Structure of 31191-08-9
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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. : | 31191-08-9 |
Formula : | C6H5NO2 |
M.W : | 123.11 |
SMILES Code : | O=CC1=NC=C(O)C=C1 |
MDL No. : | MFCD10697538 |
InChI Key : | HSODMUBHOXGNNQ-UHFFFAOYSA-N |
Pubchem ID : | 278389 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H332-H335 |
Precautionary Statements: | P280-P305+P351+P338-P310 |
Num. heavy atoms | 9 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 3.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 31.65 |
TPSA ? Topological Polar Surface Area: Calculated from |
50.19 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
0.36 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
0.29 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
0.6 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
-0.84 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
1.04 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
0.29 |
Log S (ESOL):? ESOL: Topological method implemented from |
-1.21 |
Solubility | 7.53 mg/ml ; 0.0612 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (Ali)? Ali: Topological method implemented from |
-0.91 |
Solubility | 15.3 mg/ml ; 0.124 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-1.35 |
Solubility | 5.46 mg/ml ; 0.0444 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 |
-6.85 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 |
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) |
1.18 |
* 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 |
---|---|---|
78% | With sodium hydroxide; | N-(5-Hydroxy-2-pyridinemethylene) hydroxylamine. To 200 mL of 2.5percent (w/w) sodium hydroxide solution was dissolved 5.5 g of 5-hydroxy-2-formylpyridine (45 mmol). Subsequently 12.5 g of hydroxylamine HCl (180 mmol) was added to the solution in one portion. The solution turned cloudy after being stirred for 10 minutes. After stirring at room temperature for 3 h, the precipitate was filtered under vacuum and dried in the air for several days to yield 4.8 g of N-(5-hydroxy-2-pyridinemethylene) hydroxylamine (78percent). The solid is of white and decomposes at 195° C. 1 H NMR (d6 -DMSO) delta: 11.27 (br. s, 1H); 10.83 (br. s, 1H); 8.18 (d, J=2 Hz, 1H); 8.05 (s, 1H, CH=N); 7.72 (d, J=9 Hz, 1H); 7.25 (d of d, J=2 Hz, 9 Hz, 1H). |
78% | With sodium hydroxide; | N-(5Hydroxy-2-pyridinemethylene) hydroxylamine. To 200 mL of 2.5percent (w/w) sodium hydroxide solution was dissolved 5.5 g of 5-hydroxy-2-formylpyridine (45 mmol). Subsequently 12.5 g of hydroxylamine HCl (180 mmol) was added to the solution in one portion. The solution turned cloudy after being stirred for 10 minutes. After stirring at room temperature for 3 h, the precipitate was filtered under vacuum and dried in the air for several days to yield 4.8 g of N-(5-hydroxy-2-pyridinemethylene) hydroxylamine (78percent). The solid is off white and decomposes at 195° C. 1 H NMR (d6 -DMSO) d: 11.27 (br. s, 1H); 10.83 (br. s, 1H); 8.18 (d, J=2 Hz, 1H); 8.05 (s, 1H, CH=N); 7.72 (d, J=9 Hz, 1H); 7.25 (d of d, J=2 Hz, 9 Hz, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With NaH; In water; N,N-dimethyl-formamide; | EXAMPLE 18 Preparation of 2-[(benzyloxycarbonyl)amino]-4-(5-hydroxy-2-pyridyl)-3-R,S-methylbutanoic acid. STR94 A. Methoxyethoxymethyl chloride (MEM) (19 g, 153 mmol) was added to a solution of <strong>[31191-08-9]5-hydroxy-2-pyridinecarboxaldehyde</strong> (18.4 g, 149 mmol)in 300 ml DMF. NaH (6.3 g of 60percent oil dispersion, 158 mmol) were added in portions while cooling the mixture to maintain 20°-30° C. The mixture was stirred an additional 1 hour at 25° C. 5 ml water were added, most of the solvent was evaporated, and water was added to the residue. The mixture was extracted with EtOAc. The extracts were dried over Na2 SO4, filtered, and evaporated to a residue. The residue was chromatographed on silica gel eluding with EtOAc-hexanes (35:65) to obtain 5-[(2-methoxyethoxy)methoxy]-2-pyridinecarboxaldehyde: C10 H13 NO4 (211.22); 1 H-NMR (CDCl3) delta 10.01 (s,1), 8.52 (d,1), 7.93 (d,1), 7.49 (m,1), 5.39 (s,2), 3.80 (m,2), 3.53 (m,2), 3.32 (s,3). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
3.6 g (35%) | With ammonium chloride; In tetrahydrofuran; hexane; ethyl acetate; N,N-dimethyl-formamide; | EXAMPLE 6 2-[2-(1-Hydroxyhexyl)-5-pyridyloxy]quinoline To a suspension of sodium hydride (3.6 g, 0.15 mol) in dry DMF (150 ml) containing 2-chloroquinoline (24.5 g, 0.15 mol) was added dropwise a solution of <strong>[31191-08-9]5-hydroxypyridine-2-carboxaldehyde</strong> (18.5 g, 0.15 mol) in dry DMF (75 ml). The solution was stirred vigorously with a mechanical stirrer. After the addition was complete (90 min.), the reaction was heated to about 90° C. for 12 hours. Most of the DMF was removed, and the residue was carefully poured into cold water. The aqueous solution was extracted with ethyl acetate (4*30 ml), and the organic extract was washed with water, brine, and then dried over MgSO4. All volatiles were removed to leave the crude aldehyde intermediate (26 g) which was pure enough to be used in the next step. To a cold (-30° C.) solution of 5-(2-quinolinyloxy)-2-pyridine carboxaldehyde (8 g, 0.032 mol) in dry THF (125 ml) was added a solution of pentylmagnesium bromide (prepared from 4.83 g (0.032 mol) of 1-bromopentane and 0.78 g (0.032 mol) of Mg turnings in THF (60 ml). After the addition of the Grignard reagent was complete (-45° C.), the solution was stirred at this temperature for 90 minutes, and allowed to slowly warm up to room temperature in about 2 hours. The reaction was quenched by adding a saturated solution of ammonium chloride. The clear organic layer was decanted, and most of the volatiles were removed. The residue was taken up in ethyl acetate, and then washed with water, brine, and dried over MgSO4. After removal of the ethyl acetate the crude residue (7.7 g) was purified by HPLC (silica gel; 25percent ethyl acetate in hexane) to give 3.6 g (35percent) of pure product. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With manganese(IV) oxide; In isopropyl alcohol; at 85℃; for 2h; | An activated MnO2 (2.5 times more in weight) was added to the 6-(hydroxymethyl)pyridin-3-ol and the reactants were suspended in i-PrOH The reaction mixture was refluxed for 2 h (the boiling should not significantly exceed this time), after which it was cooled down and filtered. The resulting turbid dark solution was centrifuged and carefully decanted. The pure product could be obtained by recrystallization from boiling water as a brown crystalline solid. Yield 2.9 g (60 %). 1H NMR (400MHz, DMSO-d6 ): delta 11.10 (s, 1 H); 9.83 (s, 1 H); 8.32 (d, J = 2.2, 1 H); 7.85 (d, J = 9.5, 1 H); 7.33 (dd, J = 2.1, J = 8.6, 1 H); |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With potassium carbonate; In N,N-dimethyl-formamide; at 100℃; for 1h; | Anhydrous potassium carbonate (1 eq) and bromoethane (1 eq) were added to a solution of 5-hydroxy-pyridine-2-carbaldehyde (leq) in DMF (3.4ml / mmol). The reaction mixture was stirred at 1000C for Ih then diluted with water. The aqueous layer was extracted twice with ethyl acetate. The organic layers were combined, dried on anhydrous Na2SO4 filtered and concentrated in vacuum to give the titled compound in 90percent yield. 1H-NMR (CDCl3): delta (ppm) 1.48 (t, 3H); 4.16 (q, 2H); 7.27 (dd, IH), 7.94 (d, IH); 8.41 (d, IH); 9.97 (s, IH); MS (ESI+): m/z = 152 [M+H]+ |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | With potassium carbonate; In N,N-dimethyl-formamide; at 100℃; for 1h; | Anhydrous potassium carbonate (1 eq) and 2-bromopropane (1 eq) were added to a solution of 5-hydroxy-pyridine-2-carbaldehyde (leq) in DMF (3.4ml/mmol). The reaction mixture was stirred at 100°C for Ih then diluted with water. The aqueous layer was extracted twice with ethyl acetate. The organic layers were combined, dried on anhydrous Na2SO4 filtered and concentrated in vacuum to give the titled compound in 82percent yield. 1H-NMR (DMSO-t/6): delta (ppm) 1.40 (d, 6H); 4.70 (quint, IH); 7.25 (dd, IH); 7.94 (d, IH); 8.38 (d, IH); 9.97 (brs, IH); MS (ESI+): m/z = 166 [M+H]+ |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With acetic acid; at 120℃; for 4h; | General procedure: To a solution of 3-substituted 2-thioxo-1,3-thiazolidin-4-one 4 (1.0 equiv) and 3-bromo-4-hydroxybenzaldehyde (1.0 equiv) in acetic acid (4 mL/mmol) was added ammonium acetate (2.0 equiv) or beta-alanine (4.0 equiv). Then the mixture was stirred at 120 °C for 4 h. After cooling, the precipitate was collected by filtration and washed with water. The solid was triturated with ethanol to afford the title product (1). |
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