O-(4-fluorophenyl)hydroxylamine;hydrochloride

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

Procedure: A solution of N-(2-acetyl-5-trifluoromethylphenyl)trifluoromethanesulfonamide 35 (280 mg, 0.84 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (150 mg, 0.92 mmol) and anhydrous NaOAc (75 mg, 0.92 mmol) in EtOH (15 mL) was stirred for 24 hours at RT. The reaction mixture was concentrated under vacuum, the residue purified by column chromatography (eluting with CH2Cl2/PE; 1:1 to 4:1) and the solvent removed under reduced pressure. Recrystallization from CH2Cl2/PE afforded N-{2-[1-(4-fluorophenoxyimino)ethyl]-5-trifluoromethylphenyl}trifluoromethanesulfonamide 200 (300 mg, 81%), as colorless crystals. M.p. 95-96° C. 1H n.m.r. (200 MHz, CDCl3) δ 11.48, br s, 1H; 8.01, s, 1H; 7.76, d, J=8.4 Hz, 1H; 7.55, m, 1H; 7.19-7.04, m, 4H; 2.60, s, 3H. The reaction mixture was concentrated under vacuum the residue purified by column chromatography (eluting with CH2Cl2/PE; 1:1 to 4:1) the solvent removed under reduced pressure Recrystallization from CH2Cl2/PE

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

Procedure: A solution of N-(2-acetyl-5-trifluoromethylphenyl)trifluoromethanesulfonamide 35 (280 mg, 0.84 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (150 mg, 0.92 mmol) and anhydrous NaOAc (75 mg, 0.92 mmol) in EtOH (15 mL) was stirred for 24 hours at RT. The reaction mixture was concentrated under vacuum, the residue purified by column chromatography (eluting with CH2Cl2/PE; 1:1 to 4:1) and the solvent removed under reduced pressure. Recrystallization from CH2Cl2/PE afforded N-{2-[1-(4-fluorophenoxyimino)ethyl]-5-trifluoromethylphenyl}trifluoromethanesulfonamide 200 (300 mg, 81%), as colorless crystals. M.p. 95-96° C. 1H n.m.r. (200 MHz, CDCl3) δ 11.48, br s, 1H; 8.01, s, 1H; 7.76, d, J=8.4 Hz, 1H; 7.55, m, 1H; 7.19-7.04, m, 4H; 2.60, s, 3H. The reaction mixture was concentrated under vacuum the residue purified by column chromatography (eluting with CH2Cl2/PE; 1:1 to 4:1) the solvent removed under reduced pressure Recrystallization from CH2Cl2/PE

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

Procedure: A solution of N-(4-chloro-2-cyclohexanecarbonylphenyl)trifluoromethanesulfonamide 29E (410 mg, 1.11 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (200 mg, 1.22 mmol) and anhydrous NaOAc (100 mg, 1.22 mmol) in EtOH (20 mL) was stirred for 15 hours at RT. The reaction mixture was concentrated under vacuum and the residue purified by column chromatography (eluting with CH2Cl2/PE, 3:7 to CH2Cl2) to afford N-{4-chloro-2-[(4-flurophenoxyimino)cyclohexylmethyl]phenyl}trifluoromethanesulfonamide 169 (200 mg, 38%), as a white solid. 1H n.m.r. (200 MHz, CDCl3) δ 7.54, d, J=8.8 Hz, 1H; 7.43, dd, J=2.2 and 8.8 Hz, 1H; 7.24, d, J=2.2 Hz, 1H; 7.12-6.95, m, 5H; 2.56, m, 1H; 2.14, m, 1H; 1.93-1.65, m, 5H; 1.29, m, 4H. The reaction mixture was concentrated under vacuum the residue purified by column chromatography (eluting with CH2Cl2/PE, 3:7 to CH2Cl2)

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

Procedure: A solution of N-[4-chloro-2-(2,2-dimethylpropionyl)phenyl]trifluoromethanesulfonamide 29C (280 mg, 0.82 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (200 mg, 1.22 mmol) and anhydrous NaOAc (100 mg, 1.22 mmol) in EtOH (20 mL) was stirred for 48 hours at RT. The reaction mixture was concentrated under vacuum and the residue purified by column chromatography (eluting with CH2Cl2/PE, 1:4 to 2:3) to afford N-{4-chloro-2-[1-(4-fluorophenoxyimino)2,2-dimethylpropyl]phenyl}trifluoromethanesulfonamide 198 (40 mg, 11%), as an orange oil. 1H n.m.r. (200 MHz, CDCl3) δ 7.52, d, J=8.8 Hz, 1H; 7.42, dd, J=2.2 and 8.8 Hz, 1H; 7.19, d, J=2.2 Hz, 1H; 7.00, m, 4H; 6.49, br s, 1H; 1.32, s, 9H. HRMS (M+) 452.0576. The reaction mixture was concentrated under vacuum the residue purified by column chromatography (eluting with CH2Cl2/PE, 1:4 to 2:3)

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

Procedure: A solution of N-[4-chloro-2-(2,2-dimethylpropionyl)phenyl]trifluoromethanesulfonamide 29C (280 mg, 0.82 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (200 mg, 1.22 mmol) and anhydrous NaOAc (100 mg, 1.22 mmol) in EtOH (20 mL) was stirred for 48 hours at RT. The reaction mixture was concentrated under vacuum and the residue purified by column chromatography (eluting with CH2Cl2/PE, 1:4 to 2:3) to afford N-{4-chloro-2-[1-(4-fluorophenoxyimino)2,2-dimethylpropyl]phenyl}trifluoromethanesulfonamide 198 (40 mg, 11%), as an orange oil. 1H n.m.r. (200 MHz, CDCl3) δ 7.52, d, J=8.8 Hz, 1H; 7.42, dd, J=2.2 and 8.8 Hz, 1H; 7.19, d, J=2.2 Hz, 1H; 7.00, m, 4H; 6.49, br s, 1H; 1.32, s, 9H. HRMS (M+) 452.0576. The reaction mixture was concentrated under vacuum the residue purified by column chromatography (eluting with CH2Cl2/PE, 1:4 to 2:3)

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

Procedure: A solution of N-(4-chloro-2-propionylphenyl)trifluoromethanesulfonamide 22 (386 mg, 1.22 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (200 mg, 1.22 mmol) and anhydrous NaOAc (110 mg, 1.34 mmol) in EtOH (18 mL) was stirred for 15 hours at RT. The reaction mixture was concentrated under vacuum and the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2). The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4) to afford N-{4-chloro-2-[1-(4-fluorophenoxyimino)propyl]phenyl}trifluoromethanesulfonamide 130 (420 mg, 81%), as a pale yellow solid. M.p. 47-48° C. 1H n.m.r. (200 MHz, CDCl3) δ 11.25, br s, 1H; 7.71, d, J=8.8 Hz, 1H; 7.58, d, J=2.4 Hz, 1H; 7.40, dd, J=2.4 and 8.8 Hz, 1H; 7.18-7.02, m, 4H; 3.02, q, J=7.6 Hz, 2H; 1.31, t, J=7.6 Hz, 3H. The reaction mixture was concentrated under vacuum the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2) The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4)

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

Procedure: A solution of N-(4-chloro-2-propionylphenyl)trifluoromethanesulfonamide 22 (386 mg, 1.22 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (200 mg, 1.22 mmol) and anhydrous NaOAc (110 mg, 1.34 mmol) in EtOH (18 mL) was stirred for 15 hours at RT. The reaction mixture was concentrated under vacuum and the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2). The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4) to afford N-{4-chloro-2-[1-(4-fluorophenoxyimino)propyl]phenyl}trifluoromethanesulfonamide 130 (420 mg, 81%), as a pale yellow solid. M.p. 47-48° C. 1H n.m.r. (200 MHz, CDCl3) δ 11.25, br s, 1H; 7.71, d, J=8.8 Hz, 1H; 7.58, d, J=2.4 Hz, 1H; 7.40, dd, J=2.4 and 8.8 Hz, 1H; 7.18-7.02, m, 4H; 3.02, q, J=7.6 Hz, 2H; 1.31, t, J=7.6 Hz, 3H. The reaction mixture was concentrated under vacuum the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2) The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4)

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

Procedure: A solution of N-(2-acetyl-4-chlorophenyl)trifluoromethanesulfonamide 19 (350 mg, 1.16 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (190 mg, 1.16 mmol) and anhydrous NaOAc (104 mg, 1.27 mmol) in EtOH (16 mL) was stirred for 15 h at RT. The reaction mixture was concentrated under vacuum, the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2) and the solvent removed under reduced pressure. The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4) to afford N-{4-chloro-2-[1-(4-fluorophenoxyimino)ethyl]phenyl}trifluoromethanesulfonamide 129 (458 mg, 96%), as a pale yellow solid. M.p. 71-73° C. 1H n.m.r. (200 MHz, CDCl3) δ 11.23, br s, 1H; 7.69, d, J=9.0 Hz, 1H; 7.59, d, J=2.4 Hz, 1H; 7.40, dd, J=2.4 and 9.0 Hz, 1H; 7.18-7.03, m, 4H; 2.55, s, 3H. The reaction mixture was concentrated under vacuum the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2) the solvent removed under reduced pressure The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4)

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

Procedure: A solution of N-(2-acetyl-5-trifluoromethylphenyl)trifluoromethanesulfonamide 35 (280 mg, 0.84 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (150 mg, 0.92 mmol) and anhydrous NaOAc (75 mg, 0.92 mmol) in EtOH (15 mL) was stirred for 24 hours at RT. The reaction mixture was concentrated under vacuum, the residue purified by column chromatography (eluting with CH2Cl2/PE; 1:1 to 4:1) and the solvent removed under reduced pressure. Recrystallization from CH2Cl2/PE afforded N-{2-[1-(4-fluorophenoxyