4-bromo-2-fluoro-5-methylaniline

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-bromo-2-fluoro-5-methylaniline (500 mg, 2.45 mmoL) in THF (3 mL) was added the 2-fluoro-5-(trifluoromethyl)phenyl isocyanate (625 mg, 3.0 mmol). The reaction generated a white solid within 10 min. An additional portion of THF (3 mL) was added and the mixture dissolved. TLC analysis (1:1 Et2O:Hex) indicated that the reaction was complete. The product was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O). 1H-NMR (DMSO-d6) δ 9.37 (d, J=2.8 Hz, 1H), 9.17 (d, J=2.4 Hz, 1H), 8.61 (dd, J=7.2, 2 Hz, 1H), 8.19 (d, J=8.0 Hz, 1H), 7.55 (d, J=10.8 Hz, 1H), 7.49 (dd, J=10.8, 8.8 Hz, 2H), 7.39 (m, 1H), 2.29 (s, 3H); MS [M+H]+=409.3, LCMS RT=3.91 min. within 10 min the mixture dissolved The product was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-bromo-2-fluoro-5-methylaniline (500 mg, 2.45 mmoL) in THF (3 mL) was added the 2-fluoro-5-(trifluoromethyl)phenyl isocyanate (625 mg, 3.0 mmol). The reaction generated a white solid within 10 min. An additional portion of THF (3 mL) was added and the mixture dissolved. TLC analysis (1:1 Et2O:Hex) indicated that the reaction was complete. The product was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O). 1H-NMR (DMSO-d6) δ 9.37 (d, J=2.8 Hz, 1H), 9.17 (d, J=2.4 Hz, 1H), 8.61 (dd, J=7.2, 2 Hz, 1H), 8.19 (d, J=8.0 Hz, 1H), 7.55 (d, J=10.8 Hz, 1H), 7.49 (dd, J=10.8, 8.8 Hz, 2H), 7.39 (m, 1H), 2.29 (s, 3H); MS [M+H]+=409.3, LCMS RT=3.91 min. within 10 min the mixture dissolved The product was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of 2-fluoro-5-metylaniline (6.75 g, 54 mmol) and CaCO3 (10 g, 100 mmol) in CH2Cl2 (1 L) and MeOH (400 mL) was added a solution of Benzyltrimethylammonium tribromide (22.3 g, 57 mmol) in CH2Cl2 (180 mL) and MeOH (70 mL). The solution was added dropwise and the mixture was stirred over night. The solution was a light orange/tan color. The mixture was filtered and the solvent was removed under reduced pressure. The resulting slurry was diluted with H2O (100 mL) and extracted with Et2O (3×200 mL). The mixture was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O) to provide (9 g, 69.5% yield) the product as a white solid. 1H-NMR (DMSO-d6) δ 7.23 (d, J=10.8 Hz, 1H), 6.74 (d, J=10.8 Hz, 1H), 5.27 (s, 2H), 2.20 (s, 3H). The solution was added dropwise The mixture was filtered the solvent was removed under reduced pressure The resulting slurry was diluted with H2O (100 mL) extracted with Et2O (3×200 mL) The mixture was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-bromo-2-fluoro-5-methylaniline (500 mg, 2.45 mmol.) in THF (3 mL) was added the 2-fluoro-5-(trifluoromethyl)phenyl isocyanate (625 mg, 3.0 mmol). The reaction generated a white solid within 10 min. An additional portion of THF (3 mL) was added and the mixture dissolved. TLC analysis (1:1 Et2O:Hex) indicated that the reaction was complete. The product was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O). 1H-NMR (DMSO-d6) δ 9.37 (d, J=2.8 Hz, 1H), 9.17 (d, J=2.4 Hz, 1H), 8.61 (dd, J=7.2, 2 Hz, 1H), 8.19 (d, J=8.0 Hz, 1H), 7.55 (d, J=10.8 Hz, 1H), 7.49 (dd, J=10.8, 8.8 Hz, 2H), 7.39 (m, 1H), 2.29 (s, 3H); MS [M+H]+=409.3, LCMS RT=3.91 min. within 10 min the mixture dissolved The product was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of 2-fluoro-5-methylaniline (6.75 g, 54 mmol) and CaCO3 (10 g, 100 mmol) in CH2Cl2 (1 L) and MeOH (400 mL) was added a solution of Benzyltrimethylammonium tribromide (22.3 g, 57 mmol) in CH2Cl2 (180 mL) and MeOH (70 mL). The solution was added dropwise and the mixture was stirred over night. The solution was a light orange/tan color. The mixture was filtered and the solvent was removed under reduced pressure. The resulting slurry was diluted with H2O (100 mL) and extracted with Et2O (3×200 mL). The mixture was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O) to provide (9 g, 69.5% yield) the product as a white solid. 1H-NMR (DMSO-d6) δ 7.23 (d, J=10.8 Hz, 1H), 6.74 (d, J=10.8 Hz, 1H), 5.27 (s, 2H), 2.20 (s, 3H). The solution was added dropwise The mixture was filtered the solvent was removed under reduced pressure The resulting slurry was diluted with H2O (100 mL) extracted with Et2O (3×200 mL) The mixture was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a slurry of 2-fluoro-5-methylaniline (6.75 g, 54 mmol) and CaCO3 (10 g, 100 mmol) in CH2Cl2 (1 L) and MeOH (400 mL) was added a solution of Benzyltrimethylammonium tribromide (22.3 g, 57 mmol) in CH2Cl2 (180 mL) and MeOH (70 mL). The solution was added dropwise and the mixture was stirred over night. The solution was a light orange/tan color. The mixture was filtered and the solvent was removed under reduced pressure. The resulting slurry was diluted with H2O (100 mL) and extracted with Et2O (3×200 mL). The mixture was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O) to provide (9 g, 69.5% yield) the product as a white solid. 1H-NMR (DMSO-d6) δ 7.23 (d, J=10.8 Hz, 1H), 6.74 (d, J=10.8 Hz, 1H), 5.27 (s, 2H), 2.20 (s, 3H). The solution was added dropwise The mixture was filtered the solvent was removed under reduced pressure The resulting slurry was diluted with H2O (100 mL) extracted with Et2O (3×200 mL) The mixture was purified by flash column chromatography (Hex:Et2O 2:1 to Et2O)