Category: benzofuran

496-16-2, 2,3-Dihydrobenzo[b]furan is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

REFERENCE EXAMPLE 1 Synthesis of 2,3-Dihydrobenzofuran-5-carbaldehyde 2,3-Dihydrobenzofuran (100.0 g, 832.3 mmol) and N,N-dimethylformamide (133.8 g, 1830.6 mmol) were mixed and heated, and phosphorus oxychloride (255.2 g, 1643.0 mmol) was added dropwise thereto at an inner temperature of 70 to 80 C. over 2 hours. The mixture was heated to an inner temperature of 80 to 90 C., stirred for 7.5 hours, cooled and then added dropwise to 1000 g of water, followed by stirring at room temperature for 5 hours. After extracting with toluene and washing in turn with water, saturated sodium bicarbonate water and water, the organic layer was concentrated under reduced pressure to obtain a toluene solution of the title compound (yield: 340 g, apparent yield: 100%), 496-16-2

The synthetic route of 496-16-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Ishida, Hajime; Fukuta, Makoto; US2004/18239; (2004); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

87-41-2, Isobenzofuran-1(3H)-one is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

0.67 g (5 mmol, 1 equiv.) Of compound I are added at room temperature (2-Benzofuranone, Homemade, Journal of the American Chemical Society, 136 (49), 17180-17192; 2014) Add 15 mL of chloroform and 10mL acetic acid composition of the mixed solution, Stirring, Add under nitrogen protection N-bromobutanimide 1.067 g (6 mmol, 1.2 equiv.). Slow heating caused by reflux, After stirring for 5h, Dianban confirm the end of the reaction, The reaction liquid in the refrigerator for half an hour, Filter to remove the solid, Vacuum distillation, Washed, extraction, The organic phase was dried to give 1.06 g of crude product, which is, The mixture of compound IIa and compound IIb is to be directly cast into one reaction., 87-41-2

As the paragraph descriping shows that 87-41-2 is playing an increasingly important role.

Reference£º
Patent; Suzhou Haofan Biological Technology Co., Ltd.; Lv Minjie; Zhang Haiyan; Wang Guichun; Sun Fangchao; (9 pag.)CN105153013; (2017); B;,
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Benzofuran | C8H6O – PubChem

496-16-2, 2,3-Dihydrobenzo[b]furan is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Part A Preparation of 5-(2,3-dihydrobenzofuranyl) sulfonyl chloride To a solution of 3.35 g of anhydrous N,N-dimethylformamide at 0 C. under nitrogen was added 6.18 g of sulfuryl chloride, whereupon a solid formed. After stirring for 15 minutes, 4.69 g of 2,3-dihydrobenzofuran was added, and the mixture heated at 100 C. for 2 hours. The reaction was cooled, poured into ice water, extracted with methylene chloride, dried over magnesium sulfate, filtered and concentrated the crude material. This was recrystallized from ethyl acetate to afford 2.45 g of 5-(2,3-dihydrobenzofuranyl)sulfonyl chloride., 496-16-2

496-16-2 2,3-Dihydrobenzo[b]furan 10329, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; G. D. Searle & Co.; US5968942; (1999); A;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.496-16-2,2,3-Dihydrobenzo[b]furan,as a common compound, the synthetic route is as follows.

Part A Preparation of 5-(2,3-dihydrobenzofuranyl) sulfonyl chloride To a solution of 3.35 g of anhydrous N,N-dimethylformamide at 0 C. under nitrogen was added 6.18 g of sulfuryl chloride, whereupon a solid formed. After stirring for 15 minutes, 4.69 g of 2,3-dihydrobenzofuran was added, and the mixture heated at 100 C. for 2 hours. The reaction was cooled, poured into ice water, extracted with methylene chloride, dried over magnesium sulfate, filtered and concentrated the crude material. This was recrystallized from ethyl acetate to afford 2.45 g of 5-(2,3-dihydrobenzofuranyl)sulfonyl chloride.

496-16-2, As the paragraph descriping shows that 496-16-2 is playing an increasingly important role.

Reference£º
Patent; G. D. Searle & Co.; US5753660; (1998); A;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

496-16-2, 2,3-Dihydrobenzo[b]furan is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(1) 7-Formyl-2,3-dihydrobenzofuran 108 ml of an n-butyllithium solution (2.1M) in hexane and 26.7 g (230 mmol) of tetramethylethylenediamine (TMEDA) are introduced into a 1 liter round-bottomed flask. The mixture is stirred at room temperature for 15 minutes and 23 g (190 mmol) of 2,3-dihydrobenzofuran are added. The mixture is stirred for 4 hours at 35 C., cooled to -78 C. and 13.9 g (190 mmol) of dimethylformamide are added. The temperature is allowed to return to 20 C., 500 ml of water are added and extraction is carried out with ethyl acetate (3*200 ml). The organic phases are combined, dried and concentrated under vacuum. The residue is purified by silica flash chromatography (elution: 5% ethyl acetate in petroleum ether). 9.85 g (Yield: 35%) of 7-formyl-2,3-dihydrobenzofuran are obtained–M.p.: 55 C.

496-16-2, As the paragraph descriping shows that 496-16-2 is playing an increasingly important role.

Reference£º
Patent; Synthelabo; US6063810; (2000); A;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

603311-31-5, 7-Bromobenzofuran-5-ol is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Preparation 88; (5-hydroxybenzofur-7-yl) acetonitrile; 7-bromo-5- (tetrahydropyran-2-yloxy) benzofuran; Combine 7-bromo-5-hydroxybenzofuran (5.0 g, 0.0235 mol) with pyridinium para-toluenesulfonate (0.59 g, 0.1 equivalent) and dissolve in 60 mL dichloromethane under nitrogen. Add via syringe 3,4-dihydro-2H-pyran (3.2 mL, 1.5 equivalents) and stir at 20¡ã C overnight. Dilute with dichloromethane then extract with IN sodium hydroxide and wash with brine. Dry over sodium sulfate, filtered, and then concentrate to afford the title compound as a brown oil. ‘H NMR (400 MHz, CDC13) : 8 1. 70 (m, 6H), 3.57 (m, 1H), 3.86 (m, 1H), 5. 31 (t, J = 3. 17 Hz, 1H), 6.69 (d, J = 2.20 Hz, 1H), 7.19 (m, 2H), 7.58 (d, J = 2.20 Hz, 1H)., 603311-31-5

As the paragraph descriping shows that 603311-31-5 is playing an increasingly important role.

Reference£º
Patent; ELI LILLY AND COMPANY; WO2003/76442; (2003); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

10242-12-3, 5-Nitrobenzofuran-2-carboxylic acid is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Ethyl 5-nitro-1-benzofuran-2-carboxylate (2.0 g, 8.54 mmol) was suspended in a mixed solvent of methanol (3.2 mL) and THF (3.2 mL), then a 4 mol/L aqueous solution of sodium hydroxide (3.2 mL) was added thereto, and the mixture was stirred at 70C for 1 hour. A 1 mol/L aqueous solution of hydrochloric acid was added to the reaction solution, followed by extraction with ethyl acetate twice. The organic layer was washed with a saturated saline solution, dried over anhydrous sodium sulfate and filtered, and then the solvent was concentrated under reduced pressure to obtain a crude product. The obtained crude product was dissolved in DMF (20 mL), then 1,1-di-tert-butoxy-N,N-dimethylmethaneamide (13.9 g, 68.32 mmol) was added, and the mixture was stirred at 80C for 11 hours. Water was added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was washed with a saturated saline solution, dried over anhydrous sodium sulfate and filtered, and then the organic layer was concentrated under reduced pressure to obtain a crude product. Chloroform (10 mL) was added to the obtained crude product, and the crystal was filtered out to obtain the title compound (1.76 g, 78%). 1H NMR (CDCl3, 300 MHz) delta 12.43 (s, 1H), 8.13-8.11 (m, 1H), 7.61-7.59 (m, 1H), 7.34 (s, 1H), 2.11-1.98 (m, 4H), 1.64-1.59 (m, 9H).

10242-12-3, The synthetic route of 10242-12-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Sumitomo Dainippon Pharma Co., Ltd.; IKUMA Yohei; FUKUDA Nobuhisa; IWATA Masato; KIMURA Hidenori; SUZUKI Kuniko; EP2876105; (2015); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.652-39-1,4-Fluoroisobenzofuran-1,3-dione,as a common compound, the synthetic route is as follows.

652-39-1, A mixture of 3-fluorophthalic anhydride (1 equiv.), 7-amino-2-oxa-6-thia-5- azaspiro[3.5]nonane 6,6-dioxide (1 equiv.), and potassium acetate (2.5 equiv.) in acetic acid isstirred at 120 ¡ãC overnight. The dark mixture is cooled and filtered. The filter cake is dissolved in DCM and washed with saturated NaHCO3 and brine. The organic layer is dried (Na2SO4) and concentrated to provide 4-fluoro-6? -oxetano-2? -sulfonyl-thalidomide.

As the paragraph descriping shows that 652-39-1 is playing an increasingly important role.

Reference£º
Patent; C4 THERAPEUTICS, INC.; PHILLIPS, Andrew, J.; NASVESCHUK, Chris, G.; HENDERSON, James, A.; LIANG, Yanke; FITZGERALD, Mark, E.; HE, Minsheng; MICHAEL, Ryan, E.; (768 pag.)WO2017/197055; (2017); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

4265-25-2, 2-Methylbenzofuran is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: 2-substituted benzofurans (0.5 mmol), aryl sulfonyl chloride (0.6 mmol), PPh3 (262 mg, 1.0 mmol), KI (17 mg, 0.1 mmol) or KI (42 mg, 0.25 mmol) and EtOH (1.0 mL) were mixed in a sealed tube. The mixture was stirred at 90 C or 100 C for 12 hours or 24 hours. Then, the solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography to afford the pure product.

4265-25-2, 4265-25-2 2-Methylbenzofuran 20263, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Article; Zhao, Xia; Lu, Xiaoyu; Wei, Aoqi; Jia, Xiaoliang; Chen, Jun; Lu, Kui; Tetrahedron Letters; vol. 57; 48; (2016); p. 5330 – 5333;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.35700-40-4,2,3-Dihydrobenzofuran-7-carboxylic acid,as a common compound, the synthetic route is as follows.

[00323] 2,3-Dihydrobenzofuran-7-carboxylic acid (820 mg, 5 mmol) was dissolved inTHF (10 mL). To the solution was added TEA (0.7 mL, 5 mmol) and methylchloroformate (0.43 mL, 5 mmol). The solution was stirred for 0.5 hour. The white precipitates were removed by filtration, the filtrate was added to a solution OfNaBH4 (437 mg, 12.5 mmol) in H2O (5 mL). The resulting solution was stirred overnight. The reaction mixture was neutralized with 2 M aqueous HCl solution and then extracted with EtOAc. The organic layer was washed with brine, dried over anhydrous Na2SO4 and concentrated in vacuo. The crude alcohol was dissolved in DCM. To the solution was added PCC (1.83 g, 7.5 mmol). The mixture was stirred for 2 hours at room temperature and diluted with diethyl ether, then ether layers were decanted. Combined organic layer was filtered though a layer of Celite. The filtrate was concentrated to give crude product. The crude was purified from column EPO with 10% EtOAc/hexane to afford 450 mg of 2,3-dihydrobenzofuran-7-carbaldehyde as a slightly yellow solid. HPLC 4.3 min., 35700-40-4

The synthetic route of 35700-40-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; VERTEX PHARMACEUTICALS INCORPORATED; WO2007/25307; (2007); A2;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem