reflux condition deoximation was observed in quantitative yield.

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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

Application of 68-04-2, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 68-04-2, Name is Sodium citrate, SMILES is O=C(CC(C([O-])=O)(O)CC([O-])=O)[O-].[Na+].[Na+].[Na+], belongs to benzisoxazole compound. In a article, author is Orlov, VY, introduce new discover of the category.

Nucleophilic substitution of hydrogen in activated nitroarenes by phenylacetonitrile carbanion

General relations holding in nucleophilic substitution of hydrogen in para-substituted nitroarenes by phenylacetonitrile carbanion were analyzed in terms of the Klopman reactivity indices. Requirements to the substrate structure were determined, which restrict the scope of application of this method to synthesis of 2,1-benzisoxazole derivatives.

Application of 68-04-2, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 68-04-2.

Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

In an article, author is Punatkar, Yogesh V., once mentioned the application of 600-18-0, Name is 2-Oxobutanoic acid, molecular formula is C4H6O3, molecular weight is 102.09, MDL number is MFCD00004164, category is benzisoxazole. Now introduce a scientific discovery about this category, Safety of 2-Oxobutanoic acid.

SYNTHESIS AND ANTIMICROBIAL ACTIVITY OF BENZISOXAZOLE DERIVATIVES AND THEIR N-GLUCOSIDES

Different 7-amino-3-methyl-5-(3′-aryl prop-2′-enoyl)-1,2-benzisoxazoles were synthesized by the interaction of appropriate 5-acetyl-7-amino-3-methyl-1,2-benzisoxazole with different aromatic aldehydes using piperidine. Tetra-O-acetyl-alpha-D-glucopyranosyl bromide was prepared by the reaction of powdered glucose pentaacetate and bromine in the presence of chloroform. Condensation of tetra-O-acetyl-alpha-D-glucopyranosyl bromide with 7-amino-3-methyl-5-(3′-aryl prop-2′-enoyl)-1,2-benzisoxazoles furnished 7-amino-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl)-3-methyl-5-(3′-aryl prop-2′-enoyl)-1,2-benzisoxazoles which on deprotection gave 7-amino-(beta-D-glucopyranosyl)-3-methyl-5-(3′-aryl prop-2′-enoyl)-1,2-benzisoxazoles. Polarographic studies revealed the presence of reducible groups with distinguished E-1/2 values. All compounds were screened for antimicrobial activities, and some compounds showed potent antibacterial and antifungal activities. [GRAPHICS]

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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Category: Benzisoxazole, 815-17-8, Name is 3,3-Dimethyl-2-oxobutanoic acid, molecular formula is C6H10O3, belongs to benzisoxazole compound. In a document, author is Sharma, Sushila, introduce the new discover.

Vasicine from Adhatoda vasica as an organocatalyst for metal-free Henry reaction and reductive heterocyclization of o-nitroacylbenzenes

Vasicine, a quinazoline alkaloid, from the leaves of Adhatoda vasica, has been utilized as an efficient catalyst for metal and base free Henry reaction of various aldehydes with nitro alkanes. The method can be used in the synthesis of various beta-nitro alcohols under mild reaction conditions without use of hazardous organic solvents and expensive catalysts. Vasicine is also applied successfully for one pot synthesis of 2,1-benzisoxazoles from o-nitroacylbenzenes in good yields under mild conditions. (C) 2016 Elsevier Ltd. All rights reserved.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 815-17-8. Category: Benzisoxazole.

Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics