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CAS No. : | 7312-10-9 | MDL No. : | MFCD01929338 |
Formula : | C9H5BrO2S | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | ONNFNEFYXIPHCA-UHFFFAOYSA-N |
M.W : | 257.10 | Pubchem ID : | 737737 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H319 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With 2-(7-aza-1H-benzotriazol-1-yl)-1,1,3,3-tetratetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine; In DMF (N,N-dimethyl-formamide); | 133.7 mg (0.52 mmol) [5-BROM-L-BENZOTHIOPHEN-2-CARBONSaeURE] (Beispiel [13A),] 155.4 mg (0. [78 MMOL) (R)-3-AMINOCHINUKLIDIN-DIHYDROCHLORID,] 296.7 mg (0.78 mmol) HATU, 369.8 mg (2.86 mmol) N, N-Diisopropylethylamin und 1. 5 mL DMF werden gemaess der allgemeinen Arbeitsvorschrift C umgesetzt. Das Reaktion- gemisch wird durch praeparative HPLC gereinigt. Das Produkt wird in Acetonitril geloest und mit einem Ueberschuss an 1 N Salzsaeure versetzt. Schliesslich wird das Solvens entfernt. Es werden 175 mg (84 % d. Th. ) der Titelverbindung isoliert. ['H-NMR] (200 MHz, [DMSO-D6)] : [5] = 9.44 (br. s, 1H), 8.95 (d, [1H),] 8.30-8. 10 (m, 2H), 8.03 (d, 1H), 7.60 (m, 1H), 4.38-4. 20 (m, 1H), 3.80-3. 55 (m, 1H), 3.42-3. 05 (m, [5H),] 2.25-2. 00 (m, 2H), 1.98-1. 62 (m, 3H). HPLC (Methode [1)] : Rt = 4.1 min. MS (ESIpos) : m/z = 365 (M+H) [+] (freie Base). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
95% | With potassium hydroxide; In water; for 3h;Reflux; | 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]. |
94% | Ausgehend von 2.7 g (9.96 mmol) [5-BROM-L-BENZOTHIOPHEN-2-CARBONSaeUREMETHYL-] ester (aus Beispiel 12A) werden nach der allgemeinen Arbeitsvorschrift B 2.41 g (94 % d. Th. ) des gewuenschten Produkts erhalten. H-NMR (400 MHz, [DMSO-D6)] : [8] = 13.67 (br. s, 1H), [8.] 27 (m, 1H), 8.10 (s, [1H),] [8.] 05 (d, 1H), 7.66 (dd, 1H). HPLC (Methode [1)] : Rt = 4.5 min. | |
180 mg | With lithium hydroxide monohydrate; In methanol; water; at 75℃; for 2h; | A mixture of 200 mg of methyl 5-bromobenzo[b]thiophene-2-carboxylate, 105 mg of lithium hydroxide monohydrate,2 ml of water, and 6 ml of methanol was stirred for 2 hours at 75C. After being cooled to room temperature,the reaction mixture was concentrated under reduced pressure. Water was added to the residues, and the residue waswashed three times with tert-butyl methyl ether. Concentrated hydrochloric acid was added to the aqueous layer, andthen extraction was performed three times by using chloroform. The collected organic layer was washed with saturatedsaline, dried over magnesium sulfate, and then concentrated under reduced pressure, thereby obtaining 180 mg of 5-bromobenzo[b]thiophene-2-carboxylic acid (hereinafter, described as a "compound 11 of the present invention 1H-NMR (CDCl3) delta: 8.07 (s, 1H), 8.07 (d, 1H, J = 1.9 Hz), 7.76 (d, 1H, J = 8.7 Hz), 7.58 (dd, 1H, J = 1.9, 8.7 Hz) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Dissolve 5-bromo-benzo[&]thiophene-2-carboxylic acid (21.2 g, 82.5 mmol) inTHF (150 mL). Cool to O0C with an ice bath. Add 2M BH3 dimethyl sulfide complex in THF (82.5 mL). Stir to room temperature over 2 hours. Quench by careful addition of water. Partition between ether and saturated NaHCO3, wash with water, brine, dry, and concentrate. Purify via column chromatography eluting with 3:1 hexanes: ethyl acetate to afford a white solid (10.3 g): 1H NMR (CDCl3) delta 7.87 (m, IH), 7.67 (d, IH), 7.41 (dd, IH), 7.15 (m, IH), 4.94 (d, 2H), 1.91 (t, IH). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sulfuric acid; In dichloromethane; ethyl acetate; | EXAMPLE 274C tert-butyl 5-bromo-1-benzothiophene-2-carboxylate A mixture of Example 274B and concentrated H2SO4 (0.5 mL) in dichloromethane (100 mL) saturated with isobutylene at room temperature was stirred for 4 hours and concentrated. The concentrate was purified by flash column chromatography on silica gel with 2% ethyl acetate/hexanes to provide the desired product. | |
