Category: 925006-96-8

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 925006-96-8, name is Ethyl 5-(4-methoxyphenyl)isoxazole-3-carboxylate, introducing its new discovery. category: Isoxazoles

Antibiotic resistance among clinically significant bacterial pathogens is becoming a prevalent threat to public health, and new antibacterial agents with novel mechanisms of action hence are in an urgent need. Utilizing computational docking method and structure-based optimization strategy, we rationally designed and synthesized two series of isoxazol-3-yl- and isoxazol-5-yl-containing benzamide derivatives that targeted the bacterial cell division protein FtsZ. Evaluation of their activity against a panel of Gram-positive and -negative pathogens revealed that compounds B14 and B16 that possessed the isoxazol-5-yl group showed strong antibacterial activity against various testing strains, including methicillin-resistant Staphylococcus aureus and penicillin-resistant S. aureus. Further molecular biological studies and docking analyses proved that the compound functioned as an effective inhibitor to alter the dynamics of FtsZ self-polymerization via a stimulatory mechanism, which finally terminated the cell division and caused cell death. Taken together, these results could suggest a promising chemotype for development of new FtsZ-targeting bactericidal agent.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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New chloro-substituted biarylmethoxyphenyl piperidine-4-carboxamides were synthesized and assayed in vitro as inhibitors of the blood coagulation enzymes factor Xa (fXa) and thrombin. An investigation of effects of the amidine and isopropyl groups attached at the piperidine nitrogen and 5-(halogenoaryl) isoxazol-3-yl groups as biaryl substituents led us to identify new compounds which proved to be selective fXa inhibitors, with inhibition constants in the low nanomolar range. The most potent compound 21e, that incorporates 2-Cl-thiophen-5-yl group as the P1 motif and 1-isopropylpiperidine P4 group, inhibited fXa with Ki value of 0.3 nM and very high selectivity over thrombin and some other tested serine proteases, achieving moderate levels of anticoagulant activity in the low micromolar range, as assessed by the prothrombin time clotting assay (PT2 = 3.30 muM). Based on reliable docking simulations, molecular modeling provided a rationale for interpreting structure-activity relationships. The predicted binding modes highlighted the structural requirements for addressing the subsites S1 and S4 of the fXa enzyme.

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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Membrane-bound pyrophosphatases (mPPases) regulate energy homeostasis in pathogenic protozoan parasites and lack human homologues, which makes them promising targets in e.g. malaria. Yet only few nonphosphorus inhibitors have been reported so far. Here, we explore an isoxazole fragment hit, leading to the discovery of small mPPase inhibitors with 6-10 muM IC50 values in the Thermotoga maritima test system. Promisingly, the compounds retained activity against Plasmodium falciparum mPPase in membranes and inhibited parasite growth.

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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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A continuous flow process is presented, which directly converts isoxazoles into their oxazole counterparts via a photochemical transposition reaction. This results in the first reported exploitation of this transformation to establish its scope and synthetic utility. A series of various di- and trisubstituted oxazole products bearing different appendages including different heterocyclic moieties were realized through this rapid and mild flow process. Furthermore, the robustness of this approach was demonstrated by generating gram quantities of selected products while also providing insights into likely intermediates.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Background: Now-a-days, the model of ?hybrid drugs? has acquired recognition in medicine due to their significant role in the treatment of different health problems. Methods: We have synthesized new series of isoxazole-chalcone conjugates (14a-m) by the Claisen-Schmidt condensation of suitable substituted acetophenones with isoxazole aldehydes (12a-d). In vitro cytotoxic activity of the synthesized compounds was studied against four different selected human cancer cell lines by using sulforhodamine B (SRB) method. Results: The adopted scheme resulted in good yields of new series of isoxazole-chalcone conjugates (14a-m). Potent cytotoxic activity was observed for compounds -14a, 14b, 14e, 14i, 14j and 14k against prostate DU-145 cancer cell line. Conclusion: The observed potent cytotoxic activities were due to the presence of 3,4,5- trimethoxyphenyl group.

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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Background: This work reports synthesis and in vitro cholinesterase inhibitory activity of novel indole-isoxazole hybrids. Method: The synthetic procedure was started from different ethyl 5-Arylisoxazole-3-carboxylate derivatives. Hydrolysis and reaction of the later compound with tryptamine afforded the desired products in good yields. Conclusion: Among the synthesized compounds, N-(2-(1H-indol-3-yl)ethyl)-5-(2-chlorophenyl) isoxazole-3-carboxamide (4b) showed the best anti-cholinesterase activity.

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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Related Products of 925006-96-8, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 925006-96-8, molcular formula is C13H13NO4, introducing its new discovery.

Esters of 2-arylcyclopropanecarboxylic acids react with nitrous acid generated in situ with regioselective insertion of the nitrosyl cation into the cyclopropane ring. Depending on the substrate/nitrosylating agent ratio, the reaction proceeds with the formation of either aryl-substituted 3-ethoxycarbonyl-4,5-dihydroisoxazoles or the corresponding isoxazoles. The nature and position of the substituents in the aromatic ring of the starting 2-arylcyclopropanecarboxylic acid esters affect the reaction rate but have no effect on the regioselectivity of the attack by the nitrosyl cation on the three-membered ring. A dependence of the reactivity of isomeric substrates on their stereochemistry and position of the nitro group in the aromatic ring is noted for 2- and 4-nitrophenyl derivatives of esters of cis- and trans-2-arylcyclopropanecarboxylic acids.

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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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A new series of 4-aryl-4H-chromenes bearing a 5-arylisoxazol-3-yl moiety at the C-4 position were prepared as potential anticancer agents. The in vitro cytotoxic activity of the synthesized compounds was investigated against a panel of tumor cell lines including MCF-7 (breast cancer), KB (nasopharyngeal epidermoid carcinoma), Hep-G2 (liver carcinoma), MDA-MB-231 (breast cancer), and SKNMC (human neuroblastoma) using the MTT colorimetric assay. Doxorubicin, a well-known anticancer drug, was used as positive standard drug. Among the synthesized compounds, the 5-(3-methylphenyl)isoxazol-3-yl analog (7j) showed the most potent cytotoxic activity against all five human tumor cell lines. A series of 2-amino-3-cyano-4-(5-arylisoxazol-3-yl)-4H-chromenes were prepared and evaluated against five cancer cell lines including MCF-7 (breast cancer), KB (nasopharyngeal epidermoid carcinoma), Hep-G2 (liver carcinoma), MDA-MB-231(breast cancer), and SKNMC (human neuroblastoma). Compound 7j having 5-(3-methylphenyl)isoxazol-3-yl at the C-4 position was the most active compound. Copyright

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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. name: Ethyl 5-(4-methoxyphenyl)isoxazole-3-carboxylate, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 925006-96-8, name is Ethyl 5-(4-methoxyphenyl)isoxazole-3-carboxylate. In an article，Which mentioned a new discovery about 925006-96-8

Identification of novel 2-(benzo[d]isoxazol-3-yl)-2-oxo-N-phenylacetohydrazonoyl cyanide analoguesas potent EPAC antagonists

Two series of novel EPAC antagonists are designed, synthesized and evaluated in an effort to develop diversified analogues based on the scaffold of the previously identified high-throughput (HTS) hit 1 (ESI-09). Further SAR studies reveal that the isoxazole ring A of 1 can tolerate chemical modifications with either introduction of flexible electron-donating substitutions or structurally restrictedly fusing with a phenyl ring, leading to identification of several more potent and diversified EPAC antagonists (e.g., 10 (NY0617), 14 (NY0460), 26 (NY0725), 32 (NY0561), and 33 (NY0562)) with low micromolar inhibitory activities. Molecular docking studies on compounds 10 and 33 indicate that these two series of compounds bind at a similar site with substantially different interactions with the EPAC proteins. The findings may serve as good starting points for the development of more potent EPAC antagonists as valuable pharmacological probes or potential drug candidates.

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Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

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Novel 1,3-dipropyl-8-(1-heteroarylmethyl-1H-pyrazol-4-yl)-xanthine derivatives as high affinity and selective A2B adenosine receptor antagonists

A series of new 1,3-dipropyl-8-(1-heteroarylmethyl-1H-pyrazol-4-yl)- xanthine derivatives as A2B-AdoR antagonists have been synthesized and evaluated for their binding affinities for the A2B, A 1, A2A, and A3-AdoRs. 8-(1-((3-phenyl-1,2,4- oxadiazol-5-yl)methyl)-1H-pyrazol-4-yl)-1,3-dipropyl-1H-purine-2,6(3H,7H)-dione (4) displayed high affinity (Ki = 1 nM) and selectivity for the A2B-AdoR versus A1, A2A, and A 3-AdoRs (A1/A2B, A2A/A2B, and A3/A2B selectivity ratios of 370, 1100, and 480, respectively). The synthesis and SAR of this novel class of compounds are presented herein.

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Reference：
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem