Structure of 1081-04-5
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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. : | 1081-04-5 |
Formula : | C10H9BrN2O2 |
M.W : | 269.10 |
SMILES Code : | O=C(C1=NNC2=C1C=C(Br)C=C2)OCC |
MDL No. : | MFCD05663980 |
InChI Key : | DKVWLGFTRAWGAD-UHFFFAOYSA-N |
Pubchem ID : | 12689364 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 15 |
Num. arom. heavy atoms | 9 |
Fraction Csp3 | 0.2 |
Num. rotatable bonds | 3 |
Num. H-bond acceptors | 3.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 59.88 |
TPSA ? Topological Polar Surface Area: Calculated from |
54.98 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.8 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.8 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
2.5 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
2.04 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.85 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
2.4 |
Log S (ESOL):? ESOL: Topological method implemented from |
-3.52 |
Solubility | 0.0816 mg/ml ; 0.000303 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-3.61 |
Solubility | 0.0659 mg/ml ; 0.000245 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-4.25 |
Solubility | 0.0153 mg/ml ; 0.0000569 mol/l |
Class? Solubility class: Log S scale |
Moderately 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 |
-5.95 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<0.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.99 |
* 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 |
---|---|---|
64.5% | With sulfuric acid; for 4.0h;Reflux; Inert atmosphere; | General procedure: Concentrated sulfuric acid (1 mL) was added to a suspension of 5- bromo-lH-indazole-3-carboxylic acid (CXV) (1.30 g, 5.39 mmol) in dry MeOH (50 mL) and heated to reflux for 4 h under argon. The solution was cooled to room temperature and the MeOH was evaporated under vacuum. The residue was dissolved in EtOAc and washed with water. The organic phase was dried over Na2S04, filtered and concentrated to afford methyl 5-bromo-lH-indazole-3-carboxylate (CXVI) as a white solid (1.35 g, 5.29 mmol, 98% yield). 1H NMR (DMSO-d6) delta ppm 14.13 (s, 1H), 8.21 (d, J = 1.6 Hz, 1H), 7.67 (d, J= 7.2 Hz, 1H), 7.59 (dd, J= 7.2, 1.2 Hz, 1H), 3.92 (s, 3H); ESIMS found for C9H7BrN202 mlz 256.0 (M+H). |
64.5% | With sulfuric acid; for 4.0h;Inert atmosphere; Reflux; | General procedure: Concentrated sulfuric acid (1 mL) was added to a suspension of 5-bromo- lH-indazole-3-carboxylic acid (CXV) (1.30 g, 5.39 mmol) in dry MeOH (50 mL) and heated to reflux for 4 h under argon. The solution was cooled to room temperature and the MeOH was evaporated under vacuum. The residue was dissolved in EtOAc and washed with water. The organic phase was dried over Na2SO/t, filtered and concentrated to afford methyl 5-bromo-lH- indazole-3-carboxylate (CXVI) as a white solid (1.35 g, 5.29 mmol, 98% yield). NMR (DMSO-d6) delta ppm 14.13 (s, 1H), 8.21 (d, J= 1.6 Hz, 1H), 7.67 (d, J= 7.2 Hz, 1H), 7.59 (dd, J = 7.2, 1.2 Hz, 1H), 3.92 (s, 3H); ESIMS found for CgHvBrNaOa mlz 256.0 (M+H) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With diisobutylaluminium hydride; In tetrahydrofuran; toluene; at -78 - 0℃; for 3.3h; | Step 1 <strong>[1081-04-5]Ethyl 5-bromo-1H-indazole-3-carboxylate</strong> (16.44 g, 61.09 mmol) prepared according to a known method [J. Am. Chem. Soc., volume 74, page 2009 (1952)] was dissolved in tetrahydrofuran (610 mL), a toluene solution of 1.0 mol/L diisobutyl aluminum hydride (305 mL, 305 mmol) was added over 20 minutes period under nitrogen stream at -78 C and temperature thereof was gradually raised up to 0 C while stirring, followed by further stirring for 3 hours. To the reaction solution was added sodium sulfate decahydrate (98.23 g, 304.9 mmol). This was stirred for one night, the mixture was dried over anhydrous sodium sulfate and filtered through Celite, and the filtrate was concentrated in vacuo to give 5-bromo-3-hydroxymethyl-1H-indazole (13.81 g, quantitatively).Rf = 0.5 (chloroform/methanol = 9/1) 1H-NMR (270 MHz, DMSO-d6)delta; 5.04 (d, J = 5.9 Hz, 2H), 5.76 (t, J = 5.9 Hz, 1H), 7.67-7.74 (m, 2H), 8.30 (s, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | With sulfuric acid; nitric acid; at 0℃; for 1.0h; | A solution of 5-bromo-lH-indazole-3-carboxylic acid ethyl ester (1.5 g, 5.6 mmol, 1.0 eq) in cone. H2S04 (20 mL) was cooled to 0 C. A mixture of 70 percent HN03 (1.1 mL) and cone. H2S04 (3 mL) was added drop wise and the reaction was maintained for 1 h at 0 C. The mixture was poured into 100 mL of ice water and the solid was collected by filtration and dried in vacuo to give 5-bromo-4-nitro-lH-indazole-3-carboxylic acid ethyl ester (1.6 g, 91%) as a yellow solid. [00299] To a solution of 5-bromo-4-nitro-lH-indazole-3-carboxylic acid ethyl ester (1.6 g, 5.1 mmol, 1.0 eq) in EtOH (80 mL) was added Pd/C (320 mg). The reaction mixture was stirred at rt under 50 psi H2 for 5 h. The reaction was filtered and concentrated. The resulting residue was purified by chromatography on a silica gel column (DCM/MeOH = 50/1, v/v) to give 4-amino-lH-indazole-3-carboxylic acid ethyl ester (255 mg, 24%) as a yellow solid. |
86% | With sulfuric acid; nitric acid; In water; at 0℃; for 1.0h; | Ethyl 5-bromo-lH-indazole-3-carboxylate (5.02 mmol) was dissolved in sulfuric acid (20.0 mL) and was cooled to 0 C. A mixture of 70% nitric acid (7/3, nitric acid/water, 1.0 mL) and sulfuric acid (2.0 mL) was added dropwise and the reaction was maintained for 1 hour at 0 C. The reaction mixture was poured onto 100 mL of ice water and the solids collected by filtration, thus providing the product in 86% yield. The ester (3.82 mmol) was diluted with ethanol (10.0 mL) and 5 M sodium hydroxide (10.0 mL) and the reaction mixture was maintained for 4 h at ambient temperature. The reaction mixture was diluted with water (50 mL) and acidified to pH 1 with 6 N hydrochloric acid. The solids were collected by filtration, thus providing the acid in 82% yield |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
69.8% | With N-ethyl-N,N-diisopropylamine; In dichloromethane; at 20℃; | To a solution of ethyl 5-bromo-lH-indazole-3-carboxylate (CXIX) and trityl chloride in DCM was slowly added DIPEA. The solution was stirred at room temperature overnight. The reaction was poured into water and stirred for 5 min. The organic layer was separated, dried over MgS04 and concentrated under vacuum. The residue was purified by column chromatography using a ISCO 200RF system with a Si02 column (12 g) (100% hexanes? 10:90 EtOAc:hexanes) to produce a white solid. (357 mg, 0.70 mmol, 69.8% yield). NMR (DMSO-d6) delta ppm 1.34 (t, J=7Hz, 3H), 4.38 (q, J=7Hz, 2H), 6.43 (d, J=9.5Hz, 1H), 7.11-7.14 (m, 6H), 7.31-7.35 (m, 10H), 8.23 (d, J=2Hz, 1H); ESIMS found for CaglfeBrNaOa mlz 511.0 (M+H). |
69.8% | With N-ethyl-N,N-diisopropylamine; In dichloromethane; at 20℃; | To a solution of ethyl 5-bromo-lH-indazole-3-carboxylate (CXIX) and trityl chloride in DCM was slowly added DIPEA. The solution was stirred at room temperature overnight. The reaction was poured into water and stirred for 5 min. The organic layer was separated, dried over MgS04 and concentrated under vacuum. The residue was purified by column chromatography using a ISCO 200RF system with a Si02 column (12 g) (100% hexanes? 10:90 EtOAc:hexanes) to produce a white solid. (357 mg, 0.70 mmol, 69.8% yield). 1H NMR (DMSO-d6) delta ppm 1.34 (t, J=7Hz, 3H), 4.38 (q, J=7Hz, 2H), 6.43 (d, J=9.5Hz, 1H), 7.11-7.14 (m, 6H), 7.31-7.35 (m, 10H), 8.23 (d, J=2Hz, 1H); ESIMS found for C29H23BrN202 mlz 511.0 (M+H). |
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