Day: November 12, 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.24673-56-1,3-Methylbenzofuran-2-carboxylic acid,as a common compound, the synthetic route is as follows.

To a solution of 3- methylbenzo[b]furan-2-carboxylic acid ( 1 eq, 52 mmol), methylamine hydrochloride (1.1 eq, 57.52 mmol), /V,/V-diisopropylethylamine (2.2 eq, 114.4 mmol), and HOBt (1.1 eq, 57.52 mmol) in DMF (150 mL) was added EDC (1.1 eq, 57.52 mmol). The reaction mixture was heated to 70 C overnight. The solvent was reduced to a few mL. The crude reaction mixture was diluted with CH2Cl2 and washed with saturated aqueous sodium bicarbonate. The organic extracts were dried over sodium sulfate and concentrated under reduced pressure. Purification by flash column chromatography (4 Precursor a, 20:50:30, EtOAc:CH2Cl2:hexanes) yielded N, 3- dimethylbenzofuran-2-carboxamide (9.24 g, 48.9 mmol, 94%) as a white solid. 1H NMR (500 MHz, Chloroform-d): 57.61 (dt, J = 7.8, 1.0 Hz, 1H), 7.45 – 7.36 (m, 2H), 7.29 (ddd, J = 8.0, 6.4, 1.7 Hz, 1H), 6.64 (s, 1H), 3.03 (d, / = 5.0 Hz, 3H), 2.63 (s, 3H). 13C NMR (126 MHz, Chloroform-d): 5 161.10, 153.35, 142.96, 129.95, 127.04, 123.19, 122.19, 121.07, 111.55, 25.86, 9.00.

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

Reference£º
Patent; THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS; HERGENROTHER, Paul J.; GEDDES, Emily Jane; DROWN, Bryon Shane; MOTIKA, Stephen E.; PARKER, Erika Nicole; (141 pag.)WO2019/177975; (2019); 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

Isobenzofuran-1(3H)-one (6.6 g, 49.6 mmol), NBS (9.7 g,54.5 mmol) and AIBN (0.8 g, 4.9 mmol) were diluted in dry carbon tetrachloride (CCl4) (200 mL) and heated to72C for 2.5h. The mixture was cooled to room temperatureovernight, filtered, and the residue was washed withpetroleum ether. The filtrate was concentrated in vacuo toprovide the crude product, which was recrystallized fromcyclohexane to give 2 (8.6 g, 81.8%) as a light brown solid;m. p. 79-82C (lit. [24]: 76-78C). – 1H NMR (600MHz,CDCl3): =7.65 (d, 1H, J=7.2Hz), 7.80-7.77 (m, 1H), 7.64-7.61(m, 2H), 7.41 (s, 1H). – 13C NMR (150MHz, CDCl3): =167.3,148.8, 135.2, 130.9, 125.9, 124.0, 123.5, 74.6.

87-41-2, 87-41-2 Isobenzofuran-1(3H)-one 6885, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Article; Fan, Lingling; Luo, Bilan; Luo, Zhongfu; Zhang, Li; Fan, Judi; Xue, Wei; Tang, Lei; Li, Yong; Zeitschrift fur Naturforschung, B: Chemical Sciences; (2019);,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.6940-49-4,3-Bromophthalide,as a common compound, the synthetic route is as follows.

General procedure: Amine (1.05 Equiv) was added to Isatoic anhydride (1.0 Equiv) in water (4.0mL) and PEG400 (1.0mL) at RT and stirred for 1-2 hr. Upon completion of SM by TLC, added 3-bromoisobenzofuran-1(3H)-one (1.1 Equiv) and warm the reaction mixture to 90-95 C and maintained for 10-14 h. After completion of the reaction, cool the reaction mass up to 25-30 C and product was filtered and further purified via column chromatography through silica gel stationary phase and Ethyl acetate & Heptane mixture as eluent., 6940-49-4

As the paragraph descriping shows that 6940-49-4 is playing an increasingly important role.

Reference£º
Article; Madhubabu; Shankar; Reddy, G. Rajeshwar; Rao, T. Srinivasa; Basaveswara Rao, Mandava V.; Akula, Raghunadh; Tetrahedron Letters; vol. 57; 46; (2016); p. 5033 – 5037;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

54008-77-4, 2-Bromobenzofuran is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

54008-77-4, General procedure: PdCl2(dppf), PdCl2(tbpf) and (A.caPhos)PdCl2. A mixture of the halogenated heterocycle (0.66 mmol) in anhydrous THF (13.2 mL) was degassed by bubbling argon for few minutes. Then, PdCl2(dppf) (27.0 mg, 0.033 mmol, 5.0 mol%), TMEDA (0.130 g, 1.12 mmol, 1.7 equiv) and finally NaBH4 (42.4 mg, 1.12 mmol, 1.7 equiv) were introduced in sequence. The mixture was stirred at room temperature under argon for the proper time and then worked up as described above.

As the paragraph descriping shows that 54008-77-4 is playing an increasingly important role.

Reference£º
Article; Chelucci, Giorgio; Figus, Susanna; Journal of Molecular Catalysis A: Chemical; vol. 393; (2014); p. 191 – 209;,
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.

5-bromobenzofuran (500 mg, 2.56 mmol) was dissolved in THF solution of isobutylzinc(H) bromide (0.5M, 15 mL, 7.40 mmol) in a microwave reaction tube. Pd(P1BUs)2 (65 mg, 0.128 mmol, 0.05 eqv.) was added to this solution. The mixture was purged with N2 gas for 3-5 min and heated at 100 0C for 30 min under microwave irradiation. Upon completion of the reaction, the reaction mixture was diluted with ethyl acetate, washed with IN HCl aqueous solution, brine, filtered through Celite. The filtrate was dried over Na2SO4 and concentrated. The residue was purified by silica gel column chromatography (ISCO system, 5percent EtOAc in hexanes) to give 0.331 g desired product (74percent yield): 1H NMR (400 MHz, CDCl3) delta 7.59 (s, IH), 7.35 (d, IH), 7.07 (d, IH), 6.70(s, IH), 2.59 (d, 2H)5 1.9 (m, IH), 0.9 (d, 6H).

23145-07-5, The synthetic route of 23145-07-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; PREDIX PHARMACEUTICALS HOLDINGS, INC.; WO2007/61458; (2007); A2;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

54109-03-4, 5-Chloroisobenzofuran-1(3H)-one is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

54109-03-4, Example 5 Under a nitrogen atmosphere, a mixture of NiCl2 (0.2 g, 0.0015 mol) and triphenylphosphine (1.6 g, 0.0061 mol) in acetonitrile (80 ml)was heated at reflux for 45 minutes. After cooling to room temperature, zinic powder was added (0.39 g, 0.006 mol) at stirred for 15 minutes before a solution of 5-chloro-3H-isobenzofuran-1-one (3.4 g, 0.02 mol) in THF (40 mL) was added. After stirring for a further 10 minutes, NaCN (1.1 g, 0.021 mol) was added and the reaction heated at 70¡ã C. for 3 hrs, cooled, diluted with acetonitrile (50 mL), and then filtered through celite. The filtrate was concentrated under reduced pressure and the residue was refluxed in water (150 mL) for 10 minutes and allowed to cool to room temperature. Filtration and followed by drying in vacuo give the crude 5-cyano-3H-isobenzofuran-1-one (2.5 g).

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

Reference£º
Patent; H. Lundbeck A/S; US2002/198391; (2002); A1;,
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

6-Bromo-3H-isobenzofuran-1-one (5.0 g, 23.47 mmol) was weighed and added to a three-neck bottle.Measure tetrahydrofuran: methanol: water (2:1:1, 80 mL), add to a three-neck bottle, stir for 10 minutes.After dissolution, lithium hydroxide (3.45 g, 70.42 mmol) was added and stirred at room temperature for 16 hours.After the reaction of the raw materials was monitored by thin layer chromatography, the reaction mixture was concentrated, and water (100 mL) was added.The pH was adjusted to 3 with 2N hydrochloric acid and extracted three times with 100 mL of ethyl acetate.The organic phase is then washed with water and the organic phase is washed with saturated sodium chloride.Dried over anhydrous sodium sulfate, filtered and concentrated.This gave 3.3 g (91%) of a white solid.

19477-73-7, The synthetic route of 19477-73-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Shanghai Yilishe Biological Co., Ltd.; Zhang Lihai; Gao Zhichao; Huang Ximing; Liu Hui; Hu Min; Jiang Yan; (72 pag.)CN108250058; (2018); 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.24673-56-1,3-Methylbenzofuran-2-carboxylic acid,as a common compound, the synthetic route is as follows.

To a solution of the 3-methylbenzofuran-2-carboxylic acid (0.57 mmol) in anhydrous THF (5 mL) was added LDA (1.19 mmol) at 0 C. The resulting red solution was stirred for 30 min then a solution of 1 -(2-bromoethoxy)naphthalene (0.57 mmol) in 1 mL of THF (lmL) was added to the reaction mixture. The cooling bath was removed and stirring was continued for 12 h. The reaction was quenched by addition of saturated NH4C1 aqueous solution (5 mL), and the THF was removed under vacuum. The aqueous layer was extracted with EtOAc, and the organics were combined and dried over Na2S04. The mixture was concentrated and purified by flash chromatography (Combi-flash Rf Hexane/EtO Ac gradient) to give the title compound. MS (ES) 347.1 (M+H), 24673-56-1

24673-56-1 3-Methylbenzofuran-2-carboxylic acid 600591, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; VANDERBILT UNIVERSITY; LEE, Taekyu; PELZ, Nicholas F.; BELMAR, Johannes; BIAN, Zhiguo; OLEJNICZAK, Edward T.; FESIK, Stephen W.; CHAUDER, Brian A.; WO2014/47427; (2014); A2;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.64169-34-2,5-Bromoisobenzofuran-1(3H)-one,as a common compound, the synthetic route is as follows.

5-Bromoisobenzofuran-l(3H)-one (1.0 g, 4.69 mmol), NBS (835 mg, 4.69 mmol), and carbon tetrachloride (15.6 mL) were heated to reflux in a 50 mL flask carrying a reflux condenser equipped with a drying tube. The reaction mixture was exposed to light of an ordinary 100-W unfrosted light bulb placed 6-8″ from the flask. After 30 min, the succinimide was removed by filtration and the filtrate was concentrated under atmospheric pressure to give crude 3,5-dibromoisobenzofuran-l(3H)-one. To 3,5-dibromoisobenzofuran-l(3H)-one was added methanol directly to afford 5-bromo-3-methoxyisobenzofuran-l(3H)-one. LC/MS: [(M+l)]+ = 244

64169-34-2, 64169-34-2 5-Bromoisobenzofuran-1(3H)-one 603144, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; MERCK SHARP & DOHME CORP.; PASTERNAK, Alexander; PIO, Barbara; CHOBANIAN, Harry, R.; SHI, Zhi-Cai; DONG, Shuzhi; GUO, Yan; WALSH, Shawn, P.; GUO, Zhiqiang; FERGUSON, Ronald, D.; CATO, Brian; (114 pag.)WO2016/60941; (2016); 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.6296-53-3,N-(1,3-Dioxo-1,3-dihydroisobenzofuran-4-yl)acetamide,as a common compound, the synthetic route is as follows.

6296-53-3, [0093] A stirred solution of l-(3-ethoxy-4-methoxyphenyl)-2- methylsulfonylethylamine (1.0 g, 3.7 mmol) and 3-acetamidophthalic anhydride (751 mg, 3.66 mmol) in acetic acid (20 mL) was heated at reflux for 15 h. The solvent was removed in vacuo to yield an oil. Chromatography of the resulting oil yielded the product as a yellow solid (1.0 g, 59% yield): mp, 144 C; 1H NMR (CDC13) delta: 1.47 (t, J=7.0 Hz, 3H, CH3), 2.26 (s, 3H, CH3), 2.88 (s, 3H, CH3), 3.75 (dd, J=4.4, 14.3 Hz, 1H, CH), 3.85 (s, 3H, CH3), 4.11 (q, J=7 Hz, 2H, CH2), 5.87 (dd, J=4.3, 10.5 Hz, 1H, NCH), 6.82-6.86 (m, 1H, Ar), 7.09-7.11 (m, 2H, Ar), 7.47 (d, J= 7 Hz, 1H, Ar), 7.64 (t, J= 8 Hz, 1H, Ar), 8.74 (d, J= 8 Hz, 1H, Ar), 9.49 (br s, 1H, NH); 13C NMR (CDC13) delta: 14.61, 24.85, 41.54, 48.44, 54.34, 55.85, 64.43, 111.37, 112.34, 115.04, 118.11, 120.21, 124.85, 129.17, 130.96, 136.01, 137.52, 148.54, 149.65, 167.38, 169.09, 169.40; Anal Calc’d. for C22H24NO7S : C, 57.38; H, 5.25; N, 6.08. Found: C, 57.31; H, 5.34; N, 5.83.

As the paragraph descriping shows that 6296-53-3 is playing an increasingly important role.

Reference£º
Patent; CELGENE CORPORATION; DAY, Robert; (60 pag.)WO2016/25686; (2016); A1;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem