Category: isoxazole

Role of Nrf2/HO-1 signaling pathway in treatment of schizophrenia rats with paliperidone was written by Wang, Li;Zhang, Song;Long, Wei. And the article was included in Zhongguo Laonianxue Zazhi in 2022.COA of Formula: C23H27FN4O3 This article mentions the following:

Objective: To investigate the mechanism of NF-E2-related factor (Nrf)2/heme oxygenase (HO)-1 signaling pathway in the treatment of schizophrenia (SZ) rats with paliperidone. Methods: Fifty SPF SD rats were randomly divided into 5 groups: control group (Control group), SZ group (Model group), risperidone group, low-dose paliperidone group and high-dose paliperidone group. The rat model of SZ development was established by i.p. injection of didroxepine maleate (MK-801, 0.25 mg/kg). Rats in low-dose paliperidone group, high-dose paliperidone group and risperidone group were given paliperidone (0.03 mg/kg, once daily), paliperidone (0.30 mg/kg, once daily) and risperidone (0.10), resp. mg/kg, once a day), and rats in Control group and Model group were given the same amount of normal saline. The open field test box was used to analyze the changes of total distance within 10 min in each group. Morris water maze was used to test the reference memory of rats in each group. Social interaction test box was used to test the social interaction ability of rats in each group. And Western blotting was used to detect the expression levels of Caspase-3, Bax protein, Nrf2 and HO-1 in hippocampus tissues of rats in each group. Results: Compared with the Control group, the total distance of spontaneous activity in the Model group was significantly increased, the escape latency was significantly increased, the frequency of crossing the platform was significantly decreased, and the social interaction time and the percentage of non-aggressive behavior were significantly decreased (P<0.05). Compared with the Model group, the total distance of spontaneous activity in risperidone group, the low-dose paliperidone group and the high-dose paliperidone group were significantly decreased, the escape latency was significantly decreased, the number of platform crossing was significantly increased, the social interaction time and the percentage of non-aggressive behavior were significantly increased (P<0.05). Compared with the Control group, the expression levels of caspas-3 and Bax protein in the Model group were significantly increased, and the expression levels of Nrf2 and HO-1 protein were significantly decreased (P<0.05). Compared with the Model group, the protein expression levels of digested caspase-3 and Bax in the hippocampus of risperidone group, low-dose paliperidone group and high-dose paliperidone group were significantly decreased, and the protein expression levels of Nrf2 and HO-1 were significantly increased (P<0.05). Conclusion: Paliperidone can alleviate abnormal behavior in SZ model rats, and may play a role by regulating Nrf2/HO-1 signaling pathway. In the experiment, the researchers used many compounds, for example, 3-(2-(4-(6-Fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (cas: 144598-75-4COA of Formula: C23H27FN4O3).

3-(2-(4-(6-Fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (cas: 144598-75-4) belongs to isoxazole derivatives. Isoxazoles are aromatic heterocycles containing an N–O bond. The weakness of this bond allows the ring opening of these heterocycles under reductive conditions. As with isoxazolines, isoxazoles may be cleaved using low-valent titanium obtained from the Kulinkovich reaction.This procedure affords enaminoketones from 2,4-substituted isoxazoles.COA of Formula: C23H27FN4O3

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Quantification of panel of most potent antipsychotic medicines by high throughput UPLC method was written by Jebaliya, Hetal;Shah, Anamik;Karad, Sharad C.;Nakum, Shraddha;Dabhi, Batuk. And the article was included in Results in Chemistry in 2022.COA of Formula: C23H27FN4O3 This article mentions the following:

The delegated work entails the simultaneous quantification and validation of a panel of common antipsychotic compounds in dosage form using the UPLC method. The antipsychotic medications used in the study were; Amisulpride, Risperidone, Paliperidone, Ziprasidone, Aripiprazole and Lurasidone. Acquity UPLC@BEH shield RP C18 (100 mm X 2.1 mm id, 1.7 m particle size) column was used to sep. the samples with gradient elution consisting of 0.1% TFA and ACN with a PDA detector. The entire anal. took only 7 min with a 0.3 mL/min flow rate, 1 μl injection volume and a 45 °C column oven temperature The current approach provides good resolution and low solvent consumption in a short amount of time. In most Quality Control laboratories, time-consuming methods and distinct mobile phases are used for different dosage forms of pharmaceuticals, however, the proposed method saves time and money by removing the need to change mobile phases. As a result, the method can be used in QC laboratories where time-consuming methods are used with different mobile-stationary phases. Antipsychotic drug anal. is mainly utilized in QC laboratory and forensic toxicol. to monitor medication therapy or to explain the cause of intoxication in human performance and post-mortem situations. In the experiment, the researchers used many compounds, for example, 3-(2-(4-(6-Fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (cas: 144598-75-4COA of Formula: C23H27FN4O3).

3-(2-(4-(6-Fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (cas: 144598-75-4) belongs to isoxazole derivatives. Isoxazoles are aromatic heterocycles containing an N–O bond. Isoxazoles are commonly used as enaminoketone or β-diketone surrogate. Isoxazoles are potent isosteres of pyridine and have been found to inhibit voltage-gated sodium channels for pain control, for the construction of tetracycline antibiotic derivatives, and as a therapeutic agent for depression.COA of Formula: C23H27FN4O3

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Lack of Smoking Effects on Pharmacokinetics of Oral Paliperidone-analysis of a Naturalistic Therapeutic Drug Monitoring Sample was written by Schoretsanitis, Georgios;Haen, Ekkehard;Conca, Andreas;Piacentino, Daria;Ridders, Florian;Hiemke, Christoph;Grunder, Gerhard;Paulzen, Michael. And the article was included in Pharmacopsychiatry in 2021.Synthetic Route of C23H27FN4O3 This article mentions the following:

IntroductionMajor smoking effects have been reported for a series of psychotropic agents, mainly including substrates of CYP450 1A2, although smoking may also affect alternative metabolic pathways. To our knowledge, smoking effects on paliperidone pharmacokinetics have not been assessed yet. MethodsWe compared plasma concentrations of paliperidone as well as dose-corrected-plasma concentrations (C/D) from a naturalistic database between smokers and nonsmokers using nonparametrical tests, such as the Mann-Whitney U-test (MWU). Addnl., we compared light and heavy smokers with nonsmokers sep. ResultsComparing 55 smokers with 37 nonsmokers treated with oral paliperidone, no differences in the percentage of females, age, body weight, body mass index, and daily paliperidone dose were reported (p=0.709 for χ ², p=0.26, p=0.38, p=0.67, and p=0.8 for MWU). No differences were detected in plasma concentrations or C/D values (p=0.50 and p=0.96 for MWU). Likewise, differences in daily dose, plasma concentrations, or C/D values were not significant between light smokers (n=17) and nonsmokers (p=0.61, p=0.81, and p=0.33 for MWU) or heavy smokers (n=22) and nonsmokers (p=0.874, p=0.38, and p=0.59; MWU in all cases). DiscussionPaliperidone is not affected by smoking, and paliperidone dose-adjustments in smokers may not be necessary. This may be seen as an essential difference to risperidone, whose cytochrome-mediated metabolism might be affected by smoking. In the experiment, the researchers used many compounds, for example, 3-(2-(4-(6-Fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (cas: 144598-75-4Synthetic Route of C23H27FN4O3).

3-(2-(4-(6-Fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (cas: 144598-75-4) belongs to isoxazole derivatives. Isoxazole are described as inhibitors of acetylcholinesterase (AChE). Isoxazole ligands bind to and inhibit the Sxc- antiporter. Some alternative routes for the synthesis of isoxazoles have also been developed and reported. The 2-benzoyl-2-halo-2H-azirines provide 4-haloisoxazoles in good yields after heating in toluene at reflux temperature.Synthetic Route of C23H27FN4O3

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Bromodomain and extra-terminal (BET) inhibitors in treating myeloid neoplasms was written by Chen, Natalie Cheng;Borthakur, Gautam;Pemmaraju, Naveen. And the article was included in Leukemia & Lymphoma in 2021.Application In Synthesis of (S)-2-(6-(4-Chlorophenyl)-1-methyl-4H-benzo[c]isoxazolo[4,5-e]azepin-4-yl)acetamide This article mentions the following:

