Category: isoxazole

New method for synthesis of methyl-ketone compounds containing heterocycle was written by Luan, Anbo;Zhao, Tianyi;Huang, Qiran;Yang, Weihe. And the article was included in Guangdong Huagong in 2008.Application of 19668-85-0 This article mentions the following:

A method for the synthesis of the title compounds is reported here. Ketone compounds containing Me and heterocyclic substituents were prepared from corresponding acids by a condensation reaction with acetic anhydride. The reaction was easily carried out and the yields were 45-81%. The experiment results showed that the reaction did not proceed if the starting material did not contain an α-hydrogen. In the experiment, the researchers used many compounds, for example, 3-Methylisoxazole-5-acetic Acid (cas: 19668-85-0Application of 19668-85-0).

3-Methylisoxazole-5-acetic Acid (cas: 19668-85-0) 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 a 1,3-dipolar cycloaddition of nitrile oxides with alkynes.Application of 19668-85-0

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

A review of sitaxsentan sodium in patients with pulmonary arterial hypertension was written by Waxman, Aaron B.. And the article was included in Vascular Health and Risk Management in 2007.Electric Literature of C18H14ClN2NaO6S2 This article mentions the following:

Pulmonary arterial hypertension (PAH) is a life threatening, progressive condition which eventually leads to fatal right heart failure. Endothelin-1 (ET-1), a potent vasoconstrictor peptide, is increased in the pulmonary arteries of patients with pulmonary hypertension. Endothelin-1 acts through the stimulation of 2 subtypes of receptors (endothelin receptor subtypes A [ET_A] and B [ET_B]). In PAH patients, ETRAs block the deleterious vasoconstrictor effects of ET-1, and ETRA treatment in PAH patients has been shown to be safe and efficacious. Sitaxsentan is an orally active, highly ET_A selective ETRA that, in clin. trials, has demonstrated improvements in exercise capacity, functional class and hemodynamics in PAH patients. Sitaxsentan has been shown to be safe, well tolerated, and associated with a lower incidence of liver toxicity than other approved ETRAs. In the experiment, the researchers used many compounds, for example, Sodium (4-chloro-3-methylisoxazol-5-yl)((2-(2-(6-methylbenzo[d][1,3]dioxol-5-yl)acetyl)thiophen-3-yl)sulfonyl)amide (cas: 210421-74-2Electric Literature of C18H14ClN2NaO6S2).

Sodium (4-chloro-3-methylisoxazol-5-yl)((2-(2-(6-methylbenzo[d][1,3]dioxol-5-yl)acetyl)thiophen-3-yl)sulfonyl)amide (cas: 210421-74-2) 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.Electric Literature of C18H14ClN2NaO6S2

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Modelling mutagenicity using properties calculated by computational chemistry was written by Livingstone, D. J.;Greenwood, R.;Rees, R.;Smith, M. D.. And the article was included in SAR and QSAR in Environmental Research in 2002.Name: 5-Methylisoxazole This article mentions the following:

The recent advances in combinatorial chem. and high throughput screening technologies have led to an explosion in the numbers of possible therapeutic candidates being produced at the early stages of drug discovery. This rapid increase in the number of chems. to be classified results in a greater need for alternative methods for the prediction of toxicity. Most QSAR models for mutagenicity have been constructed for congeneric series. The prediction requirements of the pharmaceutical industry, however, cover quite diverse chem. structures. This paper reports a study of mutagenicity data for a diverse set of 90 compounds Good discriminant models have been built for this data set using properties calculated by the techniques of computational chem. Jack-knifed (leave one out) predictions for these models are of the order of 85%. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6Name: 5-Methylisoxazole).

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. 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.Name: 5-Methylisoxazole

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Gold-Catalyzed [4 + 1]-Annulation Reactions between 1,4-Diyn-3-ols and Isoxazoles To Construct a Pyrrole Core was written by Kardile, Rahul Dadabhau;Kale, Balaji S.;Sharma, Pankaj;Liu, Rai-Shung. And the article was included in Organic Letters in 2018.Application In Synthesis of 5-Methylisoxazole This article mentions the following:

This work reports gold-catalyzed [4 + 1]-annulation reactions between 1,4-diyn-3-ols and isoxazoles or benzisoxazoles to yield pyrrole derivatives The reaction chemoselectivity is controlled by an initial attack of an isoxazole at a less hindered alkyne to form gold carbenes, further inducing a 1,2-migration of a second alkyne group. A broad substrate scope of 1,4-diyn-3-ols, isoxazoles and even benzisoxazoles highlighted the reaction utility. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6Application In Synthesis of 5-Methylisoxazole).

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.Application In Synthesis of 5-Methylisoxazole

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Stability and structure of transition metal complexes with azoles in aqueous solution. Part IX. 5-Methylisoxazole complexes of cobalt(II), nickel(II), copper(II), zinc(II) and silver(I) was written by Lenarcik, Beniamin;Kulig, Jacek. And the article was included in Roczniki Chemii in 1977.Category: isoxazole This article mentions the following:

The stability and the structure of Co, Ni, Cu, Zn, and Ag complexes with 5-methylisoxazole was studied by the competitive potentiometric method using a Ag/Ag+ electrode and by measurements of absorption spectra. In all cases only 2 unstable complexes of composition ML and ML2 (L=5-methylisoxazole) were formed. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6Category: isoxazole).

5-Methylisoxazole (cas: 5765-44-6) 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. 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.Category: isoxazole

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Endothelin Receptor Antagonists are an Effective Long Term Treatment Option in Pulmonary Arterial Hypertension Associated with Congenital Heart Disease With or Without Trisomy 21 was written by Kermeen, F. D.;Franks, C.;O’Brien, K.;Seale, H.;Hall, K.;McNeil, K.;Radford, D.. And the article was included in Heart, Lung and Circulation in 2010.Application In Synthesis of Sodium (4-chloro-3-methylisoxazol-5-yl)((2-(2-(6-methylbenzo[d][1,3]dioxol-5-yl)acetyl)thiophen-3-yl)sulfonyl)amide This article mentions the following:

Traditionally, treatment options for patients with pulmonary arterial hypertension associated with congenital heart disease (PAH-CHD) are limited. Bosentan has been shown to improve pulmonary haemodynamics and exercise tolerance short term but long term clin. studies are lacking. To report long term efficacy and safety data with endothelin receptor antagonists (ERA) in patients with PAH associated CHD. Prospective, open label, uncontrolled, single center study of 53 patients (33 females, 17 Trisomy 21, mean age 34 ± 12 years) prescribed ERA (48 bosentan, 5 sitaxentan) from 2003 to August 2009. Outcome measurements of oxygen saturation (SaO2), WHO functional class, 6-min walk test distance (6MWD) and adverse events were analyzed. Mean duration of therapy was 15 ± 13 mo in 53 patients with CHD. Four patients failed ERA, seven died (five progressive RHF) and one delisted from transplantation. No abnormal liver transaminases occurred on bosentan, with one case on sitaxentan. After 3, 6, 12, 18 and 24 mo of treatment a significant improvement was seen in WHO functional class (mean 3.15 vs 2.8 vs 2.5 vs 2.5 vs 2.4 vs 2.4; p < 0.01) and 6MWD (344 ± 18 vs 392 ± 17 vs 411 ± 17 vs 420 ± 17 vs 442 ± 18 vs 417 ± 23: p < 0.0005, p < 0.01) compared with baseline. The Trisomy 21 and PAH-CHD showed a significant improvement in 6MWD at 6 and 12 mo (263 ± 24 vs 348 ± 29 vs 360 ± 32, p < 0.01, p < 0.05) resp. No changes in SaO2, BNP, RV or LV function were demonstrated during follow-up. This large single center study demonstrates that endothelin receptor antagonism is an effective and safe treatment in PAH associated CHD with or without Trisomy 21. The improvements in exercise tolerance are similar to reported benefits in other forms of PAH. In the experiment, the researchers used many compounds, for example, Sodium (4-chloro-3-methylisoxazol-5-yl)((2-(2-(6-methylbenzo[d][1,3]dioxol-5-yl)acetyl)thiophen-3-yl)sulfonyl)amide (cas: 210421-74-2Application In Synthesis of Sodium (4-chloro-3-methylisoxazol-5-yl)((2-(2-(6-methylbenzo[d][1,3]dioxol-5-yl)acetyl)thiophen-3-yl)sulfonyl)amide).

Sodium (4-chloro-3-methylisoxazol-5-yl)((2-(2-(6-methylbenzo[d][1,3]dioxol-5-yl)acetyl)thiophen-3-yl)sulfonyl)amide (cas: 210421-74-2) belongs to isoxazole derivatives. Isoxazole rings are found in some natural products, such as ibotenic acid and muscimol. The electrophilic cyclization of various 2-alkynone O-methyl oximes with a wide range of substrates such as ICl, I2, Br2, PhSeBr, etc. provides a variety of 3,4,5-trisubstituted isoxazoles in good to excellent yields.Application In Synthesis of Sodium (4-chloro-3-methylisoxazol-5-yl)((2-(2-(6-methylbenzo[d][1,3]dioxol-5-yl)acetyl)thiophen-3-yl)sulfonyl)amide

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

The effect of berberine adjunctive treatment on glycolipid metabolism in patients with schizophrenia: A randomized, double-blind, placebo-controlled clinical trial was written by Li, Meijuan;Liu, Ying;Qiu, Yuying;Zhang, Jing;Zhang, Yonghui;Zhao, Yongping;Jia, Qiong;Li, Jie. And the article was included in Psychiatry Research in 2021.Reference of 144598-75-4 This article mentions the following:

Previous studies have shown that berberine can improve metabolic disturbances in non-psychiatric patients, but no clin. research has been conducted in schizophrenia. This study was a randomized, double-blind, placebo-controlled clin. trial. Eligible patients diagnosed with schizophrenia were randomized to receive placebo or berberine (900mg/day) as an adjunctive treatment for eight weeks. Peripheral glycolipid metabolism parameters were measured at baseline, week 4, and week 8. Sixty-five patients were included, and forty-nine patients completed the 8-wk trial. Berberine led to significant declines in total cholesterol, low-d. lipoprotein cholesterol, fasting serum insulin, and insulin resistance(all p<0.05) compared with placebo. Baseline body mass index and serum prolactin concentration could predict the effect of berberine on insulin resistance. Berberine adjunctive treatment may reduce the risk of glycolipid metabolic disturbances in patients with schizophrenia. 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: 144598-75-4Reference of 144598-75-4).

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. 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.Reference of 144598-75-4

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Stability and structure of transition metal complexes with azoles in aqueous solutions. Part XVIII. Comparison of complex-forming ability of pyrazoles, isothiazoles and isoxazoles was written by Kulig, Jacek;Lenarcik, Beniamin. And the article was included in Polish Journal of Chemistry in 1978.COA of Formula: C4H5NO This article mentions the following:

Stability constants were determined potentiometrically for isoxazole and isothiazole complexes of Co(II), Ni(II), Cu(II), Zn(II) and Ag(I) at a constant ionic strength (0.5; KNO₃) at 25°. The stability of the azole complexes containing two hetero atoms at positions 1 and 2 of the heterocyclic ring is discussed. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6COA of Formula: C4H5NO).

5-Methylisoxazole (cas: 5765-44-6) belongs to isoxazole derivatives. Isoxazoles also form the basis for a number of drugs, including the COX-2 inhibitor valdecoxib (Bextra) and a neurotransmitter agonist AMPA. 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: C4H5NO

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

Syntheses with isoxazoles. II. Rearrangement of isoxazolo[2,3-a]pyridinium salts into 5,6-dihydro-4H-furo[3,2-b]pyridin-2-ones was written by Good, R. H.;Jones, Gurnos;Phipps, J. R.. And the article was included in Journal of the Chemical Society, Perkin Transactions 1 in 1972.Synthetic Route of C7H9NO3 This article mentions the following:

The 4,5,6,7-tetrahydro-4-oxoisoxazolo[2,3-a]pyridinium bromides (I, R = H, Me) on brief treatment with boiling Ac2O gave the 5,6-dihydro-4H-furo[3,2-b]pyridin-2-ones (II, R = H, Me, resp.); rearrangement via a ketene intermediate was suggested. The 5-bromo derivative of (I, R = H) in boiling Ac2O underwent cleavage of either the pyridine or the isoxazole ring. The mol. structure of II (R = H) was determined by x-ray crystallog. In the experiment, the researchers used many compounds, for example, Ethyl 4-methylisoxazole-3-carboxylate (cas: 38061-69-7Synthetic Route of C7H9NO3).

Ethyl 4-methylisoxazole-3-carboxylate (cas: 38061-69-7) 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.Synthetic Route of C7H9NO3

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem

The reactions of 3-unsubstituted isoxazolium salts with 1,2-dinucleophiles. Synthesis of 4-functionalized 3-aminoisoxazoles with 3-aminopyrazoles was written by Alberola, A.;Antolin, L. F.;Cuadrado, P.;Gonzalez, A. M.;Laguna, M. A.;Pulido, F. J.. And the article was included in Synthesis in 1988.Reference of 5765-44-6 This article mentions the following:

Cyclization of isoxazolium salts I (R¹ = Me, Ph; R² = Et, Me₃C; R³ = H, Cl, Br, NO₂, Ac, CO₂Et; X = ClO₄, BF₄) with NH₂OH or RNHNH₂ (R = H, Me, Ph, p-O₂HC₆H₄, CONH₂) gave 42-98% 66 II (Z = O, RN), resp. In the experiment, the researchers used many compounds, for example, 5-Methylisoxazole (cas: 5765-44-6Reference of 5765-44-6).

5-Methylisoxazole (cas: 5765-44-6) belongs to isoxazole derivatives. Isoxazoles also form the basis for a number of drugs, including the COX-2 inhibitor valdecoxib (Bextra) and a neurotransmitter agonist AMPA. 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.Reference of 5765-44-6

Referemce:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem