Tag: M.W:200-300

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.360576-01-8,Methyl 6-bromobenzo[b]thiophene-2-carboxylate,as a common compound, the synthetic route is as follows.

General procedure: The solution of compound 2a-2n (1.1 mmol) in water (10 mL)was stirred and then potassium hydroxide pellets (5.4 mmol) wereadded, which was refluxed for 3 h. The aqueous layer was thenacidified to pH 1 with 1M hydrochloric acid solution. The aqueouslayer was extracted with dichloromethane (3 x 15 mL). The combinedorganic layers were dried with sodium sulfate, filtered, andthe solvents were removed under reduced pressure to afford thetitle compound 3a-3n [31,34]., 360576-01-8

360576-01-8 Methyl 6-bromobenzo[b]thiophene-2-carboxylate 22474078, abenzothiophene compound, is more and more widely used in various fields.

Reference£º
Article; Cai, Guiping; Yu, Wenying; Song, Dongmei; Zhang, Wenda; Guo, Jianpeng; Zhu, Jiawen; Ren, Yuhao; Kong, Lingyi; European Journal of Medicinal Chemistry; vol. 174; (2019); p. 236 – 251;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

34761-09-6, Ethyl 3-aminobenzo[b]thiophene-2-carboxylate is a benzothiophene compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a solution of 3-aminobenzo[b]thiophene-2-carboxylate 7 (0.9 mmol) in glacial acetic acid (5ml) water solution of NaNO2( 1.8 mmol) was added dropwise. The mixture was left under stirring for 2h at rt. Then ammonium acetate (32.4 mmol) and an appropriate primary amine 9a-e (10 mmol) were added. The precipitate was filtered off, and the crude was recrystallized from ethanol.

34761-09-6, The synthetic route of 34761-09-6 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Lauria, Antonino; Alfio, Alessia; Bonsignore, Riccardo; Gentile, Carla; Martorana, Annamaria; Gennaro, Giuseppe; Barone, Giampaolo; Terenzi, Alessio; Almerico, Anna Maria; Bioorganic and Medicinal Chemistry Letters; vol. 24; 15; (2014); p. 3291 – 3297;,
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Benzothiophene | C8H6S – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.89673-36-9,tert-Butyl benzo[b]thiophen-2-ylcarbamate,as a common compound, the synthetic route is as follows.

89673-36-9, b; 1-Benzothiophen-2-amine[00118] To a solution of 1 ,1-Dimethylethyl 1-benzothien-2-ylcarbamate (1.0 g, 4.01 mmoles) in DCM (10 ml_) was added TFA (2.0 mL) and stirred for 12 h. The reaction mixture was concentrated, and the resulted residue was redissolved in DCM and washed with 1 N NaOH (2×50 mL), brine and dried over Na2SO4. The mixture was filtered and concentrated to afford pure product (0.54 g) in 91 % yield. LCMS (m/z): 150.0 (M+H).

89673-36-9 tert-Butyl benzo[b]thiophen-2-ylcarbamate 13182766, abenzothiophene compound, is more and more widely used in various fields.

Reference£º
Patent; NPS PHARMACEUTICALS, INC.; GLAXOSMITHKLINE; WO2006/41968; (2006); A1;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

4923-87-9,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4923-87-9,5-Bromobenzothiophene,as a common compound, the synthetic route is as follows.

General procedure: A 25mL Schlenk tube was charged with Cu2O(0.05mmol),ArX (0.5mmol), NHR1R2(0.75mmol), NaOH (1mmol),TBAB (0.1mmol), L1 (0.1mmol) and water (1mL). Themixture was stirred at 130C for 24h. The reaction mixturewas extracted with ethyl acetate (3 ¡Á 10mL), washed withwater and brine, dried over anhydrous Na2SO4,and concentratedin vacuo. The residue was purified by flash columnchromatograph on silica gel (ethyl acetate/petroleum etheras the eluent) to provide the target products 3a-3w.

The synthetic route of 4923-87-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Wang, Xiaochuang; Meng, Fei; Zhang, Jie; Xie, Jianwei; Dai, Bin; Catalysis Letters; vol. 148; 4; (2018); p. 1142 – 1149;,
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Benzothiophene | C8H6S – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4923-87-9,5-Bromobenzothiophene,as a common compound, the synthetic route is as follows.

Step E: To a solution of diisopropylamine (15.5 mL, 110 mmol) in THF (100 mL) at 0 C. was added n-butyllithium (40 mL of 2.5M in hexanes, 100 mmol). The resultant reaction solution was stirred at 0 C. for 30 minutes and then cooled to -40 C., before it was cannulated to a solution of 5-bromobenzothiophene (10.5 g, 50.0 mmol) and chlorotrimethylsilane (12.7 mL, 100 mmol) in THF (150 mL) at -78 C. The reaction solution was stirred at -78 C. for 1 hour, and then it was quenched with aqueous ammonium chloride at -78 C. and warmed to room temperature. The resultant mixture was extracted with ethyl acetate and the organic extract obtained was washed with brine, dried over sodium sulfate and concentrated in vacuo. The residue obtained was purified by flash column chromatography (hexanes to 98:2 hexanes/ethyl acetate) to give the desired 5-bromo-2-trimethylsilylbenzothiophene (14.1 g, 98%) as a clear colorless oil: 1H NMR (500 MHz, CDCl3) delta 7.93 (d, J=2.0 Hz, 1H), 7.72 (d, J=8.5 Hz, 1H), 7.39 (dd, J=8.5, 2.0 Hz, 1H), 7.37 (s, 1H), 0.38 (s, 9H).

4923-87-9, The synthetic route of 4923-87-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; AMR Technology, Inc.; US2007/21408; (2007); A1;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4923-87-9,5-Bromobenzothiophene,as a common compound, the synthetic route is as follows.

General procedure: Under an argon atmosphere, Pd(OAc)2 (3.3 mg, 0.015 mmol, 5 mol%),PCy3¡¤HBF4 (22.1 mg, 0.06 mmol, 20 mol%), benzaldehyde N-tosylhydrazone1a (99 mg, 0.36 mmol), 4-bromo-1,1?-biphenyl (2a; 70 mg,0.3 mmol), and Cs2CO3 (195 mg, 0.6 mmol) were successively addedto a flame-dried 25 mL Schlenk flask. The reaction flask was degassedthree times with argon. Then anhyd toluene (2.7 mL) and i-PrOH (0.3mL) were added with a syringe. Note that the aryl bromide in oil formwas added to the reaction flask prior to i-PrOH. The reaction washeated at 80 C with stirring for about 12 h, then it was cooled to r.t.,and filtered through a short pad of neutral alumina with EtOAc (25mL) as eluent. Solvent was then removed in vacuo to leave a crudemixture, which was purified by silica gel column chromatography(eluent: PE) to give 3a3d as a white solid (59 mg, 80%)

4923-87-9, 4923-87-9 5-Bromobenzothiophene 2776578, abenzothiophene compound, is more and more widely used in various fields.

Reference£º
Article; Xia, Yamu; Hu, Fangdong; Xia, Ying; Liu, Zhenxing; Ye, Fei; Zhang, Yan; Wang, Jianbo; Synthesis; vol. 49; 5; (2017); p. 1073 – 1086;,
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Benzothiophene | C8H6S – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.360575-29-7,Methyl 4-bromobenzo[b]thiophene-2-carboxylate,as a common compound, the synthetic route is as follows.

12202] A mixture of 353 mg of methyl 4-bromobenzo[b] thiophene-2-carboxylate, 217 mg of 2-thiophene boronic acid, 287 mg of lithium chloride, 248 mg of sodium carbonate, 75 mg of tetrakis(triphenylphosphine)palladium (0), 10 ml of 1 ,4-dioxane, and 5 ml of water was stirred for 3 hours at 100 C. under a nitrogen atmosphere. After being cooled to room temperature, the reaction mixture was concentrated under reduced pressure. Chloroform and water were added to the residues, and insoluble matter was separated by filtration. The aqueous layer was extracted twice by using chloroform, and the collected organic layer was washed with saturated saline, dried over magnesium sulfate, and then concentrated under reduced pressure. The residues were subjected to silica gel colunm chromatography, thereby obtaining 350 mg of methyl 4-(2-thienyl)benzo[b]thiophene-2-carboxylate (hereinafier, described as a ?compound 52 of the present invention?).12203] Compound 52 of the Present Invention 12204] ?H-NMR (CDC13) oe: 8.42 (s, 1H), 7.84-7.82 (m,1H), 7.51-7.48 (m, 2H), 7.44-7.42 (m, 1H), 7.36-7.35 (m,1H), 7.20-7.18 (m, -1H), 3.95 (s, 3H)., 360575-29-7

The synthetic route of 360575-29-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; SUMITOMO CHEMICAL COMPANY, LIMITED; Mukumoto, Fujio; Tamaki, Hiroaki; Kusaka, Shintaro; Iwakoshi, Mitsuhiko; US2015/282482; (2015); A1;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem

1423-61-6, 7-Bromobenzo[b]thiophene is a benzothiophene compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a 10 mL round-bottom flask were added Cat.III (3.2 mg, 0.005 mmol, 2 mol %), Ag2O (116 mg, 0.5 mmol, 2 equiv), benzoquinone (14 mg, 0.125 mmol, 0.5 equiv), Cs(tfa) (64 mg, 0.25 mmol, 1 equiv.), benzothiophene/benzofurans (0.25 mmol, 1 equiv), aryl MIDA boronate ( 0.375 mmol, 1.5 equiv), and 15% H2O and 2% CF3SO3H of TFA (1 mL). The reaction mixture was stirred at 30-50 C for 20 h. The suspension was cooled to room temperature and extracted with dichloromethane (3 ¡Á 10 mL). The combined organic layers were washed with 20% aqueous NaHCO3 solution (40 mL). After evaporation of the solvent the crude product was purified by chromatography on silica gel to give the desired product., 1423-61-6

1423-61-6 7-Bromobenzo[b]thiophene 12045538, abenzothiophene compound, is more and more widely used in various fields.

Reference£º
Article; Wang, Zhiwei; Li, Yabo; Yan, Beiqi; Huang, Mengmeng; Wu, Yangjie; Synlett; vol. 26; 4; (2015); p. 531 – 536;,
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4923-87-9, 5-Bromobenzothiophene is a benzothiophene compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(C) To a solution of 5-bromo-1-benzothiophene (12 g, 56.31 mmol) in dry THF (300 mL) under an inert atmosphere was added isopropyl magnesium chloride-lithium chloride complex (1.3 M in THF; 150 mL, 195 mmol) in drop-wise fashion, and the resultant solution was stirred at rt, overnight. DMF (30 mL) was then added in drop-wise fashion and the resultant solution was stirred at rt for 30 min. Water (500 mL) was added and the resulting solution was extracted with ethyl acetate (3*500 mL). The combined organic extracts were concentrated under reduced pressure and the resultant residue was purified by silica gel chromatography (0-2% EtOAC/petroleum ether) to provide benzo[b]thiophene-5-carbaldehyde (6.9 g, 68%) as a yellow solid. 1H NMR (DMSO-d6) delta 10.12 (s, 1H), 8.32 (s, 1H), 8.01 (d, J=8.4 Hz, 1H), 7.86-7.89 (m, 1H), 7.57-7.61 (m, 1H), 7.47-7.50 (m, 1H).

4923-87-9, 4923-87-9 5-Bromobenzothiophene 2776578, abenzothiophene compound, is more and more widely used in various fields.

Reference£º
Patent; Janssen Pharmaceutica NV; Liang, Yin; Demarest, Keith T.; (109 pag.)US2017/290800; (2017); A1;,
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Benzothiophene | C8H6S – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4923-87-9,5-Bromobenzothiophene,as a common compound, the synthetic route is as follows.

[0114] A mixture of 2-chloro-5-methyl-pyrimidin-4-ylamine (0.30 g, 2.1 mraol), 5- bromo-benzo[]thiophene (0.6 g, 2.8 mmol), Pd2(dba)3 (95 mg, 0.10 mmol), Xantphos (0.12 g, 0.20 mmol) and cesium carbonate (1.3 g, 4.0 mmol) was suspended in dioxane (25 mL) and heated at reflux under the argon atmosphere for 3 h. The reaction mixture was cooled to room temperature and diluted with DCM (30 mL) . The mixture was filtered and the filtrate concentrated in vacuo. The residue was purified by flash chromatography on silica gel (hexane to 30% EtOAc/hexane) to afford the title intermediate 13 (0.23 g, 40%) as a white solid. MS (ESI+): m/z 276 (M+H)+.

4923-87-9, The synthetic route of 4923-87-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; TARGEGEN, INC.; WO2007/53452; (2007); A1;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem