Structure of 42972-46-3
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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. : | 42972-46-3 |
Formula : | C8H9NO |
M.W : | 135.16 |
SMILES Code : | CC(=O)C1=CC(C)=CN=C1 |
MDL No. : | MFCD11553496 |
InChI Key : | DIASEPULVQSMAS-UHFFFAOYSA-N |
Pubchem ID : | 577569 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302-H315-H320-H335 |
Precautionary Statements: | P261-P280-P301+P312-P302+P352-P305+P351+P338 |
Num. heavy atoms | 10 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.25 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 39.4 |
TPSA ? Topological Polar Surface Area: Calculated from |
29.96 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.58 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
0.9 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.59 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
0.46 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.11 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.33 |
Log S (ESOL):? ESOL: Topological method implemented from |
-1.62 |
Solubility | 3.22 mg/ml ; 0.0238 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (Ali)? Ali: Topological method implemented from |
-1.11 |
Solubility | 10.4 mg/ml ; 0.0769 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.72 |
Solubility | 0.26 mg/ml ; 0.00192 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 |
-6.49 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 |
0.55 |
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) |
1.18 |
* 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 |
---|---|---|
With potassium carbonate; In water; at 20℃; for 2.5h; | Potassium carbonate (1.97 g, 14.26mmol) was portionwise added to a cold solution of glyoxylic acid (0.548 g, 7.4mmol) in water (10 mL) and the title compound from Preparation 78 (1 g, 7.4 mmole) was slowly incorporated. The mixture was stirred at room temperature for 2.5 hours and then cooled in ice. Acetic acid (3ml, 51.8mmol) was added, followed by hydrazine monohydrate (0.43 mL, 8.9mmol). The solution was heated under reflux for 2 hours and cooled in ice. The pH was adjusted to 7 by the addition of saturated aq. sodium bicarbonate and the solid obtained filtered, washed with cold water, diethyl ether and dried under vacuum to yield a orange solid (0.69 g, 50 %) which was used in the next step without further purification. 8 (DMSO-d6): 2.40 (s, 3H), 7.05 (d,1H), 8.10 (d, 2H), 8.50 (bs,1H), 8.90 (d, 1H). LRMS (m/z): 188 (M+1) +. Retention Time: 4.57 min. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
91% | In diethyl ether; at 0 - 20℃; for 6.0h; | To an ice-cooled suspension of the title compound of Preparation 77 (2.67 g, 14.8 mmole), methyl magnesium bromide (3M in diethyl ether, 9.86 mL) was dropwise added under argon. After the addition was completed, the reaction mixture was stirred at 0 C for one hour and the temperature was then allowed to rise to room temperature and stirred for five additional hours. After this period of time, the reaction was poured into ice, brine was added and the aqueous phase extracted with EtOAc, dried and concentrated to afford a yellowish oil (1.81 g, 91 %) which was used in the next step without further purification. (CDCI3) : 2.40 (s, 3H), 2.65 (s, 3H), 8.05 (bs, 1 H), 8.62 (d,1 H), 8.98 (d, 1H). LRMS (m/z): 136(M+1) +. Retention Time: 4.77 min. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
14% | With sodium tris(acetoxy)borohydride; acetic acid; In 1,2-dichloro-ethane; at 80℃; for 1.0h;Microwave irradiation; | Example 12; To a solution of l-(5-methylpyridin-3-yl)ethanone (135 mg, 1 mmol) and N-[(15)-l-(3-aminophenyl)ethyl]-6-chloropyrazin-2-amine (248 mg, 1 mmol) in 1,2-dichloroethane (5 mL) was added sodium triacetoxyborohydride (300 mg, 1.4 mmol), in one portion, and glacial acetic acid (0.18 mL, 3 mmol). The mixture was heated in the microwave reactor at 800C for 1 hour. After this time the mixture was stirred with dilute aqueous hydrochloric acid (2M, 7 mL) for 15 minutes and the two phases were separated. The aqueous phase was basified to pH 9 with solid potassium hydroxide and was extracted with dichloromethane (2 x 20 mL). The extracts were washed with brine (20 mL), dried (MgSθ4) and concentrated under reduced pressure to give an orange oil which was purified by flash chromatography (silica, ethyl acetate/methanol) to give6-chloro-N-[( 1 S)- 1 -(3 - { [ 1 -(3-methy lpheny l)ethy l]amino} pheny l)ethy l]pyrazin-2 -amine (52 mg, 14%) as a pale yellow oil. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
30% | In tetrahydrofuran; diethyl ether; for 2.0h;Heating / reflux; | Synthesis of N-(2-methyl-5-nitrophenyl)-4-(5-methylpyridin-3-yl)pyrimidin-2-amine 21; 5-Methyl-nicotinonitrile (2.08 g, 17.6 mmol) is heated at reflux in dry THF (20 mL) with MgMeBr (3 M solution in Et2O, 10 mL, 30 mmol) for 2 h. After cooling down, aq. Na2CO3 is added slowly to quench the reaction. Extractions with DCM affords the crude <n="33"/>mixture which is purified by silica gel chromatography to yield l-(5-methyl-pyridin-3-yl)- ethanone 18 (0.7 g, 30 %). LC/MS (m/z) (M+l)+: 136.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
To 3-bromo-5-methylpyridine 1-1 (2 g, 11.63 mmol) in diethyl ether (30 ml) at -78 C was added uLi (8.72 ml, 13.95 mmol) dropwise. After 30 min, N-methoxy-N- methylacetamide n-BuLi was added. The resulting mixture was stirred at -78 C for 2 h then at rt overnight, quenched with saturated NH4CI solution and diluted with EtOAc. The organic layer was washed with water, brine, dried over magnesium sulfate and concentrated to give a yellow residue, which was purified by column chromatography (0-65% EtOAc in hexane) to give the desired product 1-2: 1H NMR (400 MHz, CDCI3) δ 8.98 (s, IH), 8.62 (s, IH), 8.04 (s, IH), 2.63 (s, 3H)5 2.41 (s, 3H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium ethanolate; In tetrahydrofuran; ethanol; at 20 - 60℃; | To a mixture of 1-2 (0.5 g, 3.70 mmol) and diethyl oxalate (1.010 ml, 7.40 mmol) in THF (15 ml) was added sodium ethoxide (3.45 ml, 21% wt. in ethanol, 9.25 mmol). The resulting mixture was heated at 60 C for lh followed by stirring at rt overnight. The reaction mixture was poured into cold hexane and the desire product 1^3 was collected as a light yellow solid: ESI+ MS [M+H]+ C12HI4N04 = 236.1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
600 mg | With hydrogen bromide; bromine; acetic acid; at 20℃; for 2.0h; | 2-bromo-<strong>[42972-46-3]1-(5-methylpyrid-3-yl)ethanone</strong> hydrobromide 300 mg (2.22 mmol) of <strong>[42972-46-3]1-(5-methylpyrid-3-yl)ethanone</strong> are dissolved in 15 mL of glacial acetic acid. 365 μl (2.22 mmol) of hydrobromic acid and 126 μΙ (2.44 mmol) of bromine are added to the medium. The reaction mixture is placed under magnetic stirring at room temperature for 2 hours. Ethyl ether is added to the solution until a precipitate appears. The precipitate corresponding to 2-bromo-<strong>[42972-46-3]1-(5-methylpyrid-3-yl)ethanone</strong> hydrobromide is filtered off, washed with ether and dried. The 600 mg of product obtained have the following characteristics: LC/MS (method G): ESI+ [M+H]+: m/z 214 tr (min) = 1.17. 1H NMR (300 MHz, δ in ppm, DMSO-d6): 2.46 (s, 3H), 5.05 (s, 2H), 8.48 (s,1 H), 8.82 (s, 1 H), 9.12 (s, 1 H). |
600 mg | With hydrogen bromide; bromine; In acetic acid; at 20℃; for 2.0h; | 300 mg (2.22 mmol) of <strong>[42972-46-3]1-(5-methylpyrid-3-yl)ethanone</strong> are dissolved in 15 mL of glacial acetic acid. 365 μl (2.22 mmol) of hydrobromic acid and 126 μl (2.44 mmol) of bromine are added to the medium. The reaction mixture is placed under magnetic stirring at room temperature for 2 hours. Ethyl ether is added to the solution until a precipitate appears. The precipitate corresponding to 2-bromo-<strong>[42972-46-3]1-(5-methylpyrid-3-yl)ethanone</strong> hydrobromide is filtered off, washed with ether and dried. The 600 mg of product obtained have the following characteristics: LC/MS (method G): ESI+ [M+H]+: m/z 214 tr (min)=1.17 1H NMR (300 MHz, δ in ppm, DMSO-d6): 2.46 (s, 3H), 5.05 (s, 2H), 8.48 (s, 1H), 8.82 (s, 1H), 9.12 (s, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
300 mg | With bis-triphenylphosphine-palladium(II) chloride; tributyl(1-ethoxyvinyl)stannane; potassium carbonate; In water; N,N-dimethyl-formamide; at 110℃; for 1.0h;Microwave irradiation; | The following are successively introduced into a microwave tube: 484 μΙ (4.07 mmol) of 3-bromo-5-methylpyridine in 20 mL of H2O/DMF: (1/3: v/v), 2.03 mL (5.70 mmol) of tributyl(1-ethoxyvinyl)tin, 57.12 mg (0.081 mmol) of bis(triphenylphosphine)palladium(ll) chloride, 1.12 g (8.14 mmol) of potassium carbonate. This mixture is subjected to microwave irradiation at 110C for 1 hour. The reaction mixture is evaporated to dryness and the residue is then taken up in water and extracted with ethyl acetate. The organic phase is dried over magnesium sulfate and evaporated to dryness. The residue obtained is taken up in 6 mL of methanol and 1 mL of 6 N HCl, and the solution is stirred overnight at room temperature. The reaction medium is evaporated to dryness and the residue is taken up in saturated aqueous NaHCO3 solution and extracted with ethyl acetate. The organic phase is dried over magnesium sulfate and evaporated to dryness. The residue is purified by chromatography on silica gel (eluent: 50/50 EtOAc/heptane) to give 300 mg of 1-(5- methylpyrid-3-yl)ethanone, the characteristics of which are as follows: LC/MS (method G): ESI+ [M+H]+: m/z 136 tr (min) = 0.78 1H NMR (300 MHz, δ in ppm, DMSO-d6): 2.37 (s, 3H), 2.62 (s, 3H), 8.1 (s, 1 H), 8.63 (s, 1 H), 8.93 (s, 1 H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
300 mg | With bis-triphenylphosphine-palladium(II) chloride; potassium carbonate; In water; N,N-dimethyl-formamide; at 110℃; for 1.0h;Microwave irradiation; | The following are successively introduced into a microwave tube: 484 μl (4.07 mmol) of 3-bromo-5-methylpyridine in 20 mL of H2O/DMF: (1/3: v/v), 2.03 mL (5.70 mmol) of tributyl(1-ethoxyvinyl)tin, 57.12 mg (0.081 mmol) of bis(triphenylphosphine)palladium(II) chloride, 1.12 g (8.14 mmol) of potassium carbonate. This mixture is subjected to microwave irradiation at 110 C. for 1 hour. The reaction mixture is evaporated to dryness and the residue is then taken up in water and extracted with ethyl acetate. The organic phase is dried over magnesium sulfate and evaporated to dryness. The residue obtained is taken up in 6 mL of methanol and 1 mL of 6 N HCl, and the solution is stirred overnight at room temperature. The reaction medium is evaporated to dryness and the residue is taken up in saturated aqueous NaHCO3 solution and extracted with ethyl acetate. The organic phase is dried over magnesium sulfate and evaporated to dryness. The residue is purified by chromatography on silica gel (eluent: 50/50 EtOAc/heptane) to give 300 mg of 1-(5-methylpyrid-3-yl)ethanone, the characteristics of which are as follows: LC/MS (method G): ESI+ [M+H]+: m/z 136 tr (min)=0.78 1H NMR (300 MHz, δ in ppm, DMSO-d6): 2.37 (s, 3H), 2.62 (s, 3H), 8.1 (s, 1H), 8.63 (s, 1H), 8.93 (s, 1H). |
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