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CAS No. : | 56256-14-5 | MDL No. : | MFCD08436017 |
Formula : | C8H7BrO3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | UEVXVBKBOFGKIN-UHFFFAOYSA-N |
M.W : | 231.04 | Pubchem ID : | 16215867 |
Synonyms : |
|
Num. heavy atoms : | 12 |
Num. arom. heavy atoms : | 6 |
Fraction Csp3 : | 0.12 |
Num. rotatable bonds : | 2 |
Num. H-bond acceptors : | 3.0 |
Num. H-bond donors : | 1.0 |
Molar Refractivity : | 47.59 |
TPSA : | 46.53 Ų |
GI absorption : | High |
BBB permeant : | Yes |
P-gp substrate : | No |
CYP1A2 inhibitor : | No |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | No |
Log Kp (skin permeation) : | -5.95 cm/s |
Log Po/w (iLOGP) : | 1.77 |
Log Po/w (XLOGP3) : | 2.48 |
Log Po/w (WLOGP) : | 2.16 |
Log Po/w (MLOGP) : | 2.06 |
Log Po/w (SILICOS-IT) : | 1.89 |
Consensus Log Po/w : | 2.07 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 0.0 |
Bioavailability Score : | 0.56 |
Log S (ESOL) : | -3.07 |
Solubility : | 0.195 mg/ml ; 0.000846 mol/l |
Class : | Soluble |
Log S (Ali) : | -3.1 |
Solubility : | 0.183 mg/ml ; 0.000791 mol/l |
Class : | Soluble |
Log S (SILICOS-IT) : | -2.76 |
Solubility : | 0.403 mg/ml ; 0.00175 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 0.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 1.46 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | 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 |
---|---|---|
90% | for 24 h; Reflux | General procedure: The benzoic acid (1-4 g)was dissolved in methanol (25-75 mL),before conc. H2SO4 (2-6 mL) was added dropwise while stirring.The reaction mixture was heated to reflux and stirred for 24 h. Thereaction mixture was quenched in a saturated aq NaHCO3 solution(100-200 mL) ensuring neutral to basic pH, and the aqueous phase was extracted with CH2Cl2 (4 x 50 mL). The combined organic phases were washed with saturated aq NaCl solution (25-50 mL),dried over anhydrous Na2SO4 and filtered. Concentration yielded the target compound in high yield and purity. Methyl 4-bromo-3-methoxybenzoate was prepared as described in Section 4.5, starting with 4-bromo-3-methoxybenzoic acid (845 mg, 3.67 mmol). The procedure yielded 808 mg(3.30 mmol, 90percent) of methyl 4-bromo-3-methoxybenzoate a white crystalline product; |
69% | at 0 - 20℃; for 16 h; Inert atmosphere | Methyl 4-bromo-3-methoxybenzoate (0284) To a solution of 4-bromo-3-methoxybenzoic acid (10.0 g, 43.28 mmol) in methanol (400 mL) was added acetyl chloride (19 mL, 266.25 mmol) dropwise at 0° C. The resulting solution was then stirred for 16 h at room temperature. The reaction mixture was concentrated under reduced pressure and the residue was purified by flash chromatography eluting with ethyl aceate in hexane (0percent to 5percent gradient) to yield methyl 4-bromo-3-methoxybenzoate as white solid (7.3 g, 69percent). MS: m/z=245.0 [M+H]+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
66% | With sodium hydroxide In methanol; water at 20℃; for 6 h; | Aq. sodium hydroxide (2 M, 40 mL) was added to a solution of methyl 4-bromo-3-methoxy-benzoate (13, 6.52 g, 27.1 mmol) in methanol (200 mL) and the mixture was stirred for 6 h at room temp. Deionized water (100 mL) was added and methanol was distilled off in vacuo.The remaining aq. phase was washed with dichloromethane (3 x 100 mL) and acidified with hydrochloric acid (6 M). The precipitate was filtered off and was washed thoroughly with water yielding a colourless solid. Yield: 4.10 g (17.8 mmol, 66percent)(ref[5]: 89percent). M. p.: 220 °C.1H NMR (500 MHz, DMSO-d6): δ = 13.21 (br. s, 1H,CO2H), 7.71 (d, 1H,3J = 8.2 Hz, Ar-H-5), 7.54 (d, 1H,4J = 1.8 Hz, Ar-H-2), 7.46 (dd,1H,3J = 8.2 Hz,4J = 1.8 Hz, Ar-H-6), 3.91 (s, 3H, OCH3) ppm.13C NMR (125 MHz,DMSO-d6): δ = 167.1 (s, CO2H), 155.9 (s, Ar-C-3), 133.6 (d, Ar-C-5), 132.1 (s, Ar-C-1), 123.2 (d, Ar-C-6), 116.5 (s, Ar-C-4), 113.0 (d, Ar-C-2), 56.8 (q, OCH3) ppm. MS(EI, 70 eV): m/z = 230/232 (100/98) [M]+·. |
56% | With hydrogenchloride; lithium hydroxide In tetrahydrofuran; methanol | To a solution of 4-bromo-3-methoxy-benzoic acid methyl ester (6.875 mmol, 1.676 mL) in a mixture 1:1 of THF/MeOH (15 ML), lithium hydroxide (7.553 mmol, 0.180 g) was added, and the reaction was stirred at RT overnight before distillation of volatiles. The residue was diluted with water, acidified with a solution of HCl (1N), and stirred for 1 hour. The formed precipitate was filtered off, and washed with water and petroleum ether to give 4-bromo-3-methoxy-benzoic acid. Yield: 56percent. |
10.1 g | With water; lithium hydroxide In tetrahydrofuran; methanol at 20℃; for 1 h; | To a stirred solution of methyl 4-bromo-3-methoxybenzoate (11.2 g) in THF (130 mL), methanol (45 mL) and water (45 mL) was added a 1 M solution of lithium hydroxide in water (140 mL). The mixture was stirred at room temperature for 1 h. The solvent was removed in vacuum. Water was added and 1 N hydrochloric acid was added with ice bath cooling until pH 4 was reached. The precipitated solid was collected by filtration, washed with water and dried in vacuum to give 10.1 g of the title compound, that was used without further purification. 1H-NMR (300MHz, DMSO-d6): δ [ppm] = 3.87 (s, 3H), 7.42 (dd, 1 H), 7.50 (d, 1 H), 7.68 (d, 1 H), 13.21 (br. s., 1 H). |
10.1 g | With lithium hydroxide In tetrahydrofuran; methanol; water at 20℃; for 1 h; | To a stirred solution of methyl 4-bromo-3-methoxybenzoate (11.2 g) in THF (130 mL), methanol (45 mL) and water (45 mL) was added a 1 M solution of lithium hydroxide in water (140 mL). The mixture was stirred at room temperature for 1 h. The solvent was removed in vacuum. Water was added and I N hydrochloric acid was added with ice bath cooling until pH 4 was reached. The precipitated solid was collected by filtration, washed with waterand dried in vacuum to give 10.1 g of the title compound, that was used without further purification.1H-NMR (300MHz, DMSO-d6): a [ppm] = 3.87 (5, 3H), 7.42 (dd, 1H), 7.50 (d, 1H),7.68 (d, 1H), 13.21 (br. s., 1H). |
10.1 g | With water; lithium hydroxide In tetrahydrofuran; methanol at 20℃; for 1 h; | To a stirred solution of methyl 4-bromo-3-methoxybenzoate (11.2 g) in THF (130 mL), methanol (45 mL) and water (45 mL) was added a 1 M solution of lithium hydroxide in water (140 mL). The mixture was stirred at room temperature for 1 h. The solvent was removed in vacuum. Water was added and 1 N hydrochloric acid was added with ice bath cooling until pH 4 was reached. The precipitated solid was collected by filtration, washed with water and dried in vacuum to give 10.1 g of the title compound, that was used without further purification. 1H-NMR (300 MHz, DMSO-d6): δ [ppm]=3.87 (s, 3H), 7.42 (dd, 1H), 7.50 (d, 1H), 7.68 (d, 1H), 13.21 (br. s., 1H). |
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