Structure of 36936-23-9
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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. : | 36936-23-9 |
Formula : | C6H7ClN2 |
M.W : | 142.59 |
SMILES Code : | NC1=NC(C)=C(Cl)C=C1 |
MDL No. : | MFCD09453335 |
InChI Key : | SHIKRPPKGCWKJO-UHFFFAOYSA-N |
Pubchem ID : | 12251007 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H302-H319 |
Precautionary Statements: | P305+P351+P338 |
Num. heavy atoms | 9 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.17 |
Num. rotatable bonds | 0 |
Num. H-bond acceptors | 1.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 38.62 |
TPSA ? Topological Polar Surface Area: Calculated from |
38.91 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.53 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
1.53 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.63 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.16 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
1.74 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.52 |
Log S (ESOL):? ESOL: Topological method implemented from |
-2.18 |
Solubility | 0.939 mg/ml ; 0.00659 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-1.96 |
Solubility | 1.58 mg/ml ; 0.0111 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.64 |
Solubility | 0.324 mg/ml ; 0.00227 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 |
-6.08 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) |
1.42 |
* 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 |
---|---|---|
5.28 g (67%) | With aq. NaOH; nitric acid; | 2-Amino-5-chloro-6-methyl-3-nitropyridine (46) To stirred conc H2 SO4 (70 mL) at 0 C. was added 45 (6.0 g, 41.8 mmol) in portions. To the resulting dark brown solution was added dropwise 70% HNO3 (3.5 mL, 54 mmol) at 0 C. After the addition, the reaction mixture was stirred at 50 C. under N2 for 2.5 h, cooled to room temperature and poured into crushed ice (about 700 g). The mixture was basified to pH 9 by the addition of 40% aq. NaOH dropwise with stirring and cooling (ice-water bath). The precipitate was filtered, washed with water (4*100 mL) and MeOH (3*25 mL), and dried to give 5.28 g (67%) of 46 as a yellow powder, mp 214-5 C. (lit. 214-6 C., Cress et al., J. Org. Chem. 93-6 (1976)). 1 H NMR (DMSO-d6) delta2.445 (s, 3H), 8.011 (bs, 2H), 8.340 (s, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With N-chloro-succinimide; In hexane; N,N-dimethyl-formamide; | 2-Amino-5-chloro-6-methylpyridine (45) To a stirred solution of 2-amino-6-methylpyridine (10.80 g, 100.0 mmol) in dry DMF (50 mL) was added dropwise a solution of NCS (13.35 g, 100.0 mmol) in dry DMF (60 mL) at 0 C. over 20 min. The resulting brown yellow solution was stirred at 0 C. for 1 h, and at room temperature for 3 h, then poured into ice-water (about 300 mL). The resulting mixture was extracted with EtOAc (4*100 mL). The extracts were combined, washed with brine (6*50 mL), dried (MgSO4), and rota-evaporated. To the residual viscous black oil was added hexane (200 mL) and it was heated to boiling with stirring. The hot hexane solution was decanted carefully, concentrated to about 60 ml, then allowed to stand at room temperature overnight. The resulting crystals were filtered and dried at room temperature in vacuo, giving 6.06 g (42%) of 45 as orange-colored long needles, mp 74-5 C. (lit. 73-4 C., Cress et al., J. Org. Chem. 93-6 (1976)). 1 H NMR (CDCl3) delta2.439 (s, 3H), 4.376 (bs, 2H), 6.302 (d, 1H, J=8.5), 7.340 (d, 1H, J=8.5). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With m-chloroperoxybenzoic acid; In hydrogenchloride; dichloromethane; | Step E Preparation of 5-chloro-6-methyl-2-pyridinamine 1-oxide, hydrochloride To a solution of 110 g (666 mmol) of <strong>[36936-23-9]5-chloro-6-methyl-pyridineamine</strong> (Kress, T. J.; Moore, L. L.; Costantino, S. M. J. Org. Chem. (1976) 41(1), pp 93-96) in 1 L of dichloromethane was added 164 g (666 mmol) of m-chloroperoxybenzoic acid. The mixture was stirred at room temperature overnight and 20 g more of m-chloroperoxybenzoic acid was added. The mixture was stirred 1 h and 50 mL of saturated aqueous NaHSO3 were added. The solvent was removed and the residue was taken up in 1L of 1N HCl. The insoluble solids were filtered and washed with 3N HCl. Solvent was removed from the aqueous filtrate to give a solid which was recrystallized from ethanol affording 56.9 g of 5-chloro-6-methyl-2-pyridinamine 1-oxide, hydrochloride as a white solid, mp>250 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
20% | In acetonitrile; at 130℃; for 36.0h; | Step 1 Methyl 6-chloro-4-(5-chloro-6-methylpyridin-2-ylamino)pyridazine-3-carboxylate A pressure tube was charged with methyl 4,6-dichloropyridazine-3-carboxylate (2 g, 9.66 mmol) and <strong>[36936-23-9]5-chloro-6-methylpyridin-2-amine</strong> (2.76 g, 19.3 mmol). To the mixture was added acetonitrile (12 mL) and the reaction mixture heated with stirring at 130 C. for 1.5 days. After cooling to room temperature, the acetonitrile was removed in vacuo. The residue obtained was purified by chromatography (silica, 80 g, 50 mum from Analogix, 0% to 5% acetone in dichloromethane over 20 min., holding at 5% for 5 min, then increasing the gradient from 5% to 10% over the next 20 min) to give methyl 6-chloro-4-(5-chloro-6-methylpyridin-2-ylamino)pyridazine-3-carboxylate (618 mg, 20%) as an orange solid. 1H NMR (400 MHz, CHLOROFORM-d) delta ppm 10.70 (br. s., 1H), 9.18 (s, 1H), 7.63 (d, J=8.34 Hz, 1H), 6.78 (d, J=8.34 Hz, 1H), 4.12 (s, 3H), 2.66 (s, 3H), 1.58 (br. s., 1H); LC-MS 313 [M+H]+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
84% | With pyridine; In chloroform; at 0 - 100℃; for 12.0h; | To a stirred solution of compound LXVIII (3 g, 21.12 mmol) in chloroform (60 ml) was addedpyridine (15 ml) at 0C followed by addition of 4-tert-butylbenzenesulfonyl chloride (XI, 5.89g, 25.34 mmol). The reaction mixture was heated at 100C for 12 h, cooled to room temperature and concentrated under reduced pressure. The crude material was diluted with a saturated ammonium chloride solution and extracted with ethyl acetate. The organic layer was washed with brine solution, dried over anhydrous Na2SO4 and evaporated under reducedpressure to afford 4-(tert-butyl)-N-(5 -chloro-6-methylpyridin-2-yl)benzenesulfonamide(LXIX; 6 g, 84% yield). ?H NMR (400 MHz, DMSO-d6) oe 11.11 (bs, 1H), 7.86-7.84 (d, J8.4 Hz, 2H), 7.72-7.70 (d, J 8.8 Hz, 1H), 7.60-7.58 (d, J 8.4 Hz, 2H), 6.94-6.93 (d, J= 7.6Hz, 1H), 2.36 (s, 3H), 1.27 (s, 9H). MS (M+1): 339.2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
44.6% | With tert.-butylnitrite; copper dichloride; In dichloromethane; at 20℃; for 0.5h; | Intermediate IXc 3 ,6-dichloro-2-methylpyridine To a suspension of <strong>[36936-23-9]5-chloro-6-methylpyridin-2-amine</strong> (7.5 g, 52.60 mmol, Combi- Blocks) in DCM (200 niL) was added copper(II) chloride (9.19 g, 68.38 mmol) and stirred at for 10 min. tert-butyl nitrite (12.50 mL, 105.20 mmol) was added and the stirring was continued further 30 min at RT. The colour was changed to dark blue. The reaction was monitored by LCMS. LCMS showed the completion of reaction. The reaction mixture was washed with water, brine solution, and organic layer was dried on sodium sulphate and concentrated under vacuum to get crude. The product was purified by column chromatography using 5 % ethyl acetate :hexane mixture to get 3,6-dichloro- 2-methylpyridine (3.80 g, 44.6 %) as a yellow liquid. MS (ES+), (M+H)+ = 162.15 for C6H5C12N. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With NCS; | Example 172 Synthesis of 5-chloro-6-methylpyridin-2-amine. To a solution of 6-methylpyridin-2-amine (1.08 g, 1 mmol) in DMF (10 mL) was added NCS (1.34 g, 1 mmol), then the mixture was stirred at RT for 12 h. The mixture was treated with ice H2O and extracted with EtOAc (100 mL). The organic layer was washed with brine, dried over Na2SO4, concentrated to give the crude product which was purified with silica gel chromatography (PE/EA=2:1) to give 5-chloro-6-methylpyridin-2-amine as a yellow solid (750 mg, yield: 53%). ESI-MS [M+H]+: 142.9. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydrogencarbonate; | Synthesis of 6-chloro-2-(chloromethyl)-5-methylimidazo[1,2-a]pyridine. To a solution of <strong>[36936-23-9]5-chloro-6-methylpyridin-2-amine</strong> (500 mg, 3.51 mmol) in DME (20 mL) was added 1,3-dichloropropan-2-one (667 mg, 5.26 mmol), then the mixture was stirred at 90 C. for overnight. The mixture was treated with NaHCO3 to adjust pH 8 and extracted with EtOAc (100 mL*3). The organic layers were washed with brine, dried over Na2SO4, concentrated to give the crude product which was purified with silica gel chromatography (EA/DCM=1:5) to give 6-chloro-2-(chloromethyl)-5-methylimidazo[1,2-a]pyridine (357 mg, yield: 47%) as white oil. ESI-MS [M+H]+: 214.9. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Example 9 Synthesis of (5-methylimidazo[1,2-a]pyridin-2-yl)methanol. A solution of <strong>[36936-23-9]5-chloro-6-methylpyridin-2-amine</strong> (568 mg, 4.0 mmol), ethyl 3-bromo-2-oxopropanoate (1.2 g, 6.0 mmol) in dry EtOH (10 mL) was stirred at 80 C. for 8 h. The mixture was concentrated and purified by silica gel chromatography (DCM/MeOH=20/1) to give ethyl 6-chloro-5-methylimidazo[1,2-a]pyridine-2-carboxylate (800 mg, yield: 84.0%) as a yellow solid. ESI-MS [M+H]+: 239.1. |