With sulfuric acid; In dichloromethane; ethyl acetate; | Example 274C tert-butyl 5-bromo-1-benzothiophene-2-carboxylate A mixture of Example 274B and concentrated H2SO4 (0.5 mL) in dichloromethane (100 mL) saturated with isobutylene at room temperature was stirred for 4 hours and concentrated. The concentrate was purified by flash column chromatography on silica gel with 2% ethyl acetate/hexanes to provide the desired product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydroxide; bromine; In 1,4-dioxane; ethyl acetate; | d) With stirring, 5.4 ml of bromine was added dropwise to 5N sodium hydroxide aqueous solution which has been cooled to -5 C. to 0 C. To this was added dropwise, at a temperature of -5 C. or below, a 50 ml dioxane solution of 2-acetyl-5-bromobenzo[b]thiophene obtained in the above step c). The resulting mixture was stirred for 30 minutes at room temperature and then for 30 minutes at 50 C. With ice cooling, the resulting reaction solution was adjusted to pH 2 with concentrated hydrochloric acid, and crystals thus precipitated were collected by filtration and washed with water. The crystals thus obtained were dissolved in ethyl acetate, and the solution was dried and concentrated. Crystals thus precipitated were collected by filtration and washed with toluene to obtain 6.6 g of 5-bromobenzo[b]thiophene-2-carboxylic acid. mp: 238-241 C. IR (KBr): 1671, 1554, 1518, 1443 cm-1 1 H-NMR (CDCl3) delta: 7.57 (1H, dd, J=8.6 and 1.8Hz), 7.82 (1H, d, J=8.6Hz), 8.00 (1H, s), 8.07 (1H, d, J=1.8Hz) | |
With sodium hydroxide; bromine; In 1,4-dioxane; | d Synthesis of 5-bromobenzo[b]thiophene-2-carboxylic acid: 1.25 ml of bromine was slowly added to 10 ml of 5N aqueous NaOH solution with stirring and the resulting solution was cooled to -5 C.-0 C. At the same temperature, a solution of 1.66 g of 1-(5-bromobenzo[b]thiophene-2-yl)ethan-1-one in 15 ml of 1,4-dioxane was slowly added thereto. The reaction solution was stirred for 30 minutes at room temperature and then for 30 minutes at 50 C., cooled, poured into ice-water and then adjusted to pH 2 with concentrated hydrochloric acid. The resulting precipitate was filtered, washed several times with water, dried and then purified with silica gel column chromatography [eluent: ethyl acetate/n-hexane(1:2)]. The fractions containing the desired product were combined and then evaporated to obtain 1.42 g of the title compound as a white solid. 1H NMR(CDCl3, ppm): delta 8.03(m, 1H), 7.92(s, 1H), 7.76(m, 1H), 7.50(m, 1H) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With thionyl chloride; In ethanol; | e) 6.4 g of <strong>[7312-10-9]5-bromobenzo[b]thiophene-2-carboxylic acid</strong> obtained in the above step d) was suspended in 250 ml of ethanol. With cooling on an ice bath and with stirring, 4.45 g of thionyl chloride was added dropwise to the suspension prepared above, followed by refluxing under heating for 1 hour. With ice cooling, 8.15 g of thionyl chloride was further added dropwise to the resulting mixture, followed by refluxing under heating 2 hours. The resulting reaction solution was concentrated and adjusted to pH 9 with saturated sodium bicarbonate aqueous solution. Crystals thus precipitated were collected by filtration and dried to obtain 7.0 g of ethyl <strong>[7312-10-9]5-bromobenzo[b]thiophene-2-carboxylate</strong>. A portion of the thus obtained compound was recrystallized from methanol to obtain needle crystals. mp: 94-95 C. 1 H-NMR (CDCl3) delta: 1.42 (3H, t, J=7.0Hz), 4.41 (2H, q, J=7.0Hz), 7.54 (1H, dd, J=8.8 and 1.8Hz), 7.73 (1H, d, J=8.8Hz), 7.96 (1H, s), 8.01 (1H, d) | |
In methanol; thionyl chloride; | e Synthesis of ethyl <strong>[7312-10-9]5-bromobenzo[b]thiophene-2-carboxylate</strong>: In a 100 ml flask, 1.42 g of <strong>[7312-10-9]5-bromobenzo[b]thiophene-2-carboxylic acid</strong> and 25 ml of methanol were introduced and then stirred. The resulting suspension was cooled in ice bath and 0.6 ml of thionyl chloride was slowly added thereto. The reaction solution was refluxed for one hour and then cooled. After 1.1 ml of thionyl chloride was added, the reaction solution was refluxed for further 2 hours, cooled and then adjusted to pH 9 with saturated NaHCO3 solution. The resulting precipitate was filtered, dried and then purified with silica gel column chromatography [eluent: ethyl acetate/n-hexane(1:3)]. The fractions containing the desired product were combined and then evaporated to obtain 1.3 g of the title compound as a white solid. 1H NMR(CDCl3, ppm): delta 8.01(m, 1H), 7.96(s, 1H), 7.73(m, 1H), 7.54(m, 1H), 4.41(q, 2H, J=7.0 Hz), 1.42(t, 3H, J=7.0 Hz) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
CuCN; | f Synthesis of ethyl 5-cyanobenzo[b]thiophene-2-carboxylate: In a 50 ml flask, 1.3 g of <strong>[7312-10-9]5-bromobenzo[b]thiophene-2-carboxylate</strong> and 1.02 g of CuCN were introduced and 20 ml of N-methyl-2-pyrrolidone was then added thereto. The mixture was stirred and the resulting suspension was refluxed under nitrogen atmosphere for 2 hours at 200 C. The reaction solution was cooled, poured into ice-water, vigorously stirred and then filtered to remove the unsoluble material. The filtrate was then extracted with ethyl acetate. The extract was evaporated to removed the solvent, and the residue was then purified with silica gel column chromatography [eluent: ethyl acetate/n-hexane(1:3)]. The fractions containing the desired product were combined and evaporated to obtain 330 mg of the title compound as a white solid. 1H NMR(CDCl3, ppm): delta 8.21(m, 1H), 8.09(s, 1H), 7.97(m, 1H), 7.70(m, 1H), 4.45(q, 2H, J=7.0 Hz), 1.43(t, 3H, J=7.0 Hz) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
70% | With 4-methyl-morpholine; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; 3-hydroxy-3,4-dihydrobenzotriazine-4-one; In dichloromethane; at 20℃; | To a dichloromethane (1.1 ml_) solution of Lambda/1-{3-[[(2-chloro-4- fluorophenyl)sulfonyl](methyl)amino]propyl}-L-leucinamide (45.4mg, 0.115mmol) was added <strong>[7312-10-9]5-bromo-1-benzothiophene-2-carboxylic acid</strong> (36mg, 0.138mmol), HOOBT (0.4 mg, 0.002 mmol), and NMM (0.06ml, 0.575mmol). The mixture was stirred several minutes whereupon EDCHCI (26.5mg, 0.138 mmol) was added. The reaction mixture was stirred overnight at RT. The solution was washed with 10% citric acid and brine, dried (MgSO4), filtered and concentrated to a solid. Purification by silica gel column chromatography (30%-90% ethyl acetate/hexane) gave the product as a white solid in 70% yield (51 mg): MS (m/z): 634 (M+H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
