Category: benzofuran

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.69604-00-8,Ethyl 5-nitrobenzofuran-2-carboxylate,as a common compound, the synthetic route is as follows.,69604-00-8

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).

As the paragraph descriping shows that 69604-00-8 is playing an increasingly important role.

Reference£º
Patent; Sumitomo Dainippon Pharma Co., Ltd.; IKUMA Yohei; FUKUDA Nobuhisa; IWATA Masato; KIMURA Hidenori; SUZUKI Kuniko; EP2876105; (2015); A1;,
Benzofuran – Wikipedia
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641-70-3, 3-Nitrophthalic anhydride is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,641-70-3

3-Nitrophthalic anhydride (22.3 g, 115 mmol) was added slowly to a well-stirred flask containing conc. NH3 (28%, 33.5 mL). After complete addition the flask was cooled to 0 C with ensuing precipitation. The precipitate was collected by filtration and suspended in water and acidified to pH 2. 217 C). 1H NMR (300 MHz, DMSO-d6) delta 8.16 (dd, J = 8.1, 1.2 Hz, 1H), 8.10 (dd, J = 7.8, 1.2 Hz, 1H), 8.01 (br s, 1H), 7.69 (dd, J = 7.8, 8.1 Hz, 1H), 7.60 (br s, 1H). 13C NMR (75 MHz, DMSO-d6) delta 166.1, 165.7, 147.2, 134.2, 133.0, 132.0, 129.6, 126.9

As the paragraph descriping shows that 641-70-3 is playing an increasingly important role.

Reference£º
Article; Hansen, Martin; Jacobsen, Stine Engesgaard; Plunkett, Shane; Liebscher, Gudrun Eckhard; McCorvy, John D.; Braeuner-Osborne, Hans; Kristensen, Jesper Langgaard; Bioorganic and Medicinal Chemistry; vol. 23; 14; (2015); p. 3933 – 3937;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

62119-70-4, 2-Benzofuranacetic acid is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,62119-70-4

Exemplary step 1: benzofuran-2-yl-acetic acid methyl ester (“BFAA methyl ester”) synthesis; Benzofuran-2-yl-acetic acid (BFAA, defined as 1 part by weight; Ix mole fraction) was combined with toluene (approximately 4.3 parts by weight) and methanol (approximately 1.96 parts by weight) was added to form a solution. Concentrated (cone.) hydrochloric acid (approximately 0.28 parts by weight; 0.5x mole fraction) was added while controlling the temperature below about 25 C and the reaction mixture was stirred for several hours. The reaction was quenched with excess aqueous sodium bicarbonate solution. The aqueous layer was separated and the organic layer was washed with aqueous sodium chloride solution. The aqueous layer was separated and the organic product layer was concentrated under vacuum, hi this particular example. Heptane was added to the residue and concentrated under vacuum to yield the product BFAA methyl ester.

As the paragraph descriping shows that 62119-70-4 is playing an increasingly important role.

Reference£º
Patent; ARYX THERAPEUTICS; WO2007/11835; (2007); A2;,
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Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.59434-19-4,4-Aminophthalide,as a common compound, the synthetic route is as follows.,59434-19-4

To a stirred mixture of 1-methyl-1H-imidazole-2-carbaldehyde (2.5 g, 23 mmol) and anhydrous sodium sulfate (26.9 g, 190 mmol) in anhydrous dichloromethane (500 mL) was added 4-aminoisobenzofuran-1(3H)-one (2.8 g, 19 mmol) at 0 C. After the addition, the mixture was stirred at room temperature for 6 days. The mixture was filtered and the cake was washed with dichloromethane (50 mL¡Á3). The filtrate was concentrated to give crude product. The crude product was washed with petroleum ether to give (E)-4-((1-methyl-1H-imidazol-2-yl)methyleneamino)benzofuran-1(3H)-one (5 g, yield 98%) as a white solid. LC-MS (ESI) m/z: 242 (M+1)+

As the paragraph descriping shows that 59434-19-4 is playing an increasingly important role.

Reference£º
Patent; LEAD THERAPEUTICS, INC.; US2010/35883; (2010); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

59434-19-4, 4-Aminophthalide is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,59434-19-4

4-Aminoisobenzofuran-1(3H)-one (372.5 mg, 2.5 mmol), 4-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)benzaldehyde (645 mg, 2.5 mmol) and 1 g of MgSO4 were added into 40 mL of dichloromethane and stirred under reflux overnight, then the mixture was evaporated under reduced pressure and the residues was dried in vacuum. 385 mg of (E)-4-(4-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)benzylideneamino)isobenzofuran-1 (3H)-one. A mixture of (E)-4-(4-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)benzylideneamino)isobenzofuran-1(3H)-one (385 mg, 0.92 mmol), benzaldehyde (97.9 mg, 0.97 mmol), sodium methanolate (199 mg, 3.68 mmol) and ethyl propionate (10 mL) was stirred at room temperature overnight. Then the resulting mixture was evaporated under reduced pressure and extracted with ethyl acetate (100 mL¡Á4) and concentrated. The crude product was purified by column chromatography (silica gel, petroleum ether: ethyl acetate 20:1 to 5:1) to give 300 mg of methyl 2-(4-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)phenyl)-4-oxo-3-phenyl-1,2,3,4-tetrahydroquinoline-5-carboxylate. LC-MS (ESI) m/z: 538 (M+1)+.

As the paragraph descriping shows that 59434-19-4 is playing an increasingly important role.

Reference£º
Patent; LEAD THERAPEUTICS, INC.; US2010/35883; (2010); 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.54109-03-4,5-Chloroisobenzofuran-1(3H)-one,as a common compound, the synthetic route is as follows.,54109-03-4

100mL and 150mL o-xylene was added dichloromethane 1000mL four-necked flask, 3g of zinc powder, placed on a magnetic stirrer, to 200r / min speed stirring 10min; At the end of the flask was introduced chlorine gas, aeration rate was washed with 10mL / min, aeration time was 10min, the reaction was allowed to stand after the aeration 1h, with a concentration of 10percent sodium hydroxide solution to colorless, into a distillation apparatus, was heated to 70 , dichloromethane was removed by distillation, to precipitate a white solid; white solid was placed in the above-described three-necked flask equipped with a thermometer, a condenser and a stirrer was charged with 50g and 10g of glacial acetic acid and potassium permanganate 3g solid sodium hydroxide, transferred to the water bath temperature was raised to 70 deg.] C shaking bed oscillating reaction 1h, placed in a rotary evaporator, heated to 80 , rotary evaporated to remove acetic acid to give white crystals; added 200mL ethyl acetate equipped with a stirrer and a thermometer four flask, 50g and 20g of sodium chloride sodium hydrogen sulfite and 800mL of distilled water, start agitator 500r / min stirring speed at the stirring process, the white crystals obtained above was added 5 min the flask, stirring was continued for 10min; after stirring was complete, 300mL layered ethyl acetate, poured into a separatory funnel and the organic layer was separated, was added 20mL of 10percent concentration sodium hydroxide solution to wash pale yellow, ethyl acetate was distilled off; the mixture of ethyl acetate was distilled off after added 20g of iodine chlorobenzene and 3g magnesium, and 50mL tetrahydrofuran, placed in an ultrasonic shaker, the ultrasonic oscillating reaction 10min, ultrasonic frequency of 25KHz, ultrasonic power 100W, ultrasound was added 50mL reaction was continued concentration of 95percent ethanol solution and immediately transferred to an ice bath pot was allowed to stand at 4 6h, until no precipitation, transferred to a Buchner funnel after filtration to give 1- (4-iodophenyl) -5-chloro-isobenzofuran .

As the paragraph descriping shows that 54109-03-4 is playing an increasingly important role.

Reference£º
Patent; Changzhou University; Chen, Xingquan; (6 pag.)CN105801539; (2016); A;,
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Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.253429-31-1,7-Bromo-4-fluorobenzofuran,as a common compound, the synthetic route is as follows.,253429-31-1

Step C- Synthesis of Compound 16D; A solution of compound 16C (124.12 g, 577.25 mmol) in ether (2.0 L) was cooled to – 78 0C and treated dropwise with a solution of 2.5 M of n-butyllithium in hexane (235.5 mL) and allowed to stir at -78 C for 15 minutes. To this reaction mixture was added DMF (89.393 mL, 1.15 mol) and allowed to stir at -78 C for 30 minutes. The reaction mixture was quenched with methanol (23.383 mL, 577.25 mmol) and warmed to room temperature. The reaction mixture was diluted with ether (300 mL) and the organic layer was washed with water (300 mL). The separated organic layer was dried (MgSO4) filtered, concentrated in vacuo to provide compound 16D (89.00 g, 93.9%).

The synthetic route of 253429-31-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; SCHERING CORPORATION; WO2009/32123; (2009); A2;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

24673-56-1, 3-Methylbenzofuran-2-carboxylic acid is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,24673-56-1

Step 1: 3-Phenethyl-benzofuran-2-carboxylic acid. 3-Methyl-benzofuran-2-carboxylic acid (9.99 g, 56.7 mmol) in 150 mL of anhydrous THF was added under nitrogen dropwise to a solution of lithium diisopropylamide (60 mL of a 2.0 M solution in heptane/THF/ethylbenzene; 120 mmol) in 350 mL of anhydrous THF at -10 C. After the addition was complete the reaction was stirred at -10 C. for approximately 10 minutes. Benzyl bromide (13.5 mL, 113 mmol) was then added dropwise to the reaction. After the addition the reaction was allowed to warm to room temperature and then stirred at room temperature for 2 h. The reaction was acidified by the addition of 1 N HCl and then concentrated under reduced pressure to remove the THF. The residue was partitioned between 1 N HCl and methylene chloride. The aqueous layer was separated and extracted two times with methylene chloride. The combined extracts were dried (MgSO4) and the solvent removed under reduced pressure. The residue was recrystallized from ethyl acetate to give 3-phenethyl-benzofuran-2-carboxylic acid (1.62 g, 11 %) as a white solid, mp 169-172 C. Elemental Analysis for C17H14O3 Calc’d: C, 76.68; H, 5.30; N, 0.00 Found: C, 76.18; H, 5.27; N, 0.02

The synthetic route of 24673-56-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Wyeth; US2003/45560; (2003); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

18761-31-4, 5-Nitrobenzofuran is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,18761-31-4

(a) 2,3-Dihydrobenzo[b]furan-5-ylamine. To a 150 mL round-bottomed flask was added 5-nitrobenzofuran, Example 38(d), (250 mg, 1.5 mmol), EtOAc (16 mL) and 10% Pd on carbon (33 mg, Aldrich). The suspension was stirred at 25 C. under 1 atm H2 for 24 h, then purged with N2, filtered through Celite and concentrated in vacuo to provide the aniline as a red-brown solid. MS (ESI, pos. ion) m/z: 136 (M+1).

The synthetic route of 18761-31-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Bo, Yunxin Y.; Chakrabarti, Partha P.; Chen, Ning; Doherty, Elizabeth M.; Fotsch, Christopher H.; Han, Nianhe; Kelly, Michael G.; Liu, Qingyian; Norman, Mark Henry; Ognyanov, Vassil I.; Wang, Xianghong; Zhu, Jiawang; US2003/195201; (2003); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

166599-84-4, Benzofuran-4-carboxylic acid is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,166599-84-4

To benzofuran-4-carboxylic acid (50 mg, 0.308 mmol, commercially available from, for example, J&W PharmLab) in THF (1 mL), borane tetrahydrofuran complex (0.47 mL, 1M in THF, 0.470 mmol) was added and the reaction stirred at rt for 1 h. The reaction was quenched with NaHCO3 (20 mL)and extracted with EtOAc (3 x 10 mL). The organic layers were dried over a hydrophobic frit and concentrated to give 50 mg of a colourless oil. This was purified bychromatography on 5i02 (Biotage SNAP 10 g cartridge, eluting with O-5O% EtOAc/cyclohexane), theappropriate fractions were concentrated to give benzofuran-4-ylmethanol (37 mg, 0.225 mmol, 72.9 % yield) as a white solid.LCMS (2 mm Formic): Rt = 0.72 mi [M-OH] = 131.1.

The synthetic route of 166599-84-4 has been constantly updated, and we look forward to future research findings.

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;,
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