Category: Benzisoxazole

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. Recommanded Product: 25383-99-7, 25383-99-7, Name is Sodium 2-((2-(stearoyloxy)propanoyl)oxy)propanoate, SMILES is O=C(C(C)OC(CCCCCCCCCCCCCCCCC)=O)OC(C)C([O-])=O.[Na+], in an article , author is White, HS, once mentioned of 25383-99-7.

Correlation between anticonvulsant activity and inhibitory action on glial gamma-aminobutyric acid uptake of the highly selective mouse gamma-aminobutyric acid transporter 1 inhibitor 3-hydroxy-4-amino-4,5,6,7-tetrahydro-1,2-benzisoxazole and its N-alkylated analogs

The inhibitory effect of 3-hydroxy-4-amino-4,5,6,7-tetrahydro1,2-benzisoxazole (exo-THPO) and its N-methylated (N-methylexo-THPO) and N-ethylated (N-ethyl-exo-THPO) analogs, derived from gamma-aminobutyric acid (GABA) and 4,5,6,7-tetrahydroisoxazolo[4,5-c]pyridin-3-ol (THPO) on GABA transport was investigated using cultured neocortical neurons (GABAergic) and astrocytes and cloned mouse GABA transporters GAT1-4 expressed in human embryonic kidney (HEK) 293 cells. Anticonvulsant activity was assessed after i.c.v. administration to Frings audiogenic seizure-susceptible mice. Anticonvulsant activity of the O-pivaloyloxymethyl prodrug of N-methyl-exo-THPO was assessed after i.p. administration. Results from these studies were compared with those obtained from similar studies with the novel anticonvulsant drug tiagabine, which acts via inhibition of GABA transport. exo-THPO and its N-alkyl analogs inhibited neuronal, astrocytic, and GAT1-mediated GABA transport but not GABA uptake mediated by GAT2-4. N-Methyl-exo-THPO was 8-fold more potent as an inhibitor of astrocytic versus neuronal GABA uptake. The IC50 value for inhibition of GABA uptake by GAT1 closely reflected its IC50 value for inhibition of neuronal uptake. Tiagabine was approximately 1000-fold more potent than exoTHPO and its alkyl derivatives as an inhibitor of GABA uptake in cultured neural cells and GAT1-expressing HEK 293 cells. exoTHPO, its alkylated analogs, and tiagabine displayed a time- and dose-dependent inhibition of audiogenic seizures after i.c.v. administration. N-Methyl-exo-THPO was the most potent anticonvulsant among the exo-THPO compounds tested and only slightly less potent than tiagabine. The findings suggest a correlation between anticonvulsant efficacy and selective inhibition of astroglial GABA uptake. Furthermore, results obtained with the N-methyl-exo-THPO prodrug demonstrate the feasibility of developing a glial-selective GABA uptake inhibitor with systemic bioavailability.

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

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 3878-55-5, Name is 4-Methoxy-4-oxobutanoic acid, formurla is C5H8O4. In a document, author is Huang Hao, introducing its new discovery. Recommanded Product: 4-Methoxy-4-oxobutanoic acid.

Copper-Catalyzed Enantioselective Aminoboration of Styrenes with 1,2-Benzisoxazole as Nitrogen Source

Organoboron compounds are important intermediates in organic synthesis because of their high utilities for C-C and C-X bond formations. Transition metal-catalyzed borylative difunctionalization of alkenes, which can simultaneously introduce C-B, C-C or C-X bonds, could directly construct highly functionalized organoboron in one step. Among these reactions, copper catalyzed enantioselective aminoboration of styrenes is an efficient approach to generate enantioriched beta-aminoboronate which is a class of useful chiral compounds. In this work, employing styrenes as substrates, 1,2-berrzisoxazole as an electrophilic primary amine source, bis(pinacolato)diboron (B(2)pin(2)) as boron source and LiOCH3 as base, an enantioselective Cu-catalyzed aminoboration of styrenes by using a chiral sulfoxide-phosphine (SOP) ligand was developed, and a board range of chiral beta-aminoalkylboranes, which could be readily converted to a class of valuable beta-hydroxylalkylamines, were accessed with high yields and ee values. A general procedure for this aminoboration of styrenes is described in the following: in a glove box, CuI (0.05 mmol), chiral sulfoxide phosphine ligand L1 (0.06 mmol), and 2 mL of anhydrous tetrahvdrofuran were added into a flame-dried tube. The resulting mixture was stirred at room temperature for 30 min. then bis(pinacolato)diboron (B(2)pin(2)) (0.75 mmol), LiOCH3 (1.25 mmol), styrene 1 (0.5 nunol), 1,2-benzisoxazole (0.75 mmol) and another 2 mL of THE were added into the reaction system in sequence. The reaction tube was removed out from the glove box and stirred at 20 degrees C for 12 h. After the reaction was finished, the NMR yield was firstly determined with dimethyl terephthalate (9.7 mg, 0.05 mmol) as internal standard, then, the crude product was recovered and purified with a preparative TLC which was alkalized with triethylamine to give the desired beta-aminoboronates in moderate to good yields (47%similar to 84%) and enantioselectivities (81%similar to 99%). To demonstrate the utility of this reaction, beta-boronate primary amine could be easily obtained by removing the Schiff base group of beta-aminoboronate 3 under the methanol solution of hydroxylamine hydrochloride, which could be further oxidized to give corresponding chiral beta-amino alcohol in moderate yield (48%).

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

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 99-14-9, Name is Propane-1,2,3-tricarboxylic acid, molecular formula is C6H8O6, belongs to Benzisoxazole compound. In a document, author is Newsome, Jeffery J., introduce the new discover, Computed Properties of C6H8O6.

Benzofuran-, benzothiophene-, indazole- and benzisoxazole-quinones: Excellent substrates for NAD(P)H:quinone oxidoreductase 1

A series of heterocyclic quinones based on benzofuran, benzothiophene, indazole and benzisoxazole has been synthesized, and evaluated for their ability to function as substrates for recombinant human NAD(P)H:quinone oxidoreductase (NQO1), a two-electron reductase upregulated in tumor cells. Overall, the quinones are excellent substrates for NQO1, approaching the reduction rates observed for menadione. (C) 2013 Elsevier Ltd. All rights reserved.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law. In my other articles, you can also check out more blogs about 99-14-9. Computed Properties of C6H8O6.

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

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 6106-21-4, Name is Sodium succinate hexahydrate, molecular formula is C4H16Na2O10. In an article, author is Guo, Sheng,once mentioned of 6106-21-4, Name: Sodium succinate hexahydrate.

A Practical Electrophilic Nitrogen Source for the Synthesis of Chiral Primary Amines by Copper-Catalyzed Hydroamination

A mild and practical method for the catalytic installation of the amino group across alkenes and alkynes has long been recognized as a significant challenge in synthetic chemistry. As the direct hydroamination of olefins using ammonia requires harsh conditions, the development of suitable electrophilic aminating reagents for formal hydroamination methods is of importance. Herein, we describe the use of 1,2-benzisoxazole as a practical electrophilic primary amine source. Using this heterocycle as a new amino group delivery agent, a mild and general protocol for the copper-hydride-catalyzed hydroamination of alkenes and alkynes to form primary amines was developed. This method provides access to a broad range of chiral alpha-branched primary amines and linear primary amines, as demonstrated by the efficient synthesis of the antiretroviral drug maraviroc and the formal synthesis of several other pharmaceutical agents.

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

In an article, author is Deering, Robert W., once mentioned the application of 427-49-6, HPLC of Formula: C13H16O3, Name is alpha-Cyclopentylmandelic Acid, molecular formula is C13H16O3, molecular weight is 220.2643, MDL number is MFCD00019296, category is Benzisoxazole. Now introduce a scientific discovery about this category.

Identification of a bacteria-produced benzisoxazole with antibiotic activity against multi-drug resistant Acinetobacter baumannii

The emergence of multi-drug resistant pathogenic bacteria represents a serious and growing threat to national healthcare systems. Most pressing is an immediate need for the development of novel antibacterial agents to treat Gram-negative multi-drug resistant infections, including the opportunistic, hospital-derived pathogen, Acinetobacter baumannii. Herein we report a naturally occurring 1,2-benzisoxazole with minimum inhibitory concentrations as low as 6.25 mu g ml(-1) against clinical strains of multi-drug resistant A. baumannii and investigate its possible mechanisms of action. This molecule represents a new chemotype for antibacterial agents against A. baumannii and is easily accessed in two steps via de novo synthesis. In vitro testing of structural analogs suggest that the natural compound may already be optimized for activity against this pathogen. Our results demonstrate that supplementation of 4-hydroxybenzoate in minimal media was able to reverse 1,2-benzisoxazole’s antibacterial effects in A. baumannii. A search of metabolic pathways involving 4-hydroxybenzoate coupled with molecular modeling studies implicates two enzymes, chorismate pyruvate-lyase and 4-hydroxybenzoate octaprenyltransferase, as promising leads for the target of 3,6-dihydroxy-1,2-benzisoxazole.

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

Reference of 75-98-9, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 75-98-9, Name is Pivalic acid, SMILES is CC(C)(C)C(O)=O, belongs to Benzisoxazole compound. In a article, author is Bode, JW, introduce new discover of the category.

Isoxazole -> benzisoxazole rearrangement promoted cascade reactions affording stereodefined polycycles

[GRAPHICS] A new chemo-, regio-, and stereoselective cascade reaction features a novel isoxazole –> benzisoxazole rearrangement and affords highly functionalized, differentially protected compounds. The products of this reaction are directly converted to a number of complex, structurally diverse polycyclic molecules. These transformations highlight the unique chemistry inherent to readily prepared fused isoxazoles.

Reference of 75-98-9, Consequently, the presence of a catalyst will permit a system to reach equilibrium more quickly, but it has no effect on the position of the equilibrium as reflected in the value of its equilibrium constant.I hope my blog about 75-98-9 is helpful to your research.

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

Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, 99-06-9, Name is 3-Hydroxybenzoic acid, SMILES is O=C(O)C1=CC=CC(O)=C1, in an article , author is Barmade, Mahesh A., once mentioned of 99-06-9, Recommanded Product: 3-Hydroxybenzoic acid.

Medicinal Chemistry Perspective of Fused Isoxazole Derivatives

Nitrogen containing heterocyclic rings with an oxygen atom is considered as one of the best combination in medicinal chemistry due to their diversified biological activities. Isoxazole, a five membered heterocyclic azole ring is found in naturally occuring ibetonic acid along with some of the marketed drugs such as valdecoxib, flucloxacillin, cloxacillin, dicloxacillin, and danazol. It is also significant for showing antipsychotic activity in risperidone and anticonvulsant activity in zonisamide, the marketed drugs. This review article covers research articles reported till date covering biological activity along with SAR of fused isoxazole derivatives.

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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, Name: Sodium pyruvate, 113-24-6, Name is Sodium pyruvate, SMILES is O=C(C)C([O-])=O.[Na+], belongs to Benzisoxazole compound. In a document, author is PETERS, DH, introduce the new discover.

ZONISAMIDE – A REVIEW OF ITS PHARMACODYNAMIC AND PHARMACOKINETIC PROPERTIES, AND THERAPEUTIC POTENTIAL IN EPILEPSY

Zonisamide is a 1.2 benzisoxazole derivative and the first agent of this chemical class to be developed as an antiepileptic dry. It has shown activity in various animal models of epilepsy, and although a detailed mode of action awaits clarification it appears to block the propagation/spread of seizure discharges and to suppress the epileptogenic focus. Clinical experience with zonisamide in Japan has documented its efficacy in the treatment of partial seizures (partial-onset generalised tonic-clonic, simple partial and/or complex partial seizures), and to a more variable extent, generalised tonic-clonic, generalised tonic (mainly seen in symptomatic generalised epilepsies including Lennox-Gastaut Syndrome) and compound/combination seizures (including those refractory to treatment with other antiepileptic drugs). Other generalised seizure types have also responded to therapy with zonisamide, although only small patient numbers were studied. Zonisamide has demonstrated efficacy equivalent to that of carbamazepine in patients with (mainly) partial seizures, and to that of valproic acid in a small study of children (n = 32) with generalised seizures. Animal studies suggest that zonisamide possesses a more favourable therapeutic index than most other antiepileptic drugs. However, clinical trials conducted to date, have not confirmed any overt tolerability advantage. Indeed, whereas the recommended therapeutic plasma zonisamide concentration is 20 mg/L, clinical investigations have associated adverse events with plasma zonisamide concentrations of >30 mg/L. suggesting the usefulness of therapeutic drug monitoring. Moreover, although plasma concentrations of zonisamide are empirically regarded to be proportional to therapeutic doses in patients in Japan, nonlinear pharmacokinetics have been reported for this drug in patients in the US and may further complicate its use in this patient population. Additional pharmacokinetic studies will help to establish the change in pharmacokinetic profile that occurs with dosage titration in patients outside Japan. Among 700 patients treated with zonisamide in Europe/US, a high incidence of renal calculi (1.9%) has been noted however, the causal relationship to zonisamide is disputed. Indeed, although urinary lithiasis has also been recorded for patients in Japan, the aetiology, incidence and spontaneous regression of this condition suggest that it is not a serious problem for this patient population. Until this difference is clarified, it is likely that zonisamide will find its greatest use in the treatment of patients in Japan. Like many other established antiepileptic drugs, available data suggest the propensity for zonisamide to alter the pharmacokinetic profile of other anticonvulsant agents, although severe interactions appear to be unlikely. The ultimate positioning of zonisamide in the therapy of epilepsy awaits clearer definition of its pharmacokinetic, efficacy (particularly in comparison with other antiepileptics) and tolerability profiles. At present therefore, available data do not support the use of this drug in individuals outside of Japan, except in formal clinical studies involving careful monitoring. However, for patients in Japan with epilepsies refractory to established therapy, zonisamide would appear a valid alternative, particularly in the treatment of partial seizures.

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 113-24-6. Name: Sodium pyruvate.

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

Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, Category: Benzisoxazole123-99-9, Name is Water-soluble azelaic acid, SMILES is O=C(O)CCCCCCCC(O)=O, belongs to Benzisoxazole compound. In a article, author is Forconi, Marcello, introduce new discover of the category.

Medium Effects in Biologically Related Catalysis

Enzymes catalyze chemical reaction in aqueous media, but their active sites significantly differ in properties from water. In this chapter, the work on selected chemical reactions with important biological roles is reviewed to assess our current understanding of the effect of the environment that surrounds the reactive species. In particular, simple medium effects such as the ones provided by organic solvents, ionic liquids, and simple micelles are focused on. The findings that led to the computational design of enzymes that catalyze the Kemp elimination, a prototypical proton transfer reaction that has fascinated researchers for more than a century, are discussed.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 123-99-9. Category: Benzisoxazole.

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

Application of 427-49-6, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 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 article, author is COUTINHO, DLM, introduce new discover of the category.

SYNTHESIS OF HETEROCYCLES FROM 4-(2-HYDROXYBENZOYL)-1-PHENYLPYRAZOLE

4-(2-Hydroxybenzoyl)-1-phenylpyrazole (1) has been used in the synthesis of benzofuran (2), coumarin (5) and benzisoxazole (9).

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