Category: benzofuran

81742-10-1, 3,6-Dichlorotrimellitic Anhydride is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Dibenzofuran-1,3-diol (prepared according to Carvalho, C. F. et al. (Supra)) (200 mg, 1 mmol), 2-fluoronaphthalene-1,3-diol 34 (178 mg, 1 mmol, AB part number 361828) and anhydrous 2,5-dichlorotrimellitic acid (260 mg, 1 mmol, AB part number 361892) were mixed in methanesulfonic acid (10 mL). Then, the mixture was stirred at 130 to 135 C. for 2 hours. The reaction mixture was cooled and mixed with ice water (100 mL). The precipitated dye was extracted with ethyl acetate (100 mL). The organic layer was washed with water (50 mL ¡Á 2) and washed with brine (50 mL ¡Á 1). After drying over sodium sulfate, the mixture was filtered, the solvent was removed, and the crude pigment was obtained as an isomeric mixture. These isomers were separated by thin layer chromatographic separation and 80 mg (13%) of a dye was obtained., 81742-10-1

As the paragraph descriping shows that 81742-10-1 is playing an increasingly important role.

Reference£º
Patent; APPLIED BIOSYSTEMS Ltd. LIABILITY COMPANY; BENSON, SCOTT CONRAD; MENCHEN, STEVEN MICHAEL; THEISEN, PETER DAVID; UPADHYA, KRISHNA GAJANAN; HAUSER, JOAN DALE; (37 pag.)JP2015/57478; (2015); 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.4265-16-1,Benzo[b]furan-2-carboxaldehyde,as a common compound, the synthetic route is as follows.

In the glove box,Cs2CO3 (0.6 mmol) and benzofuran-2-carbaldehyde (0.2 mmol) were weighed into 25 mL of the reaction tube,Measure the amount of DMA (1 mL) into the reaction tube.A bromodifluoromethylphosphonium salt (0.6 mmol) was weighed,Treated with DMA (2 mL)Inhalation into the syringe.Stirred at room temperature,A DMA solution of bromodifluoromethylphosphonium salt was injected into the reaction tube at a rate of 0.5 mL / h with a syringe pump.After the injection, the reaction is over. The solution in the reaction tube was transferred to a separatory funnel, 15 mL of water was added, extracted three times with dichloromethane (10 mL x 3), and the organic phases were combined and washed three times with water (10 mL x 3). The final obtained organic phase was dried over anhydrous sodium sulfate, and the solid was filtered off, the solvent removed by rotary evaporation, on a silica gel column with n-pentane and ethyl acetate as eluent, to give the final isolated product difluoromethyl, yield 72%, purity> 99.9%., 4265-16-1

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

Reference£º
Patent; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; Xiao, Jichang; Deng, Zuyong; Lin, Jinhong; (37 pag.)CN106146556; (2016); 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.196799-45-8,2,3-Dihydrobenzofuran-7-carbaldehyde,as a common compound, the synthetic route is as follows.

(4′-(Pyridin-2-yl)tetrahydrospiro[bicyclo[3.1.0]hexane-3,2′-pyran]-4′-yl)ethylamine (68E) (0.22 g, 0.808 mmol) dissolved in dichloromethane (10 mL)In the middle, sodium sulfate (0.57g, 4.04mmol)And 2,3-dihydrobenzofuran-7-carbaldehyde (0.144 g, 0.97 mmol) was added to the reaction.The reaction was carried out overnight at room temperature. Sodium borohydride(0.046 g, 1.10 mmol) was added to the reaction, and the reaction was stirred for 10 minutes.Further methanol (10 mL) was added and the reaction was stirred for 1 hour.The reaction was quenched with water and aqueous was extracted with dichloromethane (20mL¡Á3).The combined organic phases were washed with a saturated sodium chloride solution (30 mL).Dry with anhydrous sodium sulfate, filter, and concentrate the filtrate.Column chromatography on crude product (dichloromethane/methanol (v/v) = 50:1 to 20:1)Obtaining a yellow oily liquidN-((2,3-dihydrobenzofuran-7-yl)methyl)-2-(4′-(pyridin-2-yl)tetrahydrospiro[bicyclo[3.1.0]hexane-3, 2′-pyran]-4′-yl)ethylamine (76B) (0.22 g, yield: 67.5%)., 196799-45-8

The synthetic route of 196799-45-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Sichuan Hai Sike Pharmaceutical Co., Ltd.; Fan Jiang; Zhu Fengfei; Chen Qingping; Wang Chengtao; (251 pag.)CN109206417; (2019); A;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

16859-59-9, 3-Hydroxyisobenzofuran-1(3H)-one is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

16859-59-9, General procedure: 2-Formylbenzoic acid (1a; 1.0 equiv) and DMAP (0.1 equiv) were dis-solved in CH2Cl2 (0.15 M), producing a colorless clear solution. Thedesired carboxylic anhydride (2.0 equiv) and triethylamine (1.0equiv) were subsequently added and the reaction mixture was stirredat r.t. until complete conversion of the starting material was achieved(monitored by TLC). The solvent was removed under reduced pres-sure and the crude products were purified by column chromatogra-phy (n-hexane/EtOAc, 2:1).

The synthetic route of 16859-59-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Niedek, Dominik; Schuler, Soeren M.M.; Eschmann, Christian; Wende, Raffael C.; Seitz, Alexander; Keul, Felix; Schreiner, Peter R.; Synthesis; vol. 49; 2; (2017); p. 371 – 382;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

496-41-3, Benzofuran-2-carboxylic acid is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: 2-(2-Furyl)-5,5-dimethyl-4-oxo-4,5-dihydro-3-furancarbonitrile (3a). To a stirred solutionoffuran-2-carboxylic acid (1a) (112 mg,1 mmol) and 4-hydroxy-4-methyl-2-pentynenitrile (2a) (135 mg,1.2 mmol) in MeCN (5 mL), Et3N (101 mg,1 mmol) was added dropwise over 1 min. The reaction mixture was irradiated with microwave at 100 C at 1.2 atm for 2 h (or was stirred at 100 C for 5 h). The residue was concentrated and washed with a mixture of C5H12-(CH3)2CO, 5:1 and 3:1, and then recrystallized with (CH3)2CO to give the desired product 3a as colorless crystals (172 mg, 85% or163 mg, 80% at 100C);

496-41-3, The synthetic route of 496-41-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Trofimov, Boris A.; Stepanov, Anton V.; Malkina, Anastasiya G.; Volostnykh, Olga G.; Shemyakina, Olesya A.; Ushakov, Igor A.; Synthetic Communications; vol. 45; 23; (2015); p. 2718 – 2729;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.15832-09-4,6-Methoxy-3(2H)-benzofuranone,as a common compound, the synthetic route is as follows.

General procedure: Classical heating procedure A: 1g of Al2O3-KF was added to the benzofuranone derivative (0.6 mmol) and the aldehyde (1.0-1.5 eq) dissolved in acetonitrile (1-2 mL). The mixture was evaporated under vacuum and the resulting solid was heated at 70 C until TLC showed disappearance of the starting material (3-8 h). The mixture was extracted with ethanol and Al2O3-KF was removed by filtration. The filtrate was evaporated under reduced pressure to afford the corresponding crude aurone., 15832-09-4

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

Reference£º
Article; Boussafi, Karima; Villemin, Didier; Bar, Nathalie; Belghosi, Mabrouk; Journal of Chemical Research; vol. 40; 9; (2016); p. 567 – 569;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4687-25-6,Benzofuran-3-carbaldehyde,as a common compound, the synthetic route is as follows.

General procedure: Titanium tetrachloride (1.90 g, 10 mmol) was slowly added to100 mL of anhydrous THF at 0 ¡ãC, followed by addition of 5 mmol of the aldehyde (1) and stirred for 10 min, then ethyl 2-(3-bromopyridin-2-yl)acetate (2) (1.47 g, 6 mmol) was added. Subsequently, a solution of pyridine (3.16 g, 40 mmol) in 25 mL of anhydrous THF was added dropwise during a period of 30-60 min at 0 ¡ãC. The reaction mixture was then stirred for 1 h at room temperature and refluxed for 24 h. After that the mixture was poured on to crashed ice and extracted with ethyl acetate (4 30 mL). The combined extracts were successively washed with brine, saturated sodium hydrogen carbonate and brine, and then dried over anhydrous MgSO4. The organic phase was filtrated and the solvent was removed in vacuo, the residue was purified by column chromatography (silica gel) using PE/EA (5:1) / DCM/MeOH (50:1) to provide 3.

4687-25-6, As the paragraph descriping shows that 4687-25-6 is playing an increasingly important role.

Reference£º
Article; Li, Bo; Yue, Zhi-Zhou; Feng, Jian-Ming; He, Qian; Miao, Ze-Hong; Yang, Chun-Hao; European Journal of Medicinal Chemistry; vol. 66; (2013); p. 531 – 539;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.23145-07-5,5-Bromobenzofuran,as a common compound, the synthetic route is as follows.

To a solution of the product from Step B (2 g) in ether (20 ml) at -78 C. was added t-BuLi dropwise. After stirring for 20 min, DMF (950 mg) was added dropwise and the mixture was stirred at ?25 C. for 3 hrs and then warmed to room temperature overnight. Saturated ammonium chloride was added and the solution was extracted with ether. The ether layer was washed with brine, dried with MgSO4, filtered and concentrated in vacuo to give 980 mg of crude product (67percent)., 23145-07-5

23145-07-5 5-Bromobenzofuran 90015, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; Schering Corporation; US2004/106794; (2004); 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.81742-10-1,3,6-Dichlorotrimellitic Anhydride,as a common compound, the synthetic route is as follows.,81742-10-1

General procedure: A mixture of compound 14 (1 g, 6.7 mmol) and 3,6-dichlorotrimellitic anhydride (875 mg, 3.35 mmol) in 5 mL polyphosphoric acid is heated to 180 C. overnight. After cooling to room temperature, the mixture is poured into ice/water, and stirred for 30 min. The resulting precipitate is filtered, washed with water, and dried under vacuum. The crude product is purified on silica gel using CH2Cl2/MeOH. Yield: 438 mg (25%).

81742-10-1 3,6-Dichlorotrimellitic Anhydride 15883776, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; Ying, Laiqiang; (22 pag.)US10513610; (2019); B1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

19477-73-7, 6-Bromoisobenzofuran-1(3H)-one is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To 2 dram, stir-bar equipped vials, were added the aryl bromides (1.0 equiv). A stock solution of Ir[dF(CF3)ppy]2(dtbbpy)PF6 (1.0 mol%) and carboxylic acid 5 (1.1 equiv) in DMF (0.15 M with respect to carboxylic acid 5) was prepared, and to this stock solution was added TMG (1.1 equiv). The resulting stock solution was kept under a blanket of nitrogen. A separate solution of [Ni(dtbbpy)(H2O)4]Cl2 (10 mol%) in DMF (0.04 M) was prepared. The stock solution of Ir cat./acid/TMG was added to the aryl bromide monomers, followed by the Ni stock solution. The reaction mixtures were purged by blowing nitrogen over the top, sealed, and irradiated with blue LED (34 W LED Kessil lamps) for 24 h at room temperature. The reaction mixtures were diluted with EtOAc (3 mL) and H2O (4 mL). The organic layer was separated and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography with a solvent gradient from 0%EtOAc/hexanes to 100% EtOAc/hexanes to deliver the title compound.

19477-73-7, As the paragraph descriping shows that 19477-73-7 is playing an increasingly important role.

Reference£º
Article; Suen, Linda M.; Wang, Cheng; Hunter, David N.; Mitchell, Helen J.; Converso, Antonella; Elmarrouni, Abdellatif; Synthesis; vol. 50; 16; (2018); p. 3177 – 3186;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem