(4-bromo-2-fluorophenyl)-morpholin-4-ylmethanone

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: A solution of 3.8 ml (44 mmol) oxalyl chloride in 30 ml CH2Cl2 is added dropwise to a iced-cooled solution of 4.88 g (21.9 mmol) 4-bromo-2-fluorobenzoic acid in 180 ml CH2Cl2. After complete addition, the cooling bath is removed and stirring maintained for 15 h at RT. The solvent is evaporated to dryness, the resultant colorless residue is dried under vacuum and then diluted with 80 ml CH2Cl2. This solution of 2-Fluoro-4-bromobenzoyl chloride (CAS 151982-51-3) is then added dropwise to a mixture of 9.55 ml (54.7 mmol) of diisopropylethylamine, 2.01 ml (23 mmol) of morpholine in 100 ml CH2Cl2. After 1 h 30, the reaction mixture is diluted with water and the two phases are separated. The aqueous phase is re-extracted with CH2Cl2 and the combined organic extracts are washed with water, saturated brine, dried over Na2SO4, filtered and the filtrate is concentrated in vacuo to afford, after drying in HV, the title compound which is used in the next step without further purification. After complete addition the cooling bath is removed The solvent is evaporated to dryness the resultant colorless residue is dried under vacuum diluted with 80 ml CH2Cl2 the two phases are separated The aqueous phase is re-extracted with CH2Cl2 the combined organic extracts are washed with water, saturated brine dried over Na2SO4 filtered the filtrate is concentrated in vacuo to afford after drying in HV the title compound which is used in the next step without further purification

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

Procedure: A solution of 3.8 ml (44 mmol) oxalyl chloride in 30 ml CH2Cl2 is added dropwise to a iced-cooled solution of 4.88 g (21.9 mmol) 4-bromo-2-fluorobenzoic acid in 180 ml CH2Cl2. After complete addition, the cooling bath is removed and stirring maintained for 15 h at RT. The solvent is evaporated to dryness, the resultant colorless residue is dried under vacuum and then diluted with 80 ml CH2Cl2. This solution of 2-Fluoro-4-bromobenzoyl chloride (CAS 151982-51-3) is then added dropwise to a mixture of 9.55 ml (54.7 mmol) of diisopropylethylamine, 2.01 ml (23 mmol) of morpholine in 100 ml CH2Cl2. After 1 h 30, the reaction mixture is diluted with water and the two phases are separated. The aqueous phase is re-extracted with CH2Cl2 and the combined organic extracts are washed with water, saturated brine, dried over Na2SO4, filtered and the filtrate is concentrated in vacuo to afford, after drying in HV, the title compound which is used in the next step without further purification. After complete addition the cooling bath is removed The solvent is evaporated to dryness the resultant colorless residue is dried under vacuum diluted with 80 ml CH2Cl2 the two phases are separated The aqueous phase is re-extracted with CH2Cl2 the combined organic extracts are washed with water, saturated brine dried over Na2SO4 filtered the filtrate is concentrated in vacuo to afford after drying in HV the title compound which is used in the next step without further purification

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

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

Procedure: 4-[(4-Bromo-2-fluorophenyl)carbonyl]morpholine (5.06 g, 17.6 mmol, 1.00 equiv) was dissolved in 150 mL of THF and the resultant solution was cooled to 0° C. Methyl magnesium bromide (17.6 mL, 3.0 M in Et2O, 52.7 mmol, 3.00 equiv) was added over 5 minutes via syringe. The reaction mixture was maintained for 30 minutes, an additional portion of methyl magnesium bromide was added (10 mL, 29.9 mmol, 1.70 equiv) and the reaction mixture was allowed to warm to room temperature. After an additional 1.5 h, the reaction mixture was poured into saturated NH4Cl. The mixture was diluted with EtOAc and the phases were separated. The organic phase was washed with 1N HCl, saturated NaHCO3, and saturated NaCl, then dried over Na2SO4, filtered and concentrated en vacuo. The resulting residue was purified by column chromatography (40 g SiO2, 0→10% EtOAc/Hexanes) to afford 2.59 g (68%) of a colorless oil. 1H NMR (CDCl3) δ 7.79 (t, J=8.2 Hz, 1H), 7.42-7.36 (m, 2H), 2.66 (d, J=5.0 Hz, 3H). The reaction mixture was maintained for 30 minutes the phases were separated The organic phase was washed with 1N HCl, saturated NaHCO3, and saturated NaCl dried over Na2SO4 filtered concentrated en vacuo The resulting residue was purified by column chromatography (40 g SiO2, 0→10% EtOAc/Hexanes)

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

Procedure: 4-[(4-Bromo-2-fluorophenyl)carbonyl]morpholine (5.06 g, 17.6 mmol, 1.00 equiv) was dissolved in 150 mL of THF and the resultant solution was cooled to 0° C. Methyl magnesium bromide (17.6 mL, 3.0 M in Et2O, 52.7 mmol, 3.00 equiv) was added over 5 minutes via syringe. The reaction mixture was maintained for 30 minutes, an additional portion of methyl magnesium bromide was added (10 mL, 29.9 mmol, 1.70 equiv) and the reaction mixture was allowed to warm to room temperature. After an additional 1.5 h, the reaction mixture was poured into saturated NH4Cl. The mixture was diluted with EtOAc and the phases were separated. The organic phase was washed with 1N HCl, saturated NaHCO3, and saturated NaCl, then dried over Na2SO4, filtered and concentrated en vacuo. The resulting residue was purified by column chromatography (40 g SiO2, 0→10% EtOAc/Hexanes) to afford 2.59 g (68%) of a colorless oil. 1H NMR (CDCl3) δ 7.79 (t, J=8.2 Hz, 1H), 7.42-7.36 (m, 2H), 2.66 (d, J=5.0 Hz, 3H). The reaction mixture was maintained for 30 minutes the phases were separated The organic phase was washed with 1N HCl, saturated NaHCO3, and saturated NaCl dried over Na2SO4 filtered concentrated en vacuo The resulting residue was purified by column chromatography (40 g SiO2, 0→10% EtOAc/Hexanes)

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

Procedure: 4-Bromo-2-fluorobenzoic acid (5.00 g, 22.8 mmol, 1.00 equiv) and EDC (5.23 g, 27.4 mmol, 1.20 equiv) were dissolved in dichloromethane (100 mL). Morpholine (4.77 mL, 54.8 mmol, 2.40 equiv) was added and the solution was maintained at room temperature for 19 h. The reaction mixture was concentrated en vacuo and diluted with EtOAc and 1N HCl. The phases were separated and the organic phase was washed sequentially with water, saturated NaHCO3, and saturated NaCl. The organic phase was subsequently dried over Na2SO4, filtered and concentrated to afford 5.06 g (81%) of a colorless oil which was used without further purification in the next step. MS (ES) m/e 289 [M+H]+. The reaction mixture was concentrated en vacuo diluted with EtOAc and 1N HCl The phases were separated the organic phase was washed sequentially with water, saturated NaHCO3, and saturated NaCl The organic phase was subsequently dried over Na2SO4 filtered concentrated

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

Procedure: 4-Bromo-2-fluorobenzoic acid (5.00 g, 22.8 mmol, 1.00 equiv) and EDC (5.23 g, 27.4 mmol, 1.20 equiv) were dissolved in dichloromethane (100 mL). Morpholine (4.77 mL, 54.8 mmol, 2.40 equiv) was added and the solution was maintained at room temperature for 19 h. The reaction mixture was concentrated en vacuo and diluted with EtOAc and 1N HCl. The phases were separated and the organic phase was washed sequentially with water, saturated NaHCO3, and saturated NaCl. The organic phase was subsequently dried over Na2SO4, filtered and concentrated to afford 5.06 g (81%) of a colorless oil which was used without further purification in the next step. MS (ES) m/e 289 [M+H]+. The reaction mixture was concentrated en vacuo diluted with EtOAc and 1N HCl The phases were separated the organic phase was washed sequentially with water, saturated NaHCO3, and saturated NaCl The organic phase was subsequently dried over Na2SO4 filtered concentrated