Structure of 2613-34-5
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CAS No. : | 2613-34-5 |
Formula : | C6H4ClF2N |
M.W : | 163.55 |
SMILES Code : | C1=C(C(=C(C(=C1)F)Cl)F)N |
MDL No. : | MFCD00042200 |
Boiling Point : | No data available |
InChI Key : | BNTNWQPIBPBJOO-UHFFFAOYSA-N |
Pubchem ID : | 223089 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 10 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 0 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 35.77 |
TPSA ? Topological Polar Surface Area: Calculated from |
26.02 ?2 |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.56 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.07 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
3.05 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
2.94 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.62 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
2.45 |
Log S (ESOL):? ESOL: Topological method implemented from |
-2.6 |
Solubility | 0.409 mg/ml ; 0.0025 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-2.25 |
Solubility | 0.929 mg/ml ; 0.00568 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-3.2 |
Solubility | 0.102 mg/ml ; 0.000627 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 |
-5.83 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 |
2.0 |
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 |
2.0 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) |
1.43 |
* 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 N-Bromosuccinimide; In N-methyl-acetamide; hexane; water; | 18.9 g of N-bromosuccinimide was gradually added to a stirred solution of 17.4 g of <strong>[2613-34-5]3-chloro-2,4-difluoroaniline</strong> in 150 cm3 of dry dimethylformamide, cooled to a temperature in the region of -20 C., while this temperature was maintained. After stirring for 1 hour, the temperature was brought to the region of 20 C. and then the mixture was concentrated under reduced pressure (5 kPa), at a temperature in the region of 60 C. The residue obtained was supplemented with 400 cm3 of hexane and 200 cm3 of water. The mixture was stirred and the aqueous phase decanted off. The latter was extracted three times with successively 200, 200, and 100 cm3 of hexane. The extracts were combined, washed twice with 200 cm3 of water and twice with 200 cm3 of a saturated aqueous sodium chloride solution. After drying over magnesium sulphate, the organic solution was concentrated under reduced pressure (5 kPa) at a temperature in the region of 40 C. 19.2 g of 2-bromo-5-chloro-4,6-difluoroaniline was obtained in the form of a white solid, which melted at 62 C. 3-Chloro-2,4-difluoroaniline was prepared in the following manner: |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
57% | Comparative Example 3 Comparative Example 2 is repeated with 90 mg of catalyst and 14.8 g of 3-chloro-2,4-difluoronitrobenzene. The duration of the reaction is 400 min. The degree of conversion of the nitrated derivative is 100%. The 3-chloro-2,4-difluoroaniline yield is 57%. The remainder is still composed of the same by-products as in Comparative Examples 1 and 2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
85% | With hydrogenchloride; In isopropyl alcohol; at 80℃; for 3h; | 3-Chloro-2,4-difluoroaniline (1.7 g, 10.1 mmol) and 5N hydrogen chloride in isopropanol (2 ml) were added to a suspension of tert-butyl 4- [ (4-CHLORO-7- METHOXYQUINAZOLIN-6-YL) OXY] PIPERIDINE-1-CARBOXYLATE (4 g, 10.1 mmol, PCT Int. Appl. W02003082831, AstraZeneca) in isopropanol (50 ml). The mixture was stirred at 80C for 3 hours. After evaporation of the solvents, the residue was purified by chromatography on silica gel (eluant: 5-10% 7N methanolic ammonia in dichloromethane) to give 4- (3-CHLORO- 2, 4-DIFLUOROANILINO)-7-METHOXY-6-[(PIPERIDIN-4-YL) oxy] quinazoline (3.63 g, 85%) as a white solid. 'H NMR Spectrum : (CDCI3+ CD3CO2D) : 2.15 (m, 2H), 2.30 (m, 2H), 3.34 (m, 2H), 3.47 (m, 2H), 4.01 (s, 3H), 4.91 (m, 1H), 7.03 (m, 1H), 7.58 (m, 2H), 7.90 (s, 1H), 8.55 (s, 1H) ; Mass spectrum: MH+ 421. |
85% | With hydrogenchloride; In isopropyl alcohol; at 80℃; for 3h; | 3-CHLORO-2, 4-DIFLUOROANILINE (1.7 g, 10.1 mmol) and 5N hydrogen chloride in isopropanol (2 ml) were added to a suspension of tert-butyl 4- [ (4-CHLORO-7-METHOXYQUINAZOLIN-6- yl) oxy] PIPERIDINE-1-CARBOXYLATE (4 g, 10.1 mmol, PCT Int. Appl. W02003082831, AstraZeneca) in isopropanol (50 ml). The mixture was stirred at 80C for 3 hours. After evaporation of the solvents, the residue was purified by chromatography on silica gel (eluant: 5-10% 7N methanolic ammonia in dichloromethane) to give 4- (3-CHLORO-2, 4-difluoroanilino) - 7-METHOXY-6-[(PIPERIDIN-4-YL) OXY] QUINAZOLINE (3.63 g, 85%) as a white solid. HNMR Spectrum: (CDC13 + CD3CO2D) : 2.15 (m, 2H), 2.30 (m, 2H), 3.34 (m, 2H), 3.47 (m, 2H), 4.01 (s, 3H), 4.91 (m, 1H), 7.03 (m, 1H), 7.58 (m, 2H), 7.90 (s, 1H), 8.55 (s, 1H) ; Mass spectrum: MH+ 421. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | With sodium hydroxide;palladium; In hydrogenchloride; methanol; water; | Example 7 88 ml of methanol, 44 ml of water, 0.2 g of palladium-on-charcoal containing 10% Pd and 0.04 mol of <strong>[2613-34-5]3-chloro-2,4-difluoroaniline</strong> are charged to the same reactor as that of Example 6. A hydrogen pressure is introduced in the reactor, which is heated to 90 C. The hydrogen pressure is kept constant at 1.9*106 Pa absolute at 90 C. During the reaction, sodium hydroxide is added in proportion as hydrochloric acid is given off until an amount is reached which is comparable with that used for a corresponding amount of chlorodifluoroaniline in Example 6. After a period of 3 hours, the degree of conversion of the <strong>[2613-34-5]3-chloro-2,4-difluoroaniline</strong> is 100% and the 2,4-difluoroaniline yield is 99%. The remainder of the conversion product (1%) is composed of 4-fluoroaniline and of traces of aniline. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In 1,4-dioxane; (2S)-N-methyl-1-phenylpropan-2-amine hydrate; trifluoroacetic anhydride; | 3-Chloro-2,4-difluoro-(trifluoroacetamido)benzene. To a solution of 10.5 g (64.3 mmol) of <strong>[2613-34-5]3-chloro-2,4-difluoroaniline</strong> in 25 mL of dioxane kept in an ice-bath was added dropwise 10 mL (14.8 g, 70.4 mmol) of trifluoroacetic anhydride. The solution was stirred at room temperature for 20 h. It was then added to 150 mL of ice-water and the mixture was stirred for 1 h. It was filtered, washed with water, and dried to leave an almost colorless solid 16.1 g (96%); mp 73-74 C.; 1 H NMR (CDCl3), 7.068 (m, 1), 7.976 (mb, 1), 8.146 (m, 1). | |
In 1,4-dioxane; (2S)-N-methyl-1-phenylpropan-2-amine hydrate; trifluoroacetic anhydride; | 3-Chloro-2,4-difluoro-(trifluoroacetamido)benzene To a solution of 10.5 g (64.3 mmol) of <strong>[2613-34-5]3-chloro-2,4-difluoroaniline</strong> in 25 mL of dioxane kept in an ice-bath was added dropwise 10 mL (14.8 g, 70.4 mmol) of trifluoroacetic anhydride. The solution was stirred at room temperature for 20 h. It was then added into 150 mL of ice-water and the mixture was stirred for 1 h. It was filtered and washed by water, and dried to leave almost colorless solid 16.1 g (96%), mp 73-74 C. 1 H NMR (CDCl3), 7.068 (m, 1), 7.976 (mb, 1), 8.146 (m, 1). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In hydrogenchloride; water; | 135 g of tin(II) chloride (dihydrate) was added in small fractions to a stirred suspension of 23 g of 3-chloro-2,4-difluoronitrobenzene in 110 cm3 of a 37% aqueous hydrochloric acid solution and 25 cm'of diethyl ether. After the addition, the mixture was heated for 30 minutes at a temperature in the region of 40 C. After cooling the reaction mass, the mixture was poured over 300 cm3 of water supplemented with 150 g of ice. The mixture was made highly alkaline by addition of caustic soda, and then extracted twice with 250 cm3 of chloroform. The extracts were combined, dried over magnesium sulphate, and then concentrated under reduced pressure (5 kPa) at a temperature in the region of 40 C. 17.4 g of 3-chloro-2,4-difluoroaniline was obtained in the form of a beige solid, which melted at 58 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
36% | With N-ethyl-N,N-diisopropylamine; for 24h;Heating / reflux; | A mixture of 2,4-dichloropyrimidine (6.0 g, 40.5 mmol), <strong>[2613-34-5]3-chloro-2,4-difluoroaniline</strong> (6.28 g, 38.5 mmol), diisopropylethylamine (9.16 ml, 52.7 mmol) and pentanol (20 ml) was refluxed for 24 hrs. After concentration under reduced pressure, the residue was dissolved in ethyl acetate and the solution washed with water, dried and concentrated. The crude material was triturated in methylene chloride and the white solid collected by filtration to give 2.1 g of the desired product. The filtrate was concentrated and purified on silica gel (10 to 50% EtOAc in petroleum ether) to give another 1.9 g of material (total yield 4.0 g, 36%). NMR Spectrum (500 MHz, DMSOd6) 6.80 (d, IH), 7.38 (ddd, IH), 7.74 (ddd, IH), 8.21 (d, IH), 9.95 (bs, IH); Mass Spectrum MH+ 276. |
36% | With N-ethyl-N,N-diisopropylamine; In pentan-1-ol; for 24h;Heating / reflux; | 2-chloro-N-(3-chloro-2,4-difluoro-phenyl)pyrimidin-4-amineA mixture of 2,4-dichloropyrimidine (6.0 g, 40.5 mmol), <strong>[2613-34-5]3-chloro-2,4-difluoroaniline</strong> (6.28 g, 38.5 mmol), diisopropylethylamine (9.16 ml, 52.7 mmol) and pentanol (20 ml) was refluxed for 24 hours. After concentration under reduced pressure, the residue was dissolved in ethyl acetate and the solution washed with water, dried and concentrated. The crude material was triturated in methylene chloride and the white solid collected by <n="60"/>filtration to give 2.1 g of the desired product. The filtrate was concentrated and purified on silica gel (10 to 50% EtOAc in petroleum ether) to give another 1.9 g of material (total yield 4.0 g, 36%). NMR Spectrum (500 MHz, DMSOd) 6.80 (d, IH), 7.38 (ddd, IH), 7.74 (ddd, IH), 8.21 (d, IH), 9.95 (bs, IH); Mass Spectrum MH+ 276. |