With improved understanding of the epigenetic alterations underlying cancer development, numerous novel agents targeting pathways involved in epigenetic modifications and transcription including bromodomain inhibitors are under active investigation. We aim to discuss epigenetic modulation with a focus on bromodomain extra-terminal inhibitors (BETi) in the treatment of myeloid neoplasms. Since the first proof-of-concept description of BETi synthesis and its antineoplastic effect, approx. 20 BETi have been generated and many of them are studied in the context of cancer treatment. Emerging pre-clin. and early clin. studies suggest that BETi may have activity in the management of many hematol. malignancies including acute myeloid leukemia (AML), blastic plasmacytoid dendritic cell neoplasm (BPDCN), myeloproliferative neoplasm (MPNs), and lymphoma. We comprehensively reviewed and summarized preclin. and clin. data on BETi in treating myeloid neoplasms. In the experiment, the researchers used many compounds, for example, (S)-2-(6-(4-Chlorophenyl)-1-methyl-4H-benzo[c]isoxazolo[4,5-e]azepin-4-yl)acetamide (cas: 1380087-89-7Application In Synthesis of (S)-2-(6-(4-Chlorophenyl)-1-methyl-4H-benzo[c]isoxazolo[4,5-e]azepin-4-yl)acetamide).

(S)-2-(6-(4-Chlorophenyl)-1-methyl-4H-benzo[c]isoxazolo[4,5-e]azepin-4-yl)acetamide (cas: 1380087-89-7) belongs to isoxazole derivatives. Isoxazoles present in various natural products and synthetic compounds of biological importance like antibacterial, antagonists, antiinflammatory, analgesics, and also show the applications in functional materials. Some alternative routes for the synthesis of isoxazoles have also been developed and reported. The 2-benzoyl-2-halo-2H-azirines provide 4-haloisoxazoles in good yields after heating in toluene at reflux temperature.Application In Synthesis of (S)-2-(6-(4-Chlorophenyl)-1-methyl-4H-benzo[c]isoxazolo[4,5-e]azepin-4-yl)acetamide

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Oxygen-17 nuclear magnetic resonance study of some five-membered heterocyclic derivatives was written by Chimichi, Stefano;Nesi, Rodolfo;De Sio, Francesco. And the article was included in Organic Magnetic Resonance in 1984.Recommanded Product: 5765-44-6 This article mentions the following:

¹⁷O NMR spectra were obtained in the Fourier-transform mode for some furan and isoxazole derivatives The chem. shifts, mainly governed by the electronegativities of the atoms bonded to the central O, are also affected by alkylation on the different positions of the ring systems, which gives rise to β and γ effects similar to those observed for simple aliphatic ethers. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6Recommanded Product: 5765-44-6).

5-Methylisoxazole (cas: 5765-44-6) belongs to isoxazole derivatives.Synthetically, isoxazoles serve as valuable precursors for the construction of diverse molecules, including many natural products. As with isoxazolines, isoxazoles may be cleaved using low-valent titanium obtained from the Kulinkovich reaction.This procedure affords enaminoketones from 2,4-substituted isoxazoles.Recommanded Product: 5765-44-6

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Tautomerism of 5-aminoisoxazoles was written by Adembri, G.;Belgodere, E.;Speroni, G.;Tedeschi, P.. And the article was included in Bollettino Scientifico della Facolta di Chimica Industriale di Bologna in 1965.Safety of Isoxazol-5-amine This article mentions the following:

The uv spectra of 5-aminoisoxazoles were compared with the uv spectra of 2-methyl-5-iminoisoxazolones and of 5-dimethyl-aminoisoxazoles. The comparison shows that only the amino tautomer exists of the 5-aminoisoxazoles, regardless of other substituents and conditions. Some of the investigated compounds were synthesized. A solution of 3 g. acetylphenylacetonitrile in 12 ml. EtOH was combined with a solution of 2.1 g. NH₂OH.HCl in 12 ml. H₂O and heated 30 min. The mixture was diluted with H₂O to 4/3 the initial volume and again heated 20-25 min., allowed to cool, and poured on ice. Aqueous NaOH (2N) liberates 3-methyl-4-phenyl-5-aminoisoxazole, which was recrystallized from CCl₄ (m. 69-71°). A mixture of 3 g. formylphenylacetonitrile and 2.6 g. MeNHOH.HCl, dissolved in min. H₂O, is dissolved in min. EtOH. The solution is heated 30 min. and the solvent evaporated in vacuo. The residue is dissolved in acetone, precipitated by addition of H₂O, and recrystallized twice from aqueous acetone. The product is 2-methyl-4-phenyl-5-isoxazolonimideHCl.2H₂O, m. 144° (decomposition). Similarly, were prepared 2,3-dimethyl-4-phenyl-5-isoxazolonimide-HCl.H₂O, m. 173-5° (picrate m. 183-4°), 2-methyl-3-phenyl-5-isoxazolonimide-HCl.H₂O, m. 165° (decomposition), 2,4-dimethyl-3-phenyl-5-isoxazolonimide-HCl.H₂O, m. 196-197° (picrate m. 130-2°). To 8 ml. of a 21% solution of Me₂NH in benzene is added 2.25 g. 3-methyl-4-phenyl-5-chloroisoxazole and the mixture is heated at 100° for 4 hrs., Me₂NH.HCl is removed by filtration and the benzene is evaporated; 3-methyl-4-phenyl-5-dimethylaminoisoxazole is extracted from the residue and recrystallized from aqueous EtOH, m. 60-1°. Similarly are prepared 3-phenyl-5-dimethylaminoisoxazole, m. 80-1°, and 3-phenyl-4-methyl-5-dimethylaminoisoxazole, m. 64-5°. α-Methyl-α-benzoylpropionitrile (0.5 g.) was converted to the oxime by keeping two days in EtOH solution with NH₂OH.HCl. The oxime was recrystallized from benzene, m. 159-60°. In the experiment, the researchers used many compounds, for example, Isoxazol-5-amine (cas: 14678-05-8Safety of Isoxazol-5-amine).

Isoxazol-5-amine (cas: 14678-05-8) belongs to isoxazole derivatives. Isoxazoles are aromatic heterocycles containing an N–O bond. The weakness of this bond allows the ring opening of these heterocycles under reductive conditions. Isoxazole can be synthesised via a variety of methods. Examples include via the reaction of hydroxylamine with 1,3-diketones or derivatives of propiolic acid.Safety of Isoxazol-5-amine

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Development and Validation of a First-Derivative Spectrophotometric Method for the Estimation of an Antipsychotic Drug in Pharmaceutical Formulations and Forced Degradation Studies was written by Dash, S. K.;Acharjya, S. K.;Das, P. S.;Kumar, N. K.;Patra, Ch. N.. And the article was included in Journal of Applied Spectroscopy in 2022.Formula: C23H27FN4O3 This article mentions the following:

A simple, cost-effective, and stability-indicating first-derivative spectrophotometric technique for quantifying Paliperidone in different pharmaceutical formulations is developed. In this method, the drug shows a maximum dA/dλ at 245 nm. The drug follows Beer-Lambert’s law in the concentration range 2.5-70μg/mL. Various degradation studies for the drug, such as acid hydrolysis, base hydrolysis, thermal, oxidative, and photolytic degradation are performed, and the results thereof are within the acceptable limit. The anal. method validation parameters like linearity, LOD, LOQ, precision, accuracy, etc. are conducted for the method as per the ICH Q2R(1) guideline, and the values are within the allowable range. Hence, for the determination of the Paliperidone quantity in pharmaceutical dosage forms, the developed process is a feasible one. In the experiment, the researchers used many compounds, for example, 3-(2-(4-(6-Fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (cas: 144598-75-4Formula: C23H27FN4O3).

3-(2-(4-(6-Fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (cas: 144598-75-4) belongs to isoxazole derivatives.Synthetically, isoxazoles serve as valuable precursors for the construction of diverse molecules, including many natural products. Isoxazole can be synthesised via a variety of methods. Examples include via the reaction of hydroxylamine with 1,3-diketones or derivatives of propiolic acid.Formula: C23H27FN4O3

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Synthesis of isoxazolium salts unsubstituted in the 3-position was written by Wilson, B. D.;Burness, D. M.. And the article was included in Journal of Organic Chemistry in 1966.Recommanded Product: 5765-44-6 This article mentions the following:

A variety of isoxazoles unsubstituted in the 3-position were prepared and alkylated to form highly reactive isoxazolium salts, which are potentially useful as peptide bond-forming reagents. A few are inner salts related to Woodward’s reagent K. The explosive nature of isoxazolium perchlorates is revealed. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6Recommanded Product: 5765-44-6).

