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CAS No. : | 372118-01-9 |
Formula : | C6H4Cl2N2O2 |
M.W : | 207.01 |
SMILES Code : | ClC1=C(N=NC(=C1)Cl)C(=O)OC |
MDL No. : | MFCD09953612 |
InChI Key : | MZEVRGMQXLNKEZ-UHFFFAOYSA-N |
Pubchem ID : | 17848322 |
GHS Pictogram: | ![]() |
Signal Word: | Warning |
Hazard Statements: | H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 12 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.17 |
Num. rotatable bonds | 2 |
Num. H-bond acceptors | 4.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 43.33 |
TPSA ? Topological Polar Surface Area: Calculated from | 52.08 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 | 1.62 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from | 1.57 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from | 1.16 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by | 2.05 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions | 1.67 |
Log S (ESOL):? ESOL: Topological method implemented from | -2.38 |
Solubility | 0.859 mg/ml ; 0.00415 mol/l |
Class? Solubility class: Log S scale | Soluble |
Log S (Ali)? Ali: Topological method implemented from | -2.33 |
Solubility | 0.977 mg/ml ; 0.00472 mol/l |
Class? Solubility class: Log S scale | Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by | -2.97 |
Solubility | 0.223 mg/ml ; 0.00108 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 | -6.41 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) | 1.99 |
* 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 |
---|---|---|
72% | With trichlorophosphate; at 95.0℃; for 5h; | Step 3 4,6-Dichloro-pyridazine-3-carboxylic acid methyl ester A mixture of <strong>[372118-00-8]4,6-dihydroxy-pyridazine-3-carboxylic acid methyl ester</strong> (10.5 g, 61.7 mmol) and POCl3 (70 mL) was heated to 95 C. for 5 h. The excess POCl3 was removed under reduced pressure, then the crude residue was added to ice-water (250 mL) and extracted with ethyl acetate (3*100 mL). The combined extracts were dried then concentrated to give a crude residue which was purified by chromatography (silica, 100-200 mesh, 30% ethyl acetate in hexane) to give 4,6-dichloro-pyridazine-3-carboxylic acid methyl ester (9.2 g, 72%) as an off white solid. LC-MS: 207.0 [M+H]+. |
64.3% | With trichlorophosphate; for 3h;Reflux; | A slurry of <strong>[372118-00-8]methyl 4,6-dihydroxypyridazine-3-carboxylate</strong> (11.7 g, 68.8 mmol) in POCl3 (110 mL, 1180 mmol) was heated to reflux for 3h during which time the mixture became a nearly homogeneous dark brown solution. The reaction mixture was cooled to rt, allowed to stand overnight and concentrated in vacuo. The resulting dark brown residue was dissolved in DCM (?300 mL) and was slowly poured onto ?500 mL of crushed ice with swirling of the flask. After the addition was complete, water was slowly added (?200 mL) until the mixture became stirrable and the mixture was stirred while warming to rt over ?3 h. The resulting phases were separated and the aqueous portion was extracted with additional DCM (3*100 mL). The combined extracts were washed with brine, dried over anhydrous sodium sulfate, decanted and concentrated under vacuum to afford a white solid as the pure product, methyl 4,6-dichloropyridazine-3-carboxylate (9.16 g, 44.2 mmol, 64.3% yield). Material was used as is without any further purification. MS (M+1) m/z: 206.9 (MH+). LC retention time 0.80 min [A]. |
With trichlorophosphate; at 95.0℃; for 4h; | Step 3.Preparation of 4,6-dichloro-pyridazine-3-carboxylic acid methyl or ethyl ester 5 A mixture of 4,6-dihydroxy-pyridazine-3-carboxylic acid methyl or ethyl ester (50 mmol) and POCl3 (90 ML) is heated at 95 C. for 4 hours.The excess POCl3 is evaporated in vacuo and to the residue cooled to 0 C. was added ice (150 g) followed by EtOAc (200 ML).The layers are separated and the aqueous layer is extracted with EtOAc (2*100 ML).The combined extracts are washed with brine (200 ML), dried (Na2SO4) and evaporated in vacuo.This residue is purified by flash column chromatography (225 g silica gel, eluted with 4:1 hexane, EtOAc).The desired 4,6 dichloro-pyridazine-3-carboxylic acid methyl ester is obtained as a white solid, while the 4,6 dichloro-pyridazine-3-carboxylic acid ethyl ester is a colorless liquid. |
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 |
---|---|---|
19% | With tris-(dibenzylideneacetone)dipalladium(0); 4a,9a-dihydro-9,9-dimethyl-4,5-bis(diphenylphosphino)-xanthene; caesium carbonate; In 1,4-dioxane; at 100℃; for 1h;Inert atmosphere; | Step 1 Methyl 6-chloro-4-(5-(methylsulfonyl)pyridin-2-ylamino)pyridazine-3-carboxylate A flask was charged with methyl 4,6-dichloropyridazine-3-carboxylate (200 mg, 0.966 mmol), <strong>[35196-11-3]5-(methylsulfonyl)pyridin-2-amine</strong> (183 mg, 1.06 mmol), Pd2(dba)3 (88.5 mg, 0.097 mmol), xantphos (112 mg, 0.193 mmol) and cesium carbonate (944 mg, 2.9 mmol). 1,4-Dioxane (6.0 mL) was added and argon was bubbled through it while sonicating the flask for 5 min. The flask was sealed and heated at 100 C. for 1 h. After cooling the mixture was filtered through celite and the filter cake washed with CH2Cl2. The filtrates were concentrated in vacuo then purified by chromatography (spherical silica 20-45 μM, 23 g, Versaflash Supelco, 0 to 100% ethyl acetate in hexanes, 30 min) to give methyl 6-chloro-4-(5-(methylsulfonyl)pyridin-2-ylamino)pyridazine-3-carboxylate (62 mg, 19%) as a light yellow solid. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 11.18 (s, 1H) 9.31 (s, 1H) 8.98 (d, J=2.27 Hz, 1H) 8.19 (dd, J=8.59, 2.53 Hz, 1H) 7.09 (dd, J=8.84, 0.76 Hz, 1H) 4.15 (s, 3H) 3.15 (s, 3H). LCMS (EI/CI) m/z: 342.9 [M+H]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
28% | In ethanol; at 90℃; for 5h; | Compound 4,6-dichloropyridazine-3-carboxylic acid methyl ester 1a (1 g, 5 mmol) and tert-butyl 2- (4-aminophenyl) acetate 55c (1 g, 5 mmol) were dissolved in ethanol (10 mL), Heat to 90 C and stir for 5 hours.After cooling to room temperature, the solvent was removed under reduced pressure, and the residue was purified by silica gel column chromatography (petroleum ether / ethyl acetate = 100/0 to 7/3),The target product 4-((4- (2-tert-butoxy-2-oxoethyl) phenyl) amino) -6-chloropyridazine-3-carboxylic acid methyl ester 55d (540 mg, colorless oil was obtained ). Yield: 28%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
89% | With N-ethyl-N,N-diisopropylamine; In ethanol; at 80℃; for 18h; | Compound 4,6-dichloropyridazine-3-carboxylic acid methyl ester 1a (1 g, 4.83 mmol),6-morpholinopyridine-3-amine (870 mg, 4.83 mmol),Diisopropylethylamine (1.24 g, 9.66 mmol) and ethanol (20 mL) were mixed, heated to 80 C and stirred for 18 hours.After cooling to room temperature, the solvent was removed under reduced pressure, and the residue was purified by silica gel column chromatography (dichloromethane / methanol = 19/1).The target product 6-chloro-4-((6-morpholinopyridin-3-yl) amino) pyridazine-3-carboxylic acid methyl ester 36a (1.5 g, yellow solid) was obtained,Yield: 89%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
59% | With N-ethyl-N,N-diisopropylamine; In ethanol; at 80℃; for 2h; | Compound 4,6-dichloropyridazine-3-carboxylic acid methyl ester 1a (206 mg, 1 mmol),<strong>[28466-26-4]1H-pyrazole-4-amine</strong> (83mg, 1mmol),Diisopropylethylamine (258mg, 2mmol)Mix with ethanol (20 mL), heat to 80 C and stir for 2 hours.After cooling to room temperature, the solvent was removed under reduced pressure, and the residue was purified by silica gel column chromatography (dichloromethane / methanol = 19/1).The target product 4-((1H-pyrazol-4-yl) amino) -6-chloropyridazine-3-carboxylic acid methyl ester 41a (150 mg, yellow solid) was obtained,Yield: 59%. |
Tags: 372118-01-9 synthesis path| 372118-01-9 SDS| 372118-01-9 COA| 372118-01-9 purity| 372118-01-9 application| 372118-01-9 NMR| 372118-01-9 COA| 372118-01-9 structure
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H413 | May cause long-lasting harmful effects to aquatic life |
H420 | Harms public health and the environment by destroying ozone in the upper atmosphere |
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