Category: 13708-12-8

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.13708-12-8,5-Methylquinoxaline,as a common compound, the synthetic route is as follows.

To a solution of 5-methylquinoxaline (9.50 g, 65.97 mmol) in CH3CN (80 mL) was added 1-bromopyrrolidine-2,5-dione (27.00 g, 151.74 mmol) at room temperature. The resulting solution was stirred for 16 h at 60 C. After cooling to room temperature, the reaction mixture was concentrated under reduced pressure and the residue was diluted with ethyl acetate (500 mL). The insoluble solids in the mixture were filtered out and the filtrate was washed with brine and dried over Na2504. The solvent was removed under reduced pressure to yield 5-bromo-8-methylquinoxaline as brown solid (6.00 g, 4 1%). MS: m/z = 222.9 [M+Hj .

13708-12-8, 13708-12-8 5-Methylquinoxaline 61670, aquinoxaline compound, is more and more widely used in various fields.

Reference£º
Patent; MERCK PATENT GMBH; SHERER, Brian A.; CHEN, Xiaoling; CLEARY, Esther; BRUGGER, Nadia; (198 pag.)WO2018/31434; (2018); A1;,
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13708-12-8, 5-Methylquinoxaline is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution of 5-methylquinoxaline (9.50 g, 66.0 mmol) in acetonitrile (80 mL) was added 1-bromopyrrolidine-2,5-dione (27.0 g, 151.7 mmol) at room temperature. The resulting solution was stirred for 16 h at 60 C. After cooling to room temperature, the reaction mixture was concentrated under reduced pressure and the residue was diluted with ethyl acetate (500 mL). The insoluble solids in the mixture were filtered out and the filtrate was washed with brine and dried over Na2SO4. The solvent was removed under reduced pressure to yield 5-bromo-8-methylquinoxaline as brown solid (6.00 g, 41%). MS: m/z=222.9 [M+H]+.

13708-12-8, As the paragraph descriping shows that 13708-12-8 is playing an increasingly important role.

Reference£º
Patent; Merck Patent GmbH; SHERER, Brian A.; BRUGGER, Nadia; LAN, Ruoxi; CHEN, Xiaoling; (60 pag.)US2019/23687; (2019); A1;,
Quinoxaline – Wikipedia
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13708-12-8, 5-Methylquinoxaline is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 1 A mixture of 10 parts of 5-methylquinoxaline, 10 parts of 1,3-dibromo-5,5-dimethylimidazolidine-2,4-dione, 1.7 parts of benzenecarboperoxoic acid and 318 parts of tetrachloromethane was stirred for 16 hours at reflux temperature under 2 lamps of 250 Watt. The reaction mixture was cooled and the organic layer was decanted. The product was filtered off and dried, yielding 15.5 parts (100%) of 5-(bromomethyl)quinoxaline (interm. 1)., 13708-12-8

As the paragraph descriping shows that 13708-12-8 is playing an increasingly important role.

Reference£º
Patent; Janssen Pharmaceutica N.V.; US5028606; (1991); A;,
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13708-12-8, 5-Methylquinoxaline is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

5-Methylquinoxaline (0.180 mL, 1.387 mmol, commercially available from, for example, Sigma-Aldrich), NBS (289 mg, 1.624 mmol), benzoyl peroxide (37 mg, 0.153 mmol) and 1,2- dichloroethane (4 mL) was stirred at 110 C for 2 h. Further portions of NBS (260 mg, 1.461 mmol)and benzoyl peroxide (31 mg, 0.128 mmol) were added and the reaction refluxed for a further 2 h. The solution was concentrated to give 1.1 g of a brown solid which was purified by chromatography on 5i02 (Biotage SNAP 50 g cartridge, eluting with O-100% diethylether/cyclohexane). The desired fractions were concentrated to give 5-(bromomethyl)quinoxaline (310 mg, 0.882 mmol, 63.6 % yield) as a yellow oil.LCMS (2 mm Formic): Rt=0.91 mi [MH] = 223, 225.

13708-12-8, 13708-12-8 5-Methylquinoxaline 61670, aquinoxaline compound, is more and more widely used in various fields.

Reference£º
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY (NO.2) LIMITED; ATKINSON, Stephen John; AYLOTT, Helen Elizabeth; COOPER, Anthony William James; DEMONT, Emmanuel Hubert; HARRISON, Lee Andrew; HAYHOW, Thomas George Christopher; LINDON, Matthew J; PRESTON, Alexander G; SEAL, Jonathan Thomas; WALL, Ian David; WATSON, Robert J; WOOLVEN, James Michael; (308 pag.)WO2017/37116; (2017); A1;,
Quinoxaline – Wikipedia
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.13708-12-8,5-Methylquinoxaline,as a common compound, the synthetic route is as follows.

Reference Example 74 2-[N-(3-Cyanophenyl)-N-(5-quinoxalinylmethyl)amino]-N-[4-(1-trifluoroacetylpiperidin-4-yl)phenyl]acetamide 5-Methylquinoxaline (710 mg) and 920 mg of N-bromosuccinimide were dissolved in 8 ml of carbon tetrachloride, 50 mg of 2,2′-azobis(isobutyronitrile) was added to the solution, and the mixture was heated under reflux under an argon atmosphere for 5 hours. The reaction mixture was concentrated under reduced pressure, and the resulting residue was dissolved in 8 ml of isopropanol. To the solution were added 0.60 ml of N-ethyldiisopropylamine, 418 mg of sodium iodide and 1.0 g of 2-(3-cyanophenylamino)-N-[4-(1-trifluoroacetylpiperidin-4-yl)phenyl]acetamide, and the mixture was heated under reflux for 45 hours. The reaction mixture was concentrated under reduced pressure, and the resulting residue was purified by silica gel column chromatography (eluent: ethyl acetate-hexane) to give 560 mg of 2-[N-(3-cyanophenyl)-N-(5-quinoxalinylmethyl)amino]-N-[4-(1-trifluoroacetylpiperidin-4-yl)phenyl]acetamide. 1H-NMR(CDCl3) delta ppm: 1.56-1.72 (2H, m), 1.85-2.00 (2H, m), 2.70-2.93 (2H, m), 3.16-3.30 (1H, m), 4.05-4.17 (1H, m), 4.21 (2H, s), 4.60-4.72 (1H, m), 5.33 (2H, s), 7.00-7.19 (5H, m), 7.23-7.38 (3H, m), 7.53-7.61 (1H, m), 7.70-7.80 (1H, m), 8.05-8.26 (2H, m), 8.80-8.94 (2H, m)

13708-12-8, The synthetic route of 13708-12-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Kissei Pharmaceutical Co., Ltd.; EP1020434; (2000); A1;,
Quinoxaline – Wikipedia
Quinoxaline | C8H6N2 | ChemSpider

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.13708-12-8,5-Methylquinoxaline,as a common compound, the synthetic route is as follows.

General procedure: N-heteroarene (1 mmoL, 80 mg), alpha-keto acid (3 mmol), Formic acid (1 mmol, 38 muL), ammonium persulfate (3 mmoL, 685 mg), ferrous sulfate heptahydrate (0.08 mmoL, 22 mg) and 20 mL of mixed solvent (DCM: H2O = 3: 1) , 0.1 mL DMSO was added into a 25 mL round-bottomed flask. The mixture was stirred at 40 oC until TLC analysis indicating that the reaction was complete (witnessed by the disappearance of the N-heteroarene). After separation of organic phase, the residue was neutralized by 0.1 M sodium hydroxide solution, then extracted with DCM (3¡Á20 mL), combined the organic phases, dried over Na2SO4, and concentrated in vacuo. The residue was N-heteroarene (1 mmoL, 80 mg), alpha-keto acid (3 mmol), Formic acid (1 mmol, 38 muL), ammonium persulfate (3 mmoL, 685 mg), ferrous sulfate heptahydrate (0.08 mmoL, 22 mg) and 20 mL of mixed solvent (DCM: H2O = 3: 1) , 0.1 mL DMSO was added into a 25 mL round-bottomed flask. The mixture was stirred at 40 oC until TLC analysis indicating that the reaction was complete (witnessed by the disappearance of the N-heteroarene). After separation of organic phase, the residue was neutralized by 0.1 M sodium hydroxide solution, then extracted with DCM (3¡Á20 mL), combined the organic phases, dried over Na2SO4, and concentrated in vacuo. The residue was purified by column chromatography on silica gel using a mixture of petroleum ether/EtOAc (v : v = 20 : 1) as eluent to afford the desired pure product.

13708-12-8, The synthetic route of 13708-12-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Wang, Xiu-Zhi; Zeng, Cheng-Chu; Tetrahedron; vol. 75; 10; (2019); p. 1425 – 1430;,
Quinoxaline – Wikipedia
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