5-Methylisoxazole (cas: 5765-44-6) belongs to isoxazole derivatives. Isoxazole are described as inhibitors of acetylcholinesterase (AChE). Isoxazole ligands bind to and inhibit the Sxc- antiporter. The most common methods for N–O bond cleavage in isoxazoles are hydrogenation with palladium or platinum catalysts or with Raney Ni. Recent developments have shown that Mo(CO)6 efficiently cleaves the N–O bond in isoxazoles.Recommanded Product: 5765-44-6

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Identification of 1-(3-(6,7-Dimethoxyquinazolin-4-yloxy)phenyl)-3-(5-(1,1,1-trifluoro-2-methylpropan-2-yl)isoxazol-3-yl)urea Hydrochloride (CEP-32496), a Highly Potent and Orally Efficacious Inhibitor of V-RAF Murine Sarcoma Viral Oncogene Homologue B1 (BRAF) V600E was written by Rowbottom, Martin W.;Faraoni, Raffaella;Chao, Qi;Campbell, Brian T.;Lai, Andiliy G.;Setti, Eduardo;Ezawa, Maiko;Sprankle, Kelly G.;Abraham, Sunny;Tran, Lan;Struss, Brian;Gibney, Michael;Armstrong, Robert C.;Gunawardane, Ruwanthi N.;Nepomuceno, Ronald R.;Valenta, Ianina;Hua, Helen;Gardner, Michael F.;Cramer, Merryl D.;Gitnick, Dana;Insko, Darren E.;Apuy, Julius L.;Jones-Bolin, Susan;Ghose, Arup K.;Herbertz, Torsten;Ator, Mark A.;Dorsey, Bruce D.;Ruggeri, Bruce;Williams, Michael;Bhagwat, Shripad;James, Joyce;Holladay, Mark W.. And the article was included in Journal of Medicinal Chemistry in 2012.COA of Formula: C4H3F3N2O This article mentions the following:

The Ras/RAF/MEK/ERK mitogen-activated protein kinase (MAPK) signaling pathway plays a central role in the regulation of cell growth, differentiation, and survival. Expression of mutant BRAF^V600E results in constitutive activation of the MAPK pathway, which can lead to uncontrolled cellular growth. Herein, we describe an SAR optimization campaign around a series of quinazoline derived BRAF^V600E inhibitors. In particular, the bioisosteric replacement of a metabolically sensitive tert-Bu group with fluorinated alkyl moieties is described. This effort led directly to the identification of a clin. candidate 1-(3-(6,7-dimethoxyquinazolin-4-yloxy)phenyl)-3-(5-(1,1,1-trifluoro-2-methylpropan-2-yl)isoxazol-3-yl)urea hydrochloride (CEP-32496, I). CEP-32496 exhibits high potency against several BRAF^V600E-dependent cell lines and selective cytotoxicity for tumor cell lines expressing mutant BRAF^V600E vs. those containing wild-type BRAF. It also exhibits an excellent PK profile across multiple preclin. species. In addition, significant oral efficacy was observed in a 14-day BRAF^V600E-dependent human Colo-205 tumor xenograft mouse model, upon dosing at 30 and 100 mg/kg BID. In the experiment, the researchers used many compounds, for example, 3-(Trifluoromethyl)isoxazol-5-amine (cas: 108655-63-6COA of Formula: C4H3F3N2O).

3-(Trifluoromethyl)isoxazol-5-amine (cas: 108655-63-6) belongs to isoxazole derivatives. Isoxazole are described as inhibitors of acetylcholinesterase (AChE). Isoxazole ligands bind to and inhibit the Sxc- antiporter. The most common methods for N–O bond cleavage in isoxazoles are hydrogenation with palladium or platinum catalysts or with Raney Ni. Recent developments have shown that Mo(CO)6 efficiently cleaves the N–O bond in isoxazoles.COA of Formula: C4H3F3N2O

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Direct nitration of five membered heterocycles was written by Katritzky, Alan R.;Scriven, Eric F. V.;Majumder, Suman;Akhmedova, Rena G.;Akhmedov, Novruz G.;Vakulenko, Anatoliy V.. And the article was included in ARKIVOC (Gainesville, FL, United States) in 2005.Product Details of 5765-44-6 This article mentions the following:

Direct nitration of a variety of furans, pyrroles, thiophenes, pyrazoles, imidazoles, isoxazoles and thiazoles (17 compounds) with nitric acid/trifluoroacetic anhydride affords mononitro derivatives in average yield of 60%. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6Product Details of 5765-44-6).

5-Methylisoxazole (cas: 5765-44-6) belongs to isoxazole derivatives. Isoxazoles present in various natural products and synthetic compounds of biological importance like antibacterial, antagonists, antiinflammatory, analgesics, and also show the applications in functional materials. Fe(CO)5 efficiently cleaves the N–O bond of fused isoxazolo-1,4-quinones to give the corresponding imines.All the common reducing reagents failed to open the isoxazole ring.Product Details of 5765-44-6

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem