Heterocyclic Building Block-benzofuran

4265-16-1, Benzo[b]furan-2-carboxaldehyde is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: Ku-76 in the above reaction formula was synthesized as follows (a in the reaction formula).A THF solution (15 mL) of ethyl 2- (bis (2-isopropylphenoxy) phosphoryl) acetate (4.3 g, 10.7 mmol) was cooled to -78 degrees under an argon atmosphere, and Triton B (5.5 mL, 14.0 mmol) was added. .After stirring for 20 minutes, a THF solution (10 mL) of cinnamic aldehyde (1.32 g, 10.0 mmol) was added.After 1 hour, saturated aqueous ammonium chloride solution was added to the reaction, and the mixture was extracted with ethyl acetate (50 mL ¡Á 3). The organic layer was washed with saturated brine, dried over magnesium sulfate, and the reduced pressure solvent was distilled off.The crude product was produced by silica gel column chromatography (ethyl acetate in hexane, 3% to 5%) to give 1.57 g (78%, Z: E = 85: 15) of ester ku-76 as a pale yellow oil ., 4265-16-1

As the paragraph descriping shows that 4265-16-1 is playing an increasingly important role.

Reference£º
Patent; Tokyo University of Agriculture and Technology; Fujii, Yoshiharu; Wasano, Naoya; Tamura, Naoyuki; Shindo, Mitsuru; Matsumoto, Kenji; (51 pag.)JP2019/189648; (2019); A;,
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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;,
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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
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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

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

13196-11-7, Benzofuran-6-ol is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a suspension of Example 5b (0.26 g, 1.9 mmol, 1 eq.), triethylamine (0.65 g, 6.5 mmol, 3.4 eq.), and magnesium dichloride (0.29 g, 3.1 mmol, 1.6 eq.) in acetonitrile (25 mL) was added paraformaldehyde (0.36 g, 13 mmol, 6.8 eq.) portionwise. The resulting mixture was refluxed for 3.5 hours at which time TLC revealed that all the starting material was consumed. The reaction mixture was acidified with 6 N HCl, concentrated and extracted with ether (3* 15 mL). The ether extracts were washed with water, brine, dried over Na2S04 and concentrated under reduced pressure to give the desired product (Example 5c, 0.22 g, crude yield 65%) as yellow oil., 13196-11-7

13196-11-7 Benzofuran-6-ol 128844, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; FRONTHERA U.S. PHARMACEUTICALS LLC; JIN, Bohan; DONG, Qing; HUNG, Gene; (212 pag.)WO2017/218960; (2017); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

58546-89-7, Benzofuran-5-amine is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

58546-89-7, Reference Example 1-14-(Benzofuran-5-ylamino)-7H-pyrrolo[2,3-d]pyrimidine-5-carboxylic acid ethyl ester hydrochloride To a solution of 4-chloro-7H-pyrrolo[2,3-d]pyrimidine-5-carboxylic acid ethyl ester (0.383 g, 1.70 mmol) in isopropanol (15 ml) was added 5-aminobenzo[b]furan (0.250 g, 1.88 mmol), and the mixture was heated for 1 hour under reflux.After the completion of the reaction, the reaction mixture was cooled to 0 C., and then the precipitated solid was collected by filtration, washed with diethyl ether, and dried under reduced pressure to give the compound of the Reference Example 1-1 (0.528 g, 1.47 mmol, yield 87%).Mass (EI, m/z): 322 [M]+.1H-NMR (DMSO-d6) delta: 12.95 (1H, br s), 11.06 (1H, s), 8.39 (1H, s), 8.24 (1H, d, J=1.7 Hz), 8.15 (1H, s), 8.02 (1H, d, J=2.0 Hz), 7.65 (1H, d, J=8.8 Hz), 7.56 (1H, dd, J=8.8, 2.0 Hz), 7.02 (1H, d, J=1.7 Hz), 4.40 (2H, q, J=7.1 Hz), 1.37 (3H, t, J=7.1 Hz).

58546-89-7 Benzofuran-5-amine 1477152, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; UBE INDUSTRIES, LTD.; US2012/149902; (2012); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

15832-09-4, 6-Methoxy-3(2H)-benzofuranone is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a solution of compound 3a or 3b (2.0 mmol) in methanol (20 mL) was added successively anaqueous 50% potassium hydroxide (3 mL) and benzaldehyde derivatives 4 (3.0 mmol). The mixture was heated at 60 C and then solvent was evaporated. The residue was diluted in water and extracted with ethyl acetate. The organic layer was dried over anhydrous MgSO4 and filtered. The filtrate was concentrated and purified by silica gel column chromatography to give aurones., 15832-09-4

As the paragraph descriping shows that 15832-09-4 is playing an increasingly important role.

Reference£º
Article; Shin, Seo Young; Shin, Min Cheol; Shin, Ji-Sun; Lee, Kyung-Tae; Lee, Yong Sup; Bioorganic and Medicinal Chemistry Letters; vol. 21; 15; (2011); p. 4520 – 4523;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.57319-65-0,6-Aminoisobenzofuran-1(3H)-one,as a common compound, the synthetic route is as follows.

57319-65-0, 6-Amino-1(3H)-isobenzofuranone (3.0 g, 20 mmol) obtained from Example 26-(1) was dissolved in a mixture of 47% aqueous hydrobromic acid solution (15 ml) and water (15 ml), then the mixture was cooled to 0C, and a solution of sodium nitrite (1.45 g, 21 mmol) in water (7 ml) was slowly added thereto. Further, a solution of copper (I) bromide (3.6 g, 25 mmol) dissolved in 47% aqueous hydrobromic acid solution (10 ml) was added to the reaction mixture, and the resulting mixture was stirred at 80C for 20 minutes. After cooling the mixture, the liberated product was collected by filtration and then washed with water. The obtained pale brown solid was dissolved in ethyl acetate, then the insoluble material was removed by filtration, and the filtrate was washed successively with a 1N aqueous solution of hydrochloric acid, an aqueous solution of sodium hydrogen carbonate, and an aqueous solution of sodium chloride, and then dried over anhydrous magnesium sulfate. After filtration, the filtrate was concentrated to afford the title compound (3.57 g, 84% yield) as a crystalline solid. NMR spectrum (400 MHz, CDCl3) delta ppm: 5.289 (2H, s), 7.391 (1H, d, J=8 Hz), 7.808 (1H, dd, J=8, 2 Hz), 8.068 (1H, d, J=2 Hz) IR spectrum nu max KBr cm-1: 1778, 1458, 1359, 1191, 1046, 998, 768 Mass spectrum m/z (EI): 214, 212 (M+), 185, 183, 157, 155.

As the paragraph descriping shows that 57319-65-0 is playing an increasingly important role.

Reference£º
Patent; Sankyo Company, Limited; EP1362856; (2003); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

42933-43-7, 2,3-Dihydrobenzofuran-5-amine is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 5; Preparation of N-(4-tert-butylphenyl)-2,3-dihydro-1-benzofuran-5-amine; [Show Image] To a flask equipped with a magnetic stirrer, reflux condensor, and nitrogen inlet was added 2,3-dihydro-1-benzofuran-5-amine (11.6 grams, 85.8 mmoles, prepared as in Example 23 of U.S. Pat. No. 20040029932), 4-tert-butyl bromobenzene (18.1 grams, 85 mmoles), tris(dibenzylideneacetone)dipalladium (0) (1.6 grams, 1.7 mmoles), rac-2,2′-bis(diphenylphosphino)-1,1′-binapthyl (2.1 grams, 3.4 mmoles), sodium tert-butoxide (16.4 grams, 0.17 moles) and anhydrous toluene (100 mL). The contents of the flask were refluxed for three days; cooled to room temperature; and filtered through a pad of silica gel. The silica gel pad was then eluted with dichloromethane (150 mL). The combined organic layers were concentrated in vacuo to yield a dark solid. The solid was chromatographed on silica gel, eluting with hexane/ethyl acetate (20:1) to afford 10 grams of the desired product as a white solid. 1H NMR (CDCl3) delta 7.25 (d, 2H), 6.95 (s, 1H), 6.85 (d, 3H), 6.7 (d, 1H), 5.4 (bs, 1H), 4.5 (t, 2H), 3.15 (t, 2H), 1.3 (s, 9H)., 42933-43-7

As the paragraph descriping shows that 42933-43-7 is playing an increasingly important role.

Reference£º
Patent; Chevron Oronite Company LLC; EP1801104; (2007); A2;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem