Structure of 4-Chloro-2-fluoroaniline
CAS No.: 57946-56-2
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CAS No. : | 57946-56-2 |
Formula : | C6H5ClFN |
M.W : | 145.56 |
SMILES Code : | C1=C(C(=CC=C1Cl)N)F |
MDL No. : | MFCD00010625 |
InChI Key : | CSFDTBRRIBJILD-UHFFFAOYSA-N |
Pubchem ID : | 93898 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302+H312+H332-H315-H319-H335 |
Precautionary Statements: | P261-P280-P305+P351+P338 |
* 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 |
---|---|---|
98% | With silver(II) sulfate; iodine; In ethanol; at 20℃; for 2h; | Step 1: synthesis of 4-chloro-2-fluoro-6-iodoaniline To a solution of 4-chloro-2-fluoroaniline (1.15 g, 7.9 mmol) in 125 mL of ethanol added silversulphate (1.7 g, 8.3 mmol), then followed by addition of ?2 (2.1 g, 8.3 mmol) in portions. Afterthe addition was completed, the mixture was stirred at RT for 2 hours. The mixture was filtered through celite and the filtration was evaporated to give dark oil which was dissolved in 125 mL of DCM. The solution was washed with 2M sodium hydroxide (40 mL x 2), saturated Na25203 (40 mL x 2) and water (40 mL x 2). The resulting solution was dried over Mg504 and thenevaporated to give the crude 4-chloro-2-fluoro-6-iodoaniline as dark oil (2.1 g, yield: 98%). |
87% | With iodine; silver sulfate; In ethanol; at 20℃; for 1.5h; | 4-Chloro-2-fluoroaniline (2.9 g, 20 mmol) was dissolved in ethanol (200 mL). Silver sulphate (6.22 g, 20 mmol) was added and then iodine (5.08 g, 20 mmol) was added in small portions. After the addition was complete the reaction mixture was stirred at ambient temperature for 90min. The reaction mixture was filtered through Celite and evaporated to leave a dark oil which was taken up in DCM (200 mL). and washed with 2M sodium hydroxide (2 x 50 mL), saturated sodium thiosulphate (2x50 mL) and water (2x50 mL). The solution was dried (MgSO4) and evaporated to leave the title compound as a dark oil (4.73g, 87%).1H NMR (400 MHz, DMSO-d6) delta 5.30 (2H, s), 7.25 - 7.29 (IH, m), 7.47 (IH, t) |
40% | With iodine; silver sulfate; In ethanol; at 20℃; for 2h; | To a solution of 4-chloro-2-fluoroaniline (2 g, 14 mmol) in EtOH (40 mL) was added Ag2S04 (12.9 g, 42 mmol), followed by the addition of I2 (10.5 g, 42 mmol). The reaction mixture was stirred at RT for 2 h and then filtered through Celite. The filtrate was evaporated to give a dark oil. The residue was dissolved in DCM (70 mL), washed with 2M NaOH (40 mL x 2), Na2S203 (40 mL x 2) and water (40 mL x 2). The resulting solution was dried over MgS04, filtered and concentrated. The residue was purified by column chromatography on silica gel (PE/EA = 5/1) to give 4-chloro-2-fluoro-6-iodoaniline (1.5 g, 40% yield) as a dark oil. 1H NMR (400 MHz, DMSO-i): d 7.47-7.46 (m, 1H), 7.28-7.25 (m, 1H), 5.31 (brs, 2H). |
With iodine; silver sulfate; In ethanol; at 20℃; for 2h; | Step 1: synthesis of 4-chloro-2-fluoro-6-iodoaniline To a solution of 4-chloro-2-fluoroaniline (1.15 g, 7.9 mmol) in 125 mL of ethanol added silver sulphate (1.7 g, 8.3 mmol), then followed by addition of I2 (2.1 g, 8.3 mmol) in portions. After the addition was completed, the mixture was stirred at RT for 2 hours. The mixture was filtered through celite and the filtration was evaporated to give dark oil which was dissolved in 125 mL of DCM. The solution was washed with 2M sodium hydroxide (40 mL*2), saturated Na2S2O3 (40 mL*2) and water (40 mL*2). The resulting solution was dried over MgSO4 and then evaporated to give the crude 4-chloro-2-fluoro-6-iodoaniline as dark oil (2.1 g, yield: 98%). | |
With iodine; silver sulfate; In ethanol; at 20℃; for 2h; | To a solution of 4-chloro-2-fluoroaniline (1.15 g, 7.9 mmol) in 125 mL of ethanol added silver sulphate (1.7 g, 8.3 mmol), then followed by addition of I2 (2.1 g, 8.3 mmol) in portions. After the addition was completed, the mixture was stirred at RT for 2 hours. The mixture was filtered through celite and the filtration was evaporated to give dark oil which was dissolved in 125 mL of DCM. The solution was washed with 2M sodium hydroxide (40 mL×2), saturated Na2S2O3 (40 mL×2) and water (40 mL×2). The resulting solution was dried over MgSO4 and then evaporated to give the crude 4-chloro-2-fluoro-6-iodoaniline as dark oil (2.1 g, yield: 98%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
3.0 g (43%) | With pyridine hydrochloride; In diethyl ether; 1-ethoxyethanol; | REFERENCE EXAMPLE 7 7-Bromo-4-(4-chloro-2-fluoroanilino)-3-quinolinecarbonitlile A mixture of <strong>[364793-57-7]7-bromo-4-chloro-3-quinolinecarbonitrile</strong> (5.0 g, 18.69 mmole), 4-chloro-2-fluoroaniline (3.27 g, 22.43 mmol) and pyridine hydrochloride (2.2 g, 18.69 mmol) in 150 mL of ethoxyethanol was heated at reflux for 4 hours. After cooling, the solvent was removed in vacuo and the residue was diluted with ice water, basified (pH 9) with ammonium hydroxide, and extracted into ethyl acetate. The extracts were washed with saturated sodium chloride, dried over sodium sulfate and concentrated. The residue was treated with diethyl ether, and the yellow solid was collected by filtration. The filtrate was concentrated and purified by flash silica gel chromatography eluding with methylene chloride: diethyl ether: methanol (9:1:0.1) to provide 3.0 g (43%) of 7-bromo-4-(4-chloro-2-fluoroanilino)-3-quinolinecarbonitrile as a light brown solid; H NMR (DMSO-d6) delta 7.38 d, J=9 Hz, 1H), 7.47-7.53 (m, 1H), 7.62 (dd, J=3, 9 Hz, 1H), 7.84 (d, J=9 Hz, 1H), 8.13 (s, 1H), 8.44 (d, J=9 Hz, 1H), 8.62 (s, 1H); MS (ES) m/z 377.7 (M+1). Analysis for C16H8 BrClFN3: Calcd: C, 51.03;H, 2.14; N, 11.16. Found: C, 50.67;H, 2.20; N, 11.02. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With pyridine hydrochloride; In 2-ethoxy-ethanol; | EXAMPLE 275 4-(4-Chloro-2-fluoro-phenylamino)-8-methoxy-quinoline-3-carbonitrile Using an analogous procedure to that described in Example 274. A reaction mixture of 328.0 mg (1.5 mmol) of <strong>[214476-78-5]4-chloro-8-methoxy-3-quinolinecarbonitrile</strong>, 173.3 mg (1.5 mmol) of pyridine hydrochloride and 240.0 mg (1.7 mmol) of 2-fluoro-4-chloro-aniline in 15 mL of 2-ethoxyethanol was heated at 100 C. for 2 hr. After the work up, 431.3 mg (87.9%) of the product was obtained as an off white solid, m.p. 127 C. (dec.), mass spectrum (electrospray, m/e): M+H 327.8, 329.9. | |
With pyridine hydrochloride; In 2-ethoxy-ethanol; | EXAMPLE 275 4-(4-Chloro-2-fluoro-phenylamino)-8-methoxy-quinoline-3-carbonitrile Using an analogous procedure to that described in Example 274. A reaction mixture of 328.0 mg (1.5 mmol) of 4-chloro-8-methoxy -3-quinolinecarbonitrile, 173.3 mg (1.5 mmol) of pyridine hydrochloride and 240.0 mg (1.7 mmol) of 2-fluoro-4-chloroaniline in 15 mL of 2-ethoxyethanol was heated at 100 C. for 2 hr. After the work up, 431.3 mg (87.9%) of the product was obtained as an off white solid, m.p. 127 C. (dec.), mass spectrum (electrospray, m/e): M+H 327.8, 329.9. | |
With pyridine hydrochloride; In 2-ethoxy-ethanol; | Example 275 4-(4-Chloro-2-fluoro-phenylamino)-8-methoxy-quinoline-3-carbonitrile Using an analogous procedure to that described in Example 274. A reaction mixture of 328.0 mg (1.5 mmol) of 4-chloro-8-methoxy -3-quinolinecarbonitrile, 173.3 mg (1.5 mmol) of pyridine hydrochloride and 240.0 mg (1.7 mmol) of 2-fluoro-4-chloro-aniline in 15 mL of 2-ethoxyethanol was heated at 100 C for 2 hr. After the work up, 431.3 mg (87.9%) of the product was obtained as an off white solid, m.p. 127 C (dec.), mass spectrum (electrospray, m/e): M+H 327.8, 329.9. |