Heterocyclic Building Blocks-isoxazole

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.36958-61-9,5-(Bromomethyl)-3-methylisoxazole,as a common compound, the synthetic route is as follows.

General procedure: Amine (0.25 mmol), and bromide (0.25 mmol) were taken up in acetonitrile (0.3 mL) in a conical vial equipped with a stirrer bar. Potassium carbonate (0.5 mmol) was added followed by potassium iodide (10 mol%) if required. The vial was sealed with a screwcap and the reaction was stirred at 40 C until thin layer chromatography (TLC) indicated complete consumption of the starting materials. A precipitate was formed during the reaction which was removed by filtration and the filtrate concentrated under reduced pressure. The residue was purified by flash column chromatography and sent to the Netherlands Cancer Institute (NKI) for biological testing.

36958-61-9, 36958-61-9 5-(Bromomethyl)-3-methylisoxazole 10607354, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Article; Milne, Kirsty; Sun, Jianhui; Zaal, Esther A.; Mowat, Jenna; Celie, Patrick H.N.; Fish, Alexander; Berkers, Celia R.; Forlani, Giuseppe; Loayza-Puch, Fabricio; Jamieson, Craig; Agami, Reuven; Bioorganic and Medicinal Chemistry Letters; vol. 29; 18; (2019); p. 2626 – 2631;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

3405-77-4, 5-Methylisoxazole-3-carboxylic acid is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,3405-77-4

(R)-Methyl 3-(5-methyl isoxazole-3-carboxamido)-2,3-dihydro-1H-indene-5-carboxylate (B-25)HATU (4.4 g, 11.7 mmol, 1.5 eq) and DIPEA (3.0 ml, 15.6 mmol, 2 eq) were added to an ice-cooled solution of 5-methylisoxazole-3-carboxylic acid (990 mg, 7.8 mmol, 1 eq) in dichloromethane (80 ml), and stirring was carried out for 30 min. (R)-Methyl 3-amino-2,3-dihydro-1H-indene-5-carboxylate (A-07) (7.8 mmol, 1 eq) was dissolved in dichloromethane (20 ml) and added dropwise to the reaction solution, and stirring was carried out for 16 h at RT.The reaction solution was diluted with dichloromethane (250 ml), washed with sat. sodium hydrogen carbonate solution (50 ml), sat. ammonium chloride solution (50 ml), water (50 ml) and sat. NaCl solution (50 ml), dried over sodium sulfate and concentrated under reduced pressure.After purification by column chromatography (silica gel, 2percent MeOH in dichloro-methane), the desired product was obtained in the form of a yellowish solid. Yield: 68percent (1.6 g, 5.3 mmol).

3405-77-4 5-Methylisoxazole-3-carboxylic acid 76947, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Patent; GRUENENTHAL GmbH; US2012/71461; (2012); A1;,
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Isoxazole | C3H3NO – PubChem

3356-89-6, 5-Chloro-3-phenylisoxazole is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a stirred suspension of NaH (60% in mineral oil, 440 mg, 11 mmol, prewashed with hexane) in anhydrous THF (20 mL) was added the appropriate alcohol (15 mmol) at r.t. and the reaction mixture was stirred for 0.5 h. Next, 5-chloro-3-phenylisoxazole (2) (1.0 g, 5.6mmol) was introduced as a solid and the mixture was refluxed for 1 h. After cooling to r.t., the mixture was quenched with H2O (20 mL). For 4a and 4b, the resulting precipitate was collected, washed with H2O and recrystallized from hexane-Et2O mixture. For 3a, the reaction mixture was extracted with CH2Cl2 (3 ¡Á 20 mL). The combined organic layers were dried (Na2SO4) and concentrated in vacuo to give isoxazole 3a. 5-tert-Butoxy-3-phenylisoxazole (4c) was synthesized analogously using commercially available potassium tert-butoxide.

3356-89-6, The synthetic route of 3356-89-6 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Rostovskii, Nikolai V.; Agafonova, Anastasiya V.; Smetanin, Ilia A.; Novikov, Mikhail S.; Khlebnikov, Alexander F.; Ruvinskaya, Julia O.; Starova, Galina L.; Synthesis; vol. 49; 19; (2017); p. 4478 – 4488;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.110256-15-0,5-Cyclopropylisoxazole-3-carboxylic acid,as a common compound, the synthetic route is as follows.

A suspension of 5-cyclopropylisoxazole-3-carboxylic acid (5.00 g, 32.7 mmol) in DCM (30 mL) was treated sequentially with oxalyl chloride (7.15 mL, 81.6 mmol) and DMF (30 muL, 32.7 mmol). The reaction mixture was stirred for 1.5 h at RT, and then concentrated. The resulting residue was suspended in THF (65.3 mL), cooled to 0 C, and then treated with malononitrile (2.59 g, 39.2 mmol) and DIPEA (14.3 mL, 81.6 mmol). After stirring the reaction mixture for 48 h at 0 C, and 2 h at RT, dimethyl sulfate (9.36 mL, 98.0 mmol) was added. The resulting reaction mixture was stirred at 70 C until LCMS indicated complete consumption of starting materials. The mixture then was cooled to RT, and diluted with water (50 mL). The aqueous mixture was extracted with EtOAc. The combined organic extracts were concentrated. The resulting residue was purified by silica chromatography (0-20% EtOAc in hexanes) to afford the title compound (2.27 g, 32%)., 110256-15-0

The synthetic route of 110256-15-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ARRAY BIOPHARMA INC.; BLAKE, James F.; DAI, Donghua; HAAS, Julia; JIANG, Yutong; KOLAKOWSKI,, Gabrielle R.; METCALF, Andrew T.; MORENO, David A.; PRIGARO, Brett; REN, Li; (330 pag.)WO2019/143991; (2019); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.325744-41-0,5-(Chloromethyl)-3-(4-methoxyphenyl)isoxazole,as a common compound, the synthetic route is as follows.

325744-41-0, General procedure: To a stirred solution of ?a? derivatives in freshly distilled CH2Cl2 under N2 atmosphere, at roomtemperature, thionyl chloride (1.5 eq) was added. The reactions were monitored by TLC and, at thetotal consumption of the starting material, they were quenched with cold water and extracted withCH2Cl2. Next, the crude products were solubilized in DMF followed by addition of sodium azide (1.5eq). The reactions were kept at room temperature until TLC analyses indicated the disappearance ofthe starting material, then, they were quenched with water and extracted with EtOAc. In the last step,the crude azide derivatives were solubilized in THF followed by addition of triphenylphosphine (1.5 eq).The reactions were maintained overnight at room temperature, quenched by addition of aqueousNa2CO3 [5% (m/v)] and extracted with EtOAc. The crude amine derivatives (compound d) were usedfor the synthesis of the isoxazolyl-sulfonamide derivatives 1-20 without any further purification.

The synthetic route of 325744-41-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; da Rosa, Rafael; Zimmermann, Lara Almida; de Moraes, Milene Hoeehr; Schneider, Naira Fernanda Zanchett; Schappo, Alice Duarte; Simoes, Claudia Maria de Oliveira; Steindel, Mario; Schenkel, Eloir Paulo; Bernardes, Lilian Sibelle Campos; Bioorganic and Medicinal Chemistry Letters; vol. 28; 20; (2018); p. 3381 – 3384;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.10557-85-4,3,5-Dimethyl-4-iodoisoxazole,as a common compound, the synthetic route is as follows.

A mixture of 4-bromophenylboronic acid (1 g, 5 mmol), 3,5-dimethyl-4-iodoisoxazole (0.93 g, 4.2 mmol), bis(triphenylphospine)palladium(II) chloride (59 mg, 2 mol %), NaHCO3 (1.06 g, 12.6 mmol) in DME (5 mL) and H2O (5 mL) was heated to 80 C. under N2 for 18 h. The reaction mixture was partitioned between 1 N HCl and EtOAc. The organic layer was washed with saturated NaHCO3, brine, dried over Na2SO4 and concentrated. The residue was purified by silica gel chromatography (5% EtOAc in hexanes) to give the title compound as a white solid (0.9 g, 86%). 1H NMR (CDCl3): delta 2.26 (s, 3H), 2.40 (s, 3H), 7.13 (d, 2H, J=8.3 Hz), 7.58 (d, 2H, J=8.3 Hz)., 10557-85-4

As the paragraph descriping shows that 10557-85-4 is playing an increasingly important role.

Reference£º
Patent; Agouron Pharmaceuticals, Inc.; US2005/176701; (2005); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2510-36-3,3,5-Dimethylisoxasole-4-carboxylic acid,as a common compound, the synthetic route is as follows.

General procedure: The aldehyde (0.8 equivalent) and amine (0.7 equivalent) were dissolved in methanol (2.0 mL) and stirred for two to 3 h depending upon the starting material. The acid (100 mg, 1 equivalent) and isocyanide (0.7 equivalent) were added in the reaction mixture and further stirred. The reaction mixture was monitored using TLC analysis.Water (4 mL) was added upon completion of the reaction.The resulted solid was filtered off and dissolved in ethyl acetate(10 mL), washed with water (2 3 mL) and dried over sodium sulphate. The crude product was purified using silica gel column chromatography. The ethyl acetate:hexane (6:4) solvent system was used for the purification of these compounds.

2510-36-3, The synthetic route of 2510-36-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Makane, Vitthal B.; Krishna, Vagolu Siva; Krishna, E. Vamshi; Shukla, Manjulika; Mahizhaveni; Misra, Sunil; Chopra, Sidharth; Sriram, Dharmarajan; Dusthackeer, V.N. Azger; Rode, Haridas B.; European Journal of Medicinal Chemistry; vol. 164; (2019); p. 665 – 677;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.206055-91-6,(3-(4-Bromophenyl)isoxazol-5-yl)methanol,as a common compound, the synthetic route is as follows.

General procedure: (0.184 g,1 mmol) was added into a 25 mL one-necked round-bottom flask with 5mL of dry iso-PrOH, and the mixture was stirred in a cold bath. Then a solution of Et3N (0.101 g, 1 mmol) and (3-phenyl-isoxazole-5-yl)-methanol (0.175 g, 1 mmol) in 10mL dry iso-PrOH was slowly added to the reaction system using a syringe. The mixture was stirred in a cold bath for an additional 30 min, and then tem-perature was allowed to reach room temperature. After reaction completion (monitored by thin layer chromatography, TLC), the reaction mixture was evaporated under reduced pressure, and the residue was purified by column chromatog-raphy on silica gel using petroleum ether and ethyl acetate (V/V, 5:1?2:1) as eluant. Fractions with similar Rf values were combined to obtain the target compound 3a., 206055-91-6

206055-91-6 (3-(4-Bromophenyl)isoxazol-5-yl)methanol 11032412, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Article; Yong, Jianping; Lu, Canzhong; Wu, Xiaoyuan; Letters in drug design and discovery; vol. 15; 5; (2018); p. 463 – 474;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

10557-85-4, 3,5-Dimethyl-4-iodoisoxazole is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A mixture of 4-bromophenylboronic acid (1G, 5MMOL), 3, 5-dimethyl-4-iodoisoxazole (0.93g, 4.2 MMOL), bis (triphenylphospine) palladium (LI) chloride (59mg, 2MOL%), NAHC03 (1.06g, 12. 6MMOL) in DME (5mL) and H20 (5mL) was heated to 80 C under N2 for 18h. The reaction mixture was partitioned between 1 N HCI and EtOAc. The organic layer was washed with saturated NAHC03, brine, dried over NA2SO4AND concentrated. The residue was purified by silica gel chromatography (5% EtOAc in hexanes) to give the title compound as a white solid (0.9g, 86%). H NMR (CDCl3) : No. 2. 26 (s, 3H), 2.40 (s, 3H), 7.13 (d, 2H, J = 8.3 Hz), 7.58 (d, 2H, J = 8.3 Hz)., 10557-85-4

10557-85-4 3,5-Dimethyl-4-iodoisoxazole 613883, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Patent; PFIZER INC.; WO2004/74270; (2004); A2;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

51135-73-0, Ethyl 5-methylisoxazole-4-carboxylate is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,51135-73-0

(iii) 5-Methylisoxazol-4-yl carboxylic acid Ethyl 5-methylisoxazol-4-yl carboxylate (65 g) was heated under reflux in 10 M HCl (500 ml) for 3 hours. On cooling the product crystallized out. This was filtered and dried giving 42 g of a white crystalline solid, m.p. 134-136 C.

As the paragraph descriping shows that 51135-73-0 is playing an increasingly important role.

Reference£º
Patent; Lilly Industries Limited; US4983619; (1991); A;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem