Structure of 4-Bromo-3-methoxybenzaldehyde
CAS No.: 43192-34-3
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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. : | 43192-34-3 |
| Formula : | C8H7BrO2 |
| M.W : | 215.04 |
| SMILES Code : | COC1=C(Br)C=CC(C=O)=C1 |
| MDL No. : | MFCD11846303 |
| InChI Key : | HKLCOMKRVBQSHA-UHFFFAOYSA-N |
| Pubchem ID : | 12187207 |
| GHS Pictogram: |
|
| Signal Word: | Warning |
| Hazard Statements: | H302-H315-H319-H332-H335 |
| Precautionary Statements: | P280-P305+P351+P338-P310 |
| Num. heavy atoms | 11 |
| Num. arom. heavy atoms | 6 |
| Fraction Csp3 | 0.12 |
| Num. rotatable bonds | 2 |
| Num. H-bond acceptors | 2.0 |
| Num. H-bond donors | 0.0 |
| Molar Refractivity | 46.02 |
| TPSA ? Topological Polar Surface Area: Calculated from |
26.3 Ų |
| Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.96 |
| Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.26 |
| Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
2.27 |
| Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.86 |
| Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.65 |
| Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
2.2 |
| Log S (ESOL):? ESOL: Topological method implemented from |
-2.87 |
| Solubility | 0.291 mg/ml ; 0.00135 mol/l |
| Class? Solubility class: Log S scale |
Soluble |
| Log S (Ali)? Ali: Topological method implemented from |
-2.45 |
| Solubility | 0.765 mg/ml ; 0.00356 mol/l |
| Class? Solubility class: Log S scale |
Soluble |
| Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-3.33 |
| Solubility | 0.0999 mg/ml ; 0.000465 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) |
Yes |
| 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 |
-6.01 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 |
0.0 |
| Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
| PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
| Brenk? Structural Alert: implemented from |
1.0 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) |
1.22 |
* 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.

[ 43192-34-3 ]
[ 43192-34-3 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| With ammonium acetate; In acetic acid; at 80℃; for 18h; | A mixture of the product of example 82c (27.4 g), ammonium acetate (10.8 g) and nitromethane (35 ml) in acetic acid (125 ml) was stirred at 8O 0C for 18 h. The reaction mixture was cooled to room temperature and poured into water (1 1). The solids were collected by filtration and dissolved in dichloromethane (2 1). The organic layer was washed with brine, dried (MgSO4), filtered and concentrated in vacuo.Yield: 29.8 g. |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 66% | With n-Butyl nitrite; copper(I) bromide; In acetonitrile; at 20℃; for 12h; | 3C. 4-Bromo-3-methoxy-benzaldehydeA mixture of 4-amino-3-methoxy-benzaldehyde (4.5 g, 29.8 mmol), n-butyl nitrite (4.6 g, 35.8 mmol) and copper bromide (6.83 g, 47.7 mmol) in MeCN (45 mL) was stirred atroom temperature for 12 hours. The reaction mixture was diluted with EtOAc (100 mL), washed with water (200 mL), dried (Na2SO4) and evaporated under reduced pressure to leave a residue which was purified by column chromatography on neutral silica gel (60-120 mesh) using 0-70percent EtOAc/hexanes as the eluentto give the title compound (4.2 g, 66percent). |
| With n-Butyl nitrite; copper(I) bromide; In acetonitrile; at 20℃; | A solution of the product of example 82b (38.3 g) in acetonitrile (600 ml) was added dropwise to a mixture of n-butyl nitrite (43.1 ml) and copper(I) bromide (63.6 g) in acetonitrile (1300 ml). After stirring for 18 h at room temperature, the reaction mixture <n="102"/>was diluted with ethyl acetate and washed with an aqueous HCl solution (1 N). The organic layer was separated and washed with brine, dried (MgSO4), filtered and concentrated in vacuo. The residue was purified by chromatography on silica gel in heptane/ethyl acetate [1 :1 (v/v)]. Yield: 27.4 g. LC/MS-ESI: [M+H]+ = 215.1 / 217.0. | |
| With n-Butyl nitrite; copper(I) bromide; In nitriobenzene; acetonitrile; at 20℃; for 18h; | A solution of the product of example Ib (38.3 g) in acetonitrile (600 ml) was added drop wise to a mixture of n-butyl nitrite (43.1 ml) and copper(I) bromide (63.6 g) in acetonitrile (1.3 1). After stirring for 18 h at room temperature, the reaction mixture was diluted with ethyl acetate and washed with an aqueous HCl solution (1 N). The organic layer was separated and washed with brine, dried (MgSO4), filtered and concentrated in vacuo. The residue was purified by chromatography on silica gel in heptane/ethyl acetate [1 :1 (v/v)].Yield: 27.4 g. LC/MS-ESI: [M+H]+ = 215.1 / 217.0; 1H-NMR (CDCl3): delta 3.98 (s, 3H, OMe), 7.32, 7.4, 7.75 (m, 3H, ArH), 9.95 (s, IH, CHO). |
| With n-Butyl nitrite; copper(I) bromide; In acetonitrile; at 20℃; for 18h; | (c). 4-Bromo-3-methoxy-benzaldehyde A solution of the product of example 1b (38.3 g) in acetonitrile (600 ml) was added drop wise to a mixture of n-butyl nitrite (43.1 ml) and copper(I) bromide (63.6 g) in acetonitrile (1.3 l). After stirring for 18 h at room temperature, the reaction mixture was diluted with ethyl acetate and washed with an aqueous HCl solution (1 N). The organic layer was separated and washed with brine, dried (MgSO4), filtered and concentrated in vacuo. The residue was purified by chromatography on silica gel in heptane/ethyl acetate [1:1 (v/v)]. Yield: 27.4 g. LC/MS-ESI: [M+H]+=215.1/217.0; 1H-NMR (CDCl3): delta 3.98 (s, 3H, OMe), 7.32, 7.4, 7.75 (m, 3H, ArH), 9.95 (s, 1H, CHO). | |
| 27.4 g | With n-Butyl nitrite; copper(I) bromide; In acetonitrile; at 20℃; for 18h; | (c) . 4-Bromo-3-methoxy-benzaldehyde A solution of the product of example 42b (38.3 g) in acetonitrile (600 ml) was added dropwise to a mixture of n-butyl nitrite (43.1 ml) and copper(l) bromide (63.6 g) in acetonitrile (1300 ml). After stirring for 18 h at room temperature, the reaction mixture was diluted with ethyl acetate and washed with an aqueous 1 M HCI solution. The organic layer was separated and washed with brine, dried (MgS04), filtered and concentrated in vacuo. The residue was purified by chromatography on silica gel in heptane/ethyl acetate [1 :1 (v/v)]. Yield: 27.4 g. MS (ESI) m/z: 215,217 (M+H)+. |

| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 40% | With ammonium acetate; acetic acid; at 80℃; for 12h; | 4A. 1 -Bromo-2-methoxy-4-((E)-2-nitro-vinyl)-benzeneA stirred solution of <strong>[43192-34-3]4-bromo-3-methoxy-benzaldehyde</strong> (5.0 g, 23.3 mmol), ammoniumacetate (2.4 g, 30.2 mmol) and nitromethane (6.3 mL, 116 mmol) in glacial acetic acid(20 mL) was heated to 80°C for 12 hours. The mixture was allowed to cool to roomtemperature then poured into water (100 mL). The resulting solid was collected byfiltration and then dissolved in DCM (80 mL). The solution was washed with brine (20 mL), dried (Na2SO4) and evaporated under reduced pressure to leave a residue which was purified by column chromatography on neutral silica gel using DCM as the eluent to give the title compound (4.2 g, 40percent). |
| With ammonium acetate; In acetic acid; at 80℃; for 18h; | A mixture of the product of example Ic (27.4 g), ammonium acetate (10.8 g) and nitromethane (35 ml) in acetic acid (125 ml) was stirred at 8O 0C for 18 h. The reaction mixture was cooled to room temperature and poured into water (1 1). The solids were collected by filtration and dissolved in dichloromethane (2 1). The organic layer was washed with brine, dried (MgSO4), filtered and concentrated in vacuo.Yield: 29.8 g 1H-NMR (CDCl3): delta 3.95 (s, 3H, OCH3), 7.0-7.95 (m, 5H, ArH + CH=CH). | |
| With ammonium acetate; acetic acid; at 80℃; for 18h; | (d). 1-Bromo-2-methoxy-4-((E)-2-nitro-vinyl)-benzene A mixture of the product of example 1c (27.4 g), ammonium acetate (10.8 g) and nitromethane (35 ml) in acetic acid (125 ml) was stirred at 80° C. for 18 h. The reaction mixture was cooled to room temperature and poured into water (1 l). The solids were collected by filtration and dissolved in dichloromethane (2 l). The organic layer was washed with brine, dried (MgSO4), filtered and concentrated in vacuo. Yield: 29.8 g. 1H-NMR (CDCl3): delta 3.95 (s, 3H, OCH3), 7.0-7.95 (m, 5H, ArH+CH=CH). |
| 29.8 g | With ammonium acetate; acetic acid; at 80℃; for 18h; | (d) . 1 -Bromo-2-methoxy-4-((E)-2-nitro-vinyl)-benzene A mixture of the product of example 42c (27.4 g), ammonium acetate (10.8 g) and nitromethane (35 ml) in acetic acid (125 ml) was stirred at 80 °C for 18 h. The reaction mixture was cooled to room temperature and poured into water. The solids were collected by filtration and dissolved in dichloromethane. The organic layer was washed with brine, dried (MgS04), filtered and concentrated in vacuo. Yield: 29.8 g. |

| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 5% | General synthesis of curcumin analogues 25-34 from corresponding benzaldehyde precursors was carried out by modified literature methods (Scheme 5). The appropriate vanillin derivative (1 equiv) and boric anhydride (0.6 equiv), dissolved in anhydrous DMF in a flask which was thoroughly flushed with nitrogen before use, were stirred at room temperature. Under nitrogen, 2,4-pentanedione (0.6 equiv) and 2,2-dimethoxypropane (1 equiv) or tributyl borate (2 equiv) were added dropwise. The mixture was stirred and heated to a temperature of 70 °C under nitrogen. About 30 min later, n-butylamine (0.2 equiv) was added dropwise slowly under nitrogen, and the mixture was allowed to stir at 70 °C for 2-4 h. At the end of the reaction, the mixture was hydrolyzed by adding hot (70 °C) aqueous 5percent acetic acid and stirred until it cooled down. The mother liquor was extracted three times with EtOAc, and the combined organic layers were washed three times, dried over anhydrous Na2SO4, and filtered. After removal of the solvent under reduced pressure, the residue was purified by silica gel column chromatography. |
[ 43192-34-3 ]

| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 41% | With sodium hydroxide; In ethanol; at 20℃; | General procedure: 2.49 mL of 10percent NaOH solution was added dropwise to a solution of 8 (429 mg, 1.93 mmol) and 3-bromo-4-methoxybenzaldehyde (622 mg, 3.57 mmol) in EtOH (40 mL). The mixture was stirred at room temperature overnight and was then neutralized with 1N hydrochloric acid to pH = 7. After EtOH was removed by evaporation, CH2Cl2 was added and the organic layer was separated. The aqueous phase was extracted twice with CH2Cl2. The combined organic layers were filtered using a Biotage ISOLUTE.(R). phase separator, and concentrated to afford a mixture of unreacted 3-bromo-4-methoxybenzaldehyde and product, which was purified by flash column chromatography (hexanes/ethyl acetate = 94/6 to remove unreacted aldehyde and then hexanes/ethyl acetate = 80/20) to give the product as a light yellow powder (512 mg, yield: 64percent). |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| With ammonium acetate; acetic acid; In ethanol; chloroform; water; | (i)Synthesis of 2,4,6-tris(3-methoxy-4-bromophenyl)pyridine (d-1)To a round-bottom flask, 4.37 g (20.3 mmol) of <strong>[43192-34-3]3-methoxy-4-bromobenzaldehyde</strong>, 9.30 g (40.6 mmol) of 3-methoxy-4-bromoacetophenone, 30.9 g (406 mmol) of ammonium acetate and 40 ml of acetic acid were introduced and stirred at 150° C. for 4 hours and then cooled to room temperature.Thereafter, 50 ml of water was added to the mixture and stirred for 1 hour.The mixture was filtered off and the resulting yellow solid was dissolved in chloroform.After the solvent was distilled off under reduced pressure, an oily substance was prepared.To the oily substance, 40 ml of ethanol was added and stirred for 30 min while refluxing.The temperature of the mixture was returned to room temperature and the mixture was filtered off to prepare a white solid.This white solid was identified as 2,4,6-tris-(3-methoxy-4-bromophenyl)pyridine by 1H-NMR and mass spectrometry.The amount (yield) was 3.65 g (18percent). |

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