Day: November 9, 2020

1865-11-8, Methyl quinoxaline-2-carboxylate is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A solution of freshly prepared saturated aqueous ammonia (20mL) and 2-quinoxalinecarboxylate (115mg, 0.612 mmol) was stirred at room temperature for 18 hours. The solution was then evaporated under reduced pressure to yield the product as an off-white solid in quantitative yield. Elemental analysis calcd (%) for C9H7N3O (173.06): Calc. C 62.40 H 4.07 N 24.26; found: C 62.40 H 4.11 N 23.94. 1H NMR (400 MHz, d6-DMSO): delta (ppm) 9.439 (s, 1H, H5), 8.237 (dd, J1-2 = 8 Hz, J1-3 = 2 Hz, 1H, H1), 8.194 (dd, J4-3 = 8 Hz, J4-2 = 0.8 Hz, 1H, H4), 7.997 (q-br, J2/3-3/2/1/4 = 10 Hz, 2H, H2/3).

1865-11-8, The synthetic route of 1865-11-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Cowan, Matthew G.; Miller, Reece G.; Brooker, Sally; Supramolecular Chemistry; vol. 27; 11-12; (2015); p. 780 – 786;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.148231-12-3,5,8-Dibromoquinoxaline,as a common compound, the synthetic route is as follows.

General procedure: A mixture of 5,8-dibromoquinoxaline (3) (287 mg, 1.0 mmol), Pd(PPh3)2Cl2 (70 mg, 0.1 mmol), CuI (9.5 mg, 0.05 mmol) and PPh3 (26 mg, 0.1 mmol) in triethylamine/tetrahydrofuran 1:1 (20 mL) was stirred and heating until 70 148231-12-3, The synthetic route of 148231-12-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Aguiar, Leonardo de O.; Junior, Adalberto S.L.; Bechtold, Ivan H.; Curcio, Sergio Fernando; Cazati, Thiago; Alves, Tiago V.; Vieira, Andre Alexandre; Journal of Molecular Liquids; vol. 296; (2019);,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.32601-86-8,2-Chloro-3-methylquinoxaline,as a common compound, the synthetic route is as follows.

EXAMPLE 5 N,N’-Dibutylcarbamimidothioic acid(3-methyl-2-quinoxalinyl)ester, hydrochloride 2-Chloro-3-methylquinoxaline (3.572 g., 0.02 mole) was dissolved in 50 ml. of methanol, treated with Norit and filtered. The filtrate was added to 3.767 g. (0.02 mole) of 1,3-dibutylthiourea dissolved in 25 ml. of methanol. The resulting solution was stirred at room temperature for 1 hour and evaporated on a rotary evaporator. The residual oil was triturated successively with several portions of ether, 2:1 pentane-ether and acetone, and was filtered and washed with pentane, to give 2.60 g. (38.6%) of product as a tan solid, m.p. 97-99. Analysis for: C18 H27 ClN4 S Calculated: C, 58.92; H, 7.41; N, 15.27; Cl, 9.66; S, 8.74. Found: C, 58.93; H, 7.50; N, 15.31; Cl, 9.71; S, 9.01.

32601-86-8, 32601-86-8 2-Chloro-3-methylquinoxaline 236276, aquinoxaline compound, is more and more widely used in various fields.

Reference£º
Patent; American Home Products Corporation; US4349674; (1982); A;,
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879-65-2,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.879-65-2,2-Quinoxalinecarboxylic acid,as a common compound, the synthetic route is as follows.

5-(4-Aminophenyl)-1H-naphtho[1,2-b][1,4]diazepine-2,4(3H,5H)-dione (32 mg, 0.101 mmol) obtained in Example 1, (3), quinoxaline-2-carboxylic acid (35 mg, 0.202 mmol), and O-(benzotriazol-1-yl)-N,N,N’,N’-tetramethyluronium hexafluorophosphate (42 mg, 0.111 mmol) were dissolved in DMF (2.0 mL), then the solution was added with triethylamine (20 mg, 0.202 mmol), and the mixture was stirred over night. The reaction mixture was treated in a conventional manner to obtain the title compound (10 mg, yield 21%) as yellow crystals. 1H NMR (CDCl3, 400MHz) delta: 3.63 (2H, s), 7.07 (1H, d, J=9Hz), 7.33 (2H, d, J=9Hz), 7.62 (2H, d, J=8Hz), 7.71 (1H, t, J=8Hz), 7.8-8.0 (5H, m), 8.09 (1H, d, J=8Hz), 8.1-8.3 (2H, m), 8.50 (1H, s), 9.75 (1H, s), 9.91 (1H, s)

As the paragraph descriping shows that 879-65-2 is playing an increasingly important role.

Reference£º
Patent; Nippon Chemiphar Co., Ltd.; USHIODA, Masatoshi; KOBAYASHI, Kunio; SAITO, Daisuke; SAKUMA, Shogo; IMAI, Toshiyasu; INOUE, Kazuhide; EP2803662; (2014); A1;,
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1204-75-7, 3-Oxo-3,4-dihydroquinoxaline-2-carboxylic acid is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A 10 ml solution of 3-hydroxy-2-quinoxalinecarboxylic acid in methanol at a concentration of 0. lmol ¡¤ I / 1 was added dropwise to a solution of 5 ml of Co (Cl0) at a concentration of 0.05 mol / 4) 2.6H20 aqueous solution, shake to get a red clear solution, standing at room temperature8 days for self-assembly reaction, to obtain red lumpy crystals, and then followed by anhydrous ethanol, ether washing, drying, that is,A cobalt complex of the formula [Co (qc) 2 (H20) 2] ¡¤ 2H20, wherein qc represents a 3-hydroxy-2-quinoxaline carboxylate represented by the formula(I), yield 54%. The cobalt complex prepared in this example was a mononuclear complex with X-single crystal diffractometer analysis. elementAnalysis: According to the theoretical structure of C18H18CoN4iiq, the calculated value

1204-75-7, 1204-75-7 3-Oxo-3,4-dihydroquinoxaline-2-carboxylic acid 71001, aquinoxaline compound, is more and more widely used in various fields.

Reference£º
Patent; Nanjing university of information science and technology; Xiao, bo; Chen, MinDong; Liu, qi; (9 pag.)CN103709204; (2016); B;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.6298-37-9,Quinoxalin-6-amine,as a common compound, the synthetic route is as follows.

6298-37-9, General procedure: To a solution of S7 (502.3 mg, 1.4 mmol) in THF (10 mL) containing 10 muL DMF was added oxalylchloride (360.0 muL, 0.3 mmol) at room temperature. The solution was stirred for 2 h andconcentrated. The resulting acid chloride S8 (37.0 mg, 0.1 mmol) was reacted with thecorresponding amine (0.2 mmol) and N,N-Diisopropylethylamine (52.3 muL, 0.3 mmol) overnight.The solution was extracted with ethyl acetate (3 mL), washed with citric acid solution, saturatedNaHCO3, and concentrated. The residue was then purified by preparative TLC.

6298-37-9 Quinoxalin-6-amine 0, aquinoxaline compound, is more and more widely used in various fields.

Reference£º
Article; Lee, Hsin-Yu; Suciu, Radu M.; Horning, Benjamin D.; Vinogradova, Ekaterina V.; Ulanovskaya, Olesya A.; Cravatt, Benjamin F.; Bioorganic and Medicinal Chemistry Letters; vol. 28; 16; (2018); p. 2682 – 2687;,
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91-19-0, Quinoxaline is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: A solution of quinoxaline (1) (390mg, 3.0mmol), NBS (390mg, 3.0mmol), and benzoyl peroxide (catalytic amount) in glacial acetic acid (10mL) was heated at reflux temperature for 20h. The reaction was monitored by TLC or 1H NMR spectroscopy. The resulting reaction mixture was allowed to cool to room temperature and the solvent was removed under reduced pressure. The mixture was diluted with a saturated solution of sodium carbonate (10mL) and the mixture was extracted with ethyl acetate (2¡Á25mL). Combined organic layers were washed with water, dried over Na2SO4 and concentrated. 6-Bromoquinoxaline (10) (315mg, 50%) was obtained as a sole product. The reaction was repeated using DMF as a solvent at the same reaction condition and monobromide 10 was obtained in 51% yield., 91-19-0

As the paragraph descriping shows that 91-19-0 is playing an increasingly important role.

Reference£º
Article; Ucar, Sefa; E?siz, Selcuk; Da?tan, Arif; Tetrahedron; vol. 73; 12; (2017); p. 1618 – 1632;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.55687-02-0,6-Bromo-2-chloroquinoxaline,as a common compound, the synthetic route is as follows.

55687-02-0, To a stirred suspension of (2-[(2S)-1-(tert-butoxycarbonyl)pyrrolidin-2-yl]-1-{[2 (trimethylsilyl) ethoxy]methyl}- 1 H-imidazol-5-yl)boronic acid (150 mg, 0.26 mmol), obtained from Preparation 13b, in 1 ,2-dimethoxyethane (1 mL), was added 6-bromo-2-chloroquinoxaline (62 mg, 0.26 mmol), obtained from Preparation 30,Pd(dppf)CI2.DCM (13 mg, 0.05mmol) and 2M Na2CO3 (aq) (0.38 mL, 0.77 mmol). The mixture was degassed, then put under nitrogen three times and then stirred at 300C for 3 hours. The resulting dark brown mixture was partitioned between ethyl acetate (5 mL) and water (5 mL). The organic phases were extracted and the aqueous phase was washed with more EtOAc (5 mL). The organic phases were combined, dried (Na2SO4), filtered and concentrated in vacuo. The resulting crude material was purified by column chromatography (dry loaded redisep (4 g), 20 to 80 % ethyl acetate, heptane) to give 98 mg of the title compound as a orange foam.1H-NMR (400 MHz, MeOD): delta= 9.28 (1 H, d), 8.22 (1 H, d), 7.95 (3H, m), 6.70 (1 H, m), 5.95 (1 H, dd), 5.16(1 H, m), 3.75-3.52 (4H, m), 2.42 (1 H, m), 2.24-1.91 (3H, m), 1.46-1.21 (9H, m), 0.86 (2H, m), -0.17 (9H, d).LCMS (run time = 6 min): Rt = 4.38 min; m/z 574; 576 [M+H]+

As the paragraph descriping shows that 55687-02-0 is playing an increasingly important role.

Reference£º
Patent; PFIZER LIMITED; MILBANK, Jared Bruce John; PRYDE, David Cameron; TRAN, Thien Duc; WO2011/4276; (2011); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1204-75-7,3-Oxo-3,4-dihydroquinoxaline-2-carboxylic acid,as a common compound, the synthetic route is as follows.

Example 29 N-[3,5-Bis(trifluoromethyl)phenyl]-3-hydroxyquinoxaline-2-carboxamide (Comopund No. 29). Using 3-hydroxyquinoxaline-2-carboxylic acid and 3,5-bis(trifluoromethyl)aniline as the raw materials, the same operation as the example 16 gave the title compound. Yield: 2.7%. 1H-NMR(DMSO-d6): delta 7.40-7.45(2H, m), 7.69(1H, td, J=8.4, 1.5Hz), 7.90-7.93(2H, m), 8.41(2H, s), 11.64(1H, s), 13.02(1H, s).

1204-75-7, The synthetic route of 1204-75-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Institute of Medicinal Molecular Design, Inc.; EP1352650; (2003); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.80636-30-2,3,3-Dimethyl-3,4-dihydroquinoxalin-2(1H)-one,as a common compound, the synthetic route is as follows.

80636-30-2, EXAMPLE 94 Ethyl 4,5-Dihydro-4,4-dimethylimidazo[1,5-a]quinoxaline-3-carboxylate (XXXIII) Potassium tert-butoxide (1M, 4.54 ml) is added to 1,2,3,4-tetrahydro-3,3-dimethylquinoxalin-2-one (IV, EXAMPLE 2, 0.762 g) in THF (4 ml) at ice/saline temperature. The reaction is stirred for 40 min, at which time diethyl chlorophosphate (0.656 ml) is added. After stirring at ice-saline temperature for 2 hr, ethyl isocyanoacetate (0.562 g) is added, followed by potassium t-butoxide (1 M, 4.97 ml). The reaction is stirred for 3.5 hr, allowing it to slowly warm to 20-25. The reaction is then quenched with several drops of acetic acid and then partitioned between ethyl acetate, aqueous sodium bicarbonate and saline. The phases are separated and the organic phase is dried over magnesium sulfate, concentrated, and the resulting crude product chromatographed on silica gel (200 ml) eluding with methanol/dichloromethane (2/98). The appropriate fractions are pooled and concentrated to give the title compound, mp 145-149; NMR (CDCl3) 1.44, 1.74, 3.79, 4.40, 6.77, 6.82, 7.10, and 7.39 delta.

The synthetic route of 80636-30-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; The Upjohn Company; US5541324; (1996); A;,
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