Structure of 1836-05-1
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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. : | 1836-05-1 |
Formula : | C8H7BrO2 |
M.W : | 215.04 |
SMILES Code : | CC(C1=CC=CC(Br)=C1O)=O |
MDL No. : | MFCD08236725 |
InChI Key : | XPYYOCANFXTCKX-UHFFFAOYSA-N |
Pubchem ID : | 10954930 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H332-H335 |
Precautionary Statements: | P261-P280-P305+P351+P338 |
Num. heavy atoms | 11 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.12 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 46.36 |
TPSA ? Topological Polar Surface Area: Calculated from |
37.3 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.94 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.49 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
2.36 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.86 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.35 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
2.2 |
Log S (ESOL):? ESOL: Topological method implemented from |
-3.08 |
Solubility | 0.179 mg/ml ; 0.000833 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-2.92 |
Solubility | 0.26 mg/ml ; 0.00121 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-3.02 |
Solubility | 0.207 mg/ml ; 0.000962 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 |
-5.84 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 |
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) |
1.33 |
* 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 |
---|---|---|
62% | With aluminum (III) chloride; In 1,2-dichloro-benzene; at 140℃; for 3h; | To a solution of commercially available 2-bromophenol (10; 10.0 g,57.8 mmol) in anhydrous CH2Cl2 (50 mL) in a round-bottom flask were added AcCl (5.0 g, 63.6 mmol) and Et3N (4.67 mL, 63.6 mmol) and the mixture was stirred at r.t. for 1 h. The solvent was evaporated under reduced pressure to give the pure 2?-bromophenylacetate (9; 12.18 g, 56.6 mmol, 98percent). The ester 9 was dissolved in 1,2-dichlorobenzene (100 mL), then AlCl3 (11.3 g, 84.9 mmol) was added. The mixture was heated and stirred at 140 °C for 3 h. Ice and 10percent HCl were added till the solution was slightly acidic (pH). The organic phase was separated and the aqueous phase was extracted with CH2Cl2 (3 × 50 mL). The combined organic phases were dried (MgSO4) and filtered. The CH2Cl2 was evaporated under vacuum. The crude residue was treated with hexane (300 mL) and cooled at ?20 °C when most of the para-substituted by-product 11 crystallized and filtered off. The solution was filtered through silica gel and washed with hexanetill the 1,2-dichlorobenzene was eluted, then the eluent was changed to CH2Cl2?Et3N (20:1). After chromatography and evaporation of the eluent, the pure product 8 was isolated as a colorless oil; yield: 7.55 g (35.1 mmol, 62percent). IR (ATR): 3008, 2925, 2570, 1643, 1473, 1428, 1364, 1250, 1146, 1071, 968, 836, 775, 738, 627, 595, 523, 437 cm?1. 1H NMR (CDCl3): delta = 12.97 (s, 1 H, OH), 7.73 (m, 2 H, 4-H, 6-H), 6.82 (t,J = 7.9 Hz, 1 H, 5-H), 2.66 (s, 3 H, CH3). 13C NMR (CDCl3): delta = 204.3 (C=O), 158.9 (C-2), 139.6 (C-4), 129.9 (C-6), 120.5 (C-1), 119.6 (C-5), 112.0 (C-3), 26.7 (CH3). MS: m/z = 214 [M+], 216 [M+ + 2, 100percent], 201, 199, 143, 145, 92, 77, 63. Anal. Calcd for C8H7BrO2: C, 44.68; H, 3.28. Found: C, 44.50; H, 3.19. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
25% | With N-Bromosuccinimide; diisopropylamine; In carbon disulfide; at 0 - 20℃; | N-Bromosuccinimide (5.25 g, 29.5 mmol) was added at 0° C. to a mixture of 1-(2-hydroxyphenyl)ethanone (4.00 g, 29.5 mmol) and diisopropylamine (0.42 mL, 2.95 mmol) in carbon disulfide (50 mL), and the mixture was stirred for 1 hour at room temperature. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated sodium bicarbonate aqueous solution and water, then dried over magnesium sulfate, filtered, and concentrated at reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate-hexane 0:10-->2:8) to give 1.60 g of the titled compound (yield 25percent). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
25% | Lastly, the Sandemeyer reaction was carried out to obtain the desired bromo derivative Va in 25percent yield. | |
25% | With cis-nitrous acid; copper(I) bromide; | 1. Para-anisidine was acylated at the amino center with acetic anhydride in dichloromethane and the product was obtained in 91 percent yield. Then, Friedel Craft's acyla- tion was carried out to get the hydroxyl acetophenone with acetyl chloride in the presence of anhydrous aluminium chloride in dichloromethane to give the product in 70percent yield. Nitration of acetanilide derivative was carried out with nitric acid in aqueous acetic acid to get the product in 45percent yield. Acetyl group of acetamido functionality was removed by refluxing in dilute hydrochloric acid for 2.5 h to get the aniline derivative in quantitative yield. Deamination was done by diazotization and treating the diazonium salt with ethanol to get the 3-nitro-2-hydroxyacetophenone. The nitro group was reduced by heating the reaction mixture in ethyl acetate with tin in hydrochloric acid resulting in the formation of corresponding amino compound. Lastly, Sandemeyer reaction was carried out to get the desired bromo derivative Va in 25percent yield. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
26%; 61% | With Oxone; ammonium bromide; In methanol; at 20℃; for 4.5h; | General procedure: Oxone (1.352 g, 2.2 mmol) was added to the well stirred solution of substrate (2 mmol) and NH4Br (0.215 g, 2.2 mmol) in methanol (10 ml) and the reaction mixture was allowed to stir at room temperature (or reflux temperature). After completion of the reaction, as monitored by TLC, the reaction mixture was quenched with aqueous sodium thiosulfate, and extracted with ethyl acetate (3×25 ml). Finally, the combined organic layer was washed with water, dried over anhydrous sodium sulfate, filtered and removal of solvent in vacuo yielded a crude residue, which was further purified by column chromatography over silica gel (finer than 200 mesh) to afford pure products. All the products were identified on the basis of 1H NMR and mass spectral data. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
52%Chromat.; 6%Chromat.; 19%Chromat. | With N-Bromosuccinimide; In acetonitrile; at 20℃; for 2h; | General procedure: Reaction conditions: Thiourea (5.1 molpercent, 2 mg, 0.026 mmol) was added to an acetonitrile solution (10 mL) containing NBS (1.15 equiv, 104.4 mg, 0.587 mmol). Anisole (56.3 mg, 0.51 mmol) was added immediately to the resulting stirred solution and allowed to stir at room temperature for 10 min. The reaction was quenched by the addition of 10percent aqueous solution of Na2S2O3 (10 mL) and extracted with ethyl acetate (70 mL). The organic solution was then washed with additional 10percent Na2S2O3 (2 * 10 mL), followed by deionized water (3 * 15 mL) and brine (2 * 10 mL). The organic solution was then dried over anhydrous Na2SO4 and the solvent was evaporated in vacuo. The major product of each reaction was isolated by centrifugal thin-layer chromatography using a 2 mm thick silica gel 60GF254 coated plate (5percent CH2Cl2/hexanes). The products reported herein are known compounds and were characterised by GC-MS, IR, 1H and 13C NMR. Their spectroscopic data are in agreement with those reported in the literature. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77% | With pyrrolidine; In methanol; at 20℃; for 24h; | General procedure: 4.1.1. General procedure for the synthesis of 4-oxo-3,4-dihydrospiro[chromene-2,4'-piperidines] 5a?f. A solution of appropriate 2'-hydroxyacetophone derivative 3 (100 mmol), N-tert-butoxycarbonyl-4-piperidone 4 (19.92 g, 100 mmol) and pyrrolidine (8.21 mL, 100 mmol) in methanol (150 mL) was stirred at room temperature for 18?24h. Upon completion of the reaction (monitored by TLC), the mixture was concentrated under vacuum and the brown residue thus obtained was partitioned between EtOAc (500 mL) and 1N hydrochloric acid (500 mL). The layers were separated. The aqueous layer was extracted with EtOAc (2×250 mL). The combined organic extracts were successively washed with water (2×250 mL), saturated NaHCO3 solution (250 mL) and brine (200 mL). The residue obtained after evaporation of the solvent was purified by flash silica gel column chromatography using 20?30percent EtOAc in petroleum ether (PE) as eluent. |
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