Structure of 78775-11-8
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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. : | 78775-11-8 |
Formula : | C8H7BrO |
M.W : | 199.04 |
SMILES Code : | BrC1=C(C=C(C=O)C=C1)C |
MDL No. : | MFCD07787170 |
Boiling Point : | No data available |
InChI Key : | YBXGUHGVNUFFJU-UHFFFAOYSA-N |
Pubchem ID : | 10921521 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H332-H335 |
Precautionary Statements: | P261-P280-P305+P351+P338 |
Num. heavy atoms | 10 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.12 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 1.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 44.5 |
TPSA ? Topological Polar Surface Area: Calculated from |
17.07 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.92 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.67 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
2.57 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
2.52 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
3.12 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
2.56 |
Log S (ESOL):? ESOL: Topological method implemented from |
-3.13 |
Solubility | 0.146 mg/ml ; 0.000734 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-2.68 |
Solubility | 0.416 mg/ml ; 0.00209 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-3.59 |
Solubility | 0.0512 mg/ml ; 0.000257 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 |
-5.62 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 |
2.0 |
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) |
1.09 |
* 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 |
---|---|---|
Preparation of Intermediate 4-Bromo-3-methyl-benzaldehvde (l-2a):The starting material (4-bromo-3-methyl-benzonitrile, 12.8g, 65.3 mmol) was dissolved in toluene (120 ml_) and dichloromethane (20 mL) and cooled to -600C as a 1.5M diisobutylaluminum hydride in toluene (67 mL, 100 mmol) was added dropwise over 30 minutes keeping the temperature between -60 and -500C. The reaction was allowed to warm slowly to room temperature and stirred for an additional 3 hours. The reaction was quenched by adding ethyl acetate and stirring for 20 minutes before the addition of 1 N aqueous hydrochloric acid at 0°C. The reaction mixture was then allowed to warm slowly to room temperature before extractive workup in the usual manner using ethyl acetate (2 times). The combined organic layers were washed with brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on silica eluting with 5percent ethyl acetate in heptane to yield 5.6 g of the title compound (l-2a).1H NMR (CDCI3): delta 2.47 (s, 3H), 7.54 (dd, 1 H), 7.69-7.72 (m, 2H), 9.94 (s, 1H) | ||
Example II: Preparation of 4-bromo-3-methyl-benzaldehvde; A solution of 4-bromo-3-methyl-benzonitrile (500 mg) in dichloromethane was added at 0°C to a solution of diisobutylaluminium hydride ("DIBAL-H") in hexanes (IM) (2.6 ml). The reaction mixture was stirred at 0°C for 2 hours. The reaction mixture was poured on a mixture of ice (10 g) and aqueous hydrobromic acid (6M) (10 ml). The mixture was allowed to warm to ambient temperature and then extracted twice with dichloromethane. The combined organic phases were washed with water, dried over sodium sulfate, and concentrated to give 4-bromo-3-methyl-benzaldehyde (0.419 g) as a colorless oil. 1H-NMR (400 MHz, CDCl3): 9.95 (s, IH), 7.72 (m, 2H), 7.55 (d, IH), 2.50 (s, 3H) ppm. | ||
Example Il : Preparation of 4-bromo-3-methyl-benzaldehyde; A solution of 4-bromo-3-methyl-benzonitrile (commercially available) (500 mg) in dichloromethane was added at 0°C to a solution of diisobutylaluminium hydride ("DIBAL- H") (2.6.ml) in hexanes (IM). The mixture was stirred at 0°C for 2 hours. The reaction mixture was poured on a mixture of ice (10 g) and aqueous hydrobromic acid (6M) (10 ml). The mixture was allowed to warm to ambient temperature and then extracted twice with dichloromethane. The combined organic phases were washed with water, dried over sodium sulfate, and concentrated to give 4-bromo-3-methyl-benzaldehyde (0.419 g) as a colorless oil. 1H-NMR (400 MHz, CDCl3): 9.95 (s, IH), 7.72 (m, 2H), 7.55 (d, IH), 2.50 (s, 3H) ppm. |
A solution of 4-bromo-3-methyl-benzonitrile (commercially available) (500 mg) in dichloromethane (7.5 ml) was added at 00C to a solution of diisobutylaluminium hydride ("DIBAL-H") (2.6. ml) in hexanes (IM). The reaction mixture was stirred at 00C for 2 hours. The reaction mixture was poured on a mixture of ice (10 g) and aqueous hydrobromic acid (6M) (10 ml). The mixture was allowed to warm to ambient temperature and then extracted twice with dichloromethane. The combined organic phases were washed with water, dried over sodium sulfate, and concentrated to give 4-bromo-3-methyl-benzaldehyde (0.419 g) as a colorless oil. 1H-NMR (400 MHz, CDCl3): 9.95 (s, IH), 7.72 (m, 2H), 7.55 (d, IH), 2.50 (s, 3H) ppm. | ||
With diisobutylaluminium hydride; In hexane; at -40 - 20℃; for 1.5h; | To a solution of 4-bromo-3-methylbenzonitrile (0.975 g; 5.00 mmol) in anhyd CH2Cl2(7.5 mL) at ?40° C. was added DIBAL-H (7.5 mL of a 1M solution in hexanes; 7.5 mmol), dropwise over 5 min. The mixture was stirred 30 min at ?40° C., removed from the cooling bath and stirred 1 h at rt. The mixture was cooled in an ice bath, and excess hydride was quenched by dropwise addition of MeOH. After stirring 20 min, Rochelle's salt (satd aq. solution) was added, the mixture was stirred at rt overnight, and the layers were separated. The aqueous layer was extracted with CH2Cl2(×2), combined organics were washed (H2O, brine), dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography (EtOAc/hexanes), affording the title compound as a colorless solid (Note 1). Note 1 The title compound was oxidized rapidly on standing in air to a mixture of benzaldehyde and benzoic acid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | With manganese(IV) oxide; In dichloromethane; at 20℃; for 12h; | Step 3: Preparation of 4-bromo-3-methylbenzaldehyde To a solution of (4-bromo-3-methylphenyl)methanol (420 mg, 2.09 mmol) in DCM (6 mL) at rt was added MnO2 (1.82 g, 20.9 mmol). The reaction mixture was stirred for 12 h, filtered and concentrated under reduced pressure to give 4-bromo-3-methyl-benzaldehyde (372 mg; yield 89percent) as an oil. |
With manganese(IV) oxide; In dichloromethane; at 20℃; for 12h; | 3.7 g (43 mmol, 10 eq) of manganese dioxide are added to a solution of 900 mg (4.3 mmol, 1 eq) of (4-bromo-3-methylphenyl)methanol in 8 mL of dichloromethane. The reaction mixture is stirred for 12 hours at room temperature. The solid is filtered off and the solvent is evaporated off. 900 mg of 4-bromo-3-methylbenzaldehyde are obtained in oil form and used in the following reaction without further purification |