Structure of 4-Methoxy-2-methylbenzoic acid
CAS No.: 6245-57-4
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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CAS No. : | 6245-57-4 |
Formula : | C9H10O3 |
M.W : | 166.17 |
SMILES Code : | O=C(O)C1=CC=C(OC)C=C1C |
MDL No. : | MFCD00020291 |
Boiling Point : | No data available |
InChI Key : | MSVRGYOYISBGTH-UHFFFAOYSA-N |
Pubchem ID : | 597216 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 12 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.22 |
Num. rotatable bonds | 2 |
Num. H-bond acceptors | 3.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 44.86 |
TPSA ? Topological Polar Surface Area: Calculated from |
46.53 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.64 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
1.79 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.7 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.64 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
1.68 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.69 |
Log S (ESOL):? ESOL: Topological method implemented from |
-2.24 |
Solubility | 0.965 mg/ml ; 0.00581 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-2.39 |
Solubility | 0.684 mg/ml ; 0.00411 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.28 |
Solubility | 0.876 mg/ml ; 0.00527 mol/l |
Class? Solubility class: Log S scale |
Soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
Yes |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
No |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-6.04 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.56 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
0.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.13 |
* 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 |
---|---|---|
100% | With thionyl chloride; at 20℃;Reflux; | To a stirred mixture of 4-methoxy-2-methyl benzoic acid (1.0 g, 6 mmol) and methanol (50 mL) was added thionyl chloride (1.3 mL, 17.8 mmol), dropwise, at room temperature under a nitrogen atmosphere. The reaction mixture was heated at reflux for 3 h. The reaction mixture was allowed to cool at room temperature and concentrated to give a pale yellow liquid. The crude product was purified by flash chromatography over silica with hexanes:ethyl acetate (9:1) to give 1.11 g (100%) of methyl 2-methyl-4-(methyloxy)benzoate as a colorless liquid. 1H NMR (400 MHz, DMSO-J6): delta 7.81 (d, J = 9 Hz, IH), 6.86 (d, J = 3 Hz, IH), 6.83 (dd, J = 9, 3 Hz, IH), 3.78 (s, 3H), 3.75 (s, 3H), 2.49 (s, 3H). ES-LCMS m/z 181(M + H)+. |
98% | sulfuric acid; In water; for 48h;Heating / reflux; | According to J. Org. Chem. 33: 494 (1968), a mixture of 4-methoxy-2-methylbenzoic acid (20 g, 120 mmol) and [MEOH] (97 mL) containing sulfuric acid [(CONC.,] 0.6 mL) was heated under reflux 48 h. After cooling the mixture was evaporated and the residue diluted with diethyl ether and washed with a saturated sodium hydrogen carbonate solution and brine. The organic phase was then separated and dried over sodium sulphate. After evaporation the residue was distilled through a 8 cm Vigreux column to afford the title compound (21.2 g, 98%) as a colourless liquid. Bp 60 [C/1] mbar. MS: m/e = 180.3 (M+). |
94% | With sulfuric acid; In water; at 65℃; for 18h; | 4-Methoxy-2-methyl-benzoic acid methyl esterA solution of 4-Methoxy-2-methyl-benzoic acid (15 g, 90 mmol) in methanol {200 mL) was heated to 65 0C. Sulfuric acid (8.9 g, 90 mmol) was added and the mixture was stirred for 18 h at 65 C. The reaction was cooled and concentrated and the residual oil was dissolved in ethyl acetate and washed with water, brine, and absorbed onto silica to perform chromatography (10 % ethyl acetate/hexanes) to yield 4-Methoxy-2-methyl-benzoic acid methyl ester as an oil, (15.3 g, 94 %). MS: ES M+1: 181.0 (180.1). |
84% | With sulfuric acid; for 24h;Reflux; | Benzoic acid (1 equiv) was dissolved in MeOH (1.66 mL per mmol) and H2SO4 (0.07 mL per mmol). The solution was refluxed for 7-24 h before being cooled to rt and concentrated in vacuo. The resulting mixture was dissolved in EtOAc. The organics were washed with an aqueous solution of NaOH (10 %), combined, dried over MgSO4 and concentrated in vacuo to afford the desired ester. |
81% | With thionyl chloride; for 3h;Heating / reflux; | Preparation 67 4-Methoxy-2-methyl-benzoic acid methyl esterTo an ambient temperature suspension of 4-Methoxy-2-methyl-benzoic acid (1.0 g, 6.02 mmol) in MeOH (10 mL) is added thionyl chloride (1.10 mL, 15.04 mmol) dropwise. The reaction mixture is heated to reflux. After 3h, the reaction is concentrated and the residue is partitioned between EtOAc and NaHCO3. The aqueous layer is extracted with EtOAc and the combined organic layers are washed with brine, dried (MgSO4), filtered, and concentrated to yield the title compound (877 mg, 81%) 1H NMR (400 MHz, CDCl3) delta 7.95-7.91 (m, IH), 6.77-6.72 (m, 2H), 3.86 (s, 3H), 3.84 (s, 3H). |
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