48.3% | To a suspension of <strong>[7312-10-9]5-bromobenzothiophene-2-carboxylic acid</strong> (109 mg, 0.42 mmol) in dichloromethane (5 mL) was added oxalyl chloride (2M in dichloromethane, 0.5 mL) and one drop of DMF. The mixture was stirred at room temperature for 1 hr and solvents were evaporated. The residue was diluted with benzene (10 mL) and then concentrated to dryness. The residue was dissolved in dichloromethane (5 mL) and treated with (S)-3-(5-amino-pyridin-2-ylamino)-pyrrolidine-1-carboxylic acid ethyl ester (106 mg, 0.42 mmol) in dichloromethane (5 mL) containing triethylamine (0.1 mL). The mixture was stirred at room temperature for 1 hr and solvents were evaporated. The residue was extracted with ethyl acetate and saturated ammonium chloride solution. Organic layer was washed with brine and dried over sodium sulfate. Solvents were evaporated and the residue was treated with methanol (1 mL) and hydrogen chloride in ether. Solvents were evaporated and the residue was treated with ether. The precipitate was filtered and washed with ether to give a light pink solid as (S)-3-{5-[(5-bromo-benzo[b]thiophene-2-carbonyl)-amino]-pyridin-2-ylamino}-pyrrolidine-1-carboxylic acid ethyl ester hydrochloride (100 mg, 48.3% yield). LCMS for C21H21BrN4O3S calcd. (m/e) 488, observed 489 (M+H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | With O-<[cyano(ethoxycarbonyl)methylene]amino>-1,1,3,3-tetramethyluronium tetrafluoroborate; triethylamine; In dichloromethane; at 0 - 20℃;Inert atmosphere; | Intermediate 29 5-bromo-N-methyI-N-({4-[(trifluoromethyl)oxy]phenyl}methyl)-1-benzothiophene-2-carboxamide. In a round bottom flask under argon atmosphere were placed 0.3 g of 5-bromo-1- benzothiophene-2-carboxylic acid, 0.459 g of TOTU (O-[(ethoxycarbonyl)cyanomethyl- enamino]-/V,/V,/V,/V-tetramethyluronium tetrafluoroborate) and 0.423 g of Intermediate 1 in12 ml of CH2CI2. The mixture was cooled to 0 0C and 0.49 ml of Et3N were added. The reaction mixture was stirred overnight at room temperature, then diluted with CH2CI2, washed with 1 N NaOH and brine, dried over Na2SO4, filtered and concentrated to dryness under vacuum. The residue was purified by chromatography on silica gel eluting withEtOAc-Hex 10:90 to 20:80 to afford 0.471 mg (91%) of the titled compound as a pale yellow oil.1H NMR (delta, ppm, DMSO-d6-80C): 8.11 (s, 1 H); 7.94 (d, 1 H); 7.73 (s, 1 H); 7.55 (dd, 1 H);7.42 (d, 2H); 7.33 (d, 2H); 4.75 (s, 2H); 3.12 (s, 3H). [ES MS] m/z: 445 (MH+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
10% | 12b) 5-[4-([3-(2,6-Dichlorophenyl)-5-(l-methylethyl)-4- isoxazolyl]methyl}oxy)phenyl]-l-benzothiophene-2-carboxylic acid <n="102"/>3-(2,6-Dichlorophenyl)-5-(l-methylethyl)-4-([4-(4,4,5,5-tetramethyl-l,3,2- dioxaborolan-2-yl)phenyl]oxy}methyl)isoxazole (0.178 g, 0.36 mmol), 5-bromo-l- benzothiophene-2-carboxylic acid (0.114 g, 0.44 mmol), tetrakistriphenylphosphine palladium (0) (0.030 g, 0.026 mmol), sodium carbonate (2 M) (0.8 mL, 1.6 mmol), and 1 ,2-dimethoxyethane (15 mL) were combined and heated at 85 0C with stirring under a nitrogen atmosphere for 4 hours. The reaction mixture was allowed to cool at room temperature. To the reaction mixture was added water and the pH of the aqueous mixture was adjusted to 2-3 (litmus paper) with 1 N hydrochloric acid. The acidic aqueous mixture was extracted with ethyl acetate. The organic phase was separated, washed with brine, dried over magnesium sulfate, filtered, and the filtrate was concentrated to give the crude product as a brown-orange oil. The crude product was purified by reverse phase preparative HPLC using a gradient of acetonitrile: water (50:50 to 100:0) with 0.05% trifluoroacetic acid as a modifier to give a white amorphous solid which was dried at 50 0C under high vacuum to give 0.019 g (10%) of 5-[4-([3-(2,6-Dichlorophenyl)-5-(l-methylethyl)-4- isoxazolyl]methyl}oxy)phenyl]-l-benzothiophene-2-carboxylic acid as a white amorphous solid. 1H NMR (J6-DMSO, 400 MHz): delta 13.53 (br s, IH), 8.21 (s, IH), 8.13 (s, IH), 8.08 (d, J = 8 Hz, IH), 7.75 (d, J = 8 Hz, IH), 7.61 (m, 5H), 6.92 (d, J = 9 Hz, 2H), 4.81 (s, 2H), 3.49 (septet, J = 7 Hz , IH), 1.36 (d, J = 7 Hz, 6H). ES- LCMS m/z 538 (M + H)+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With bis-(2-oxo-3-oxazolidinyl)phosphoryl chloride; triethylamine; In N,N-dimethyl-formamide; at 20℃; for 16h; | General procedure: To a solution of thieno[3,2-b]pyridine-7-carboxylic acid10(568 mg, 3.18 mmol) and tert-butyl 4-(4-((4-aminopiperidin-1-yl)methyl)-2-bromophenoxy)piperidine-1-carboxylate15(109 mg, 0.24 mmol) in DMF (5 mL) were added bis(2-oxo-3-oxazolidinyl)phosphinic chloride(BOP-Cl, 84 mg, 0.33 mmol) and triethylamine (0.092 ml, 0.66 mmol). After being stirred at room temperature for 16 h, the mixture was diluted with water (30 mL), and extracted with ethyl acetate (30 mL x 2). The organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated in vacuo, giving a residue that was subjected to column chromatography on silica gel (3% MeOH/CH2Cl2) to afford 112 mg (82%) of the boc-protected compound 11. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
95% | With N-ethyl-N,N-diisopropylamine; HATU; In dichloromethane; at 20℃; for 12h; | General procedure: To a solution of 3a-3o (1.94 mmol) in anhydrous dichloromethane(20.0 mL) and HATU (2.33 mmol) in the presence of DIEA(3.89 mmol), tert-butylpiperazine-1-carboxylate (2.14 mmol) wasadded and stirred for 12 h. After completion, dilute hydrochloricacid solution was added, extracted with dichloromethane andwashed with saturated sodium carbonate solution three times. Thecombined organic layers were washed with brine and dried with sodium sulfate, filtered, concentrated, and purified by silica gelchromatography with petroleum ether/ethyl acetate as eluent togive pure 4a-4o [34]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With palladium diacetate; | Synthesis of ethyl 5-cyclopropylbenzo[b]thiophene-2-carboxylate. A solution of <strong>[7312-10-9]5-bromobenzo[b]thiophene-2-carboxylate</strong> (2.3 g, 8 mmol), cyclopropylboronic acid (1.7 g, 20 mmol), Pd(OAc)2 (180 mg, 0.8 mmol), PCy3 (448 mg, 1.6 mmol) and K3PO4 (4.24 g, 20 mmol) in toluene (40 mL)/MeOH (4 mL)/H2O (4 mL) was stirred under reflux in nitrogen atmosphere overnight. The reaction mixture was concentrated to give a residue. The residue was diluted with H2O (30 mL) and extracted with EtOAc (50 mL **3). The combined organic layers were washed with brine (20 mL), dried over Na2SO4, filtered and concentrated to give the crude product which was purified by flash column chromatography (PE/EA=10/1) to give the product ethyl 5-cyclopropylbenzo[b]thiophene-2-carboxylate (730 mg, 37%) as a light yellow solid. ESI-MS [M+H]+: 246.9. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With oxalyl dichloride; N,N-dimethyl-formamide; at 0 - 20℃; for 2.5h; | (COCl)2 (0.30 mL, 3.4 mmol) was added dropwise with stirring to a 0 C. mixture of <strong>[7312-10-9]5-bromobenzo[b]thiophene-2-carboxylic acid</strong> (0.750 g, 2.92 mmol) in CH2Cl2 (15 mL) over 3 min. To the reaction was added DMF (0.023 mL, 0.29 mmol) followed by additional (COCl)2 (0.20 mL, 2.3 mmol). The reaction mixture was then stirred at 0 C. for 1 h. The reaction flask was removed from the ice water bath, and stirring was continued at RT for 1.5 h. The reaction was concentrated to afford 5-bromobenzo[b]thiophene-2-carbonyl chloride, which was used without further purification or characterization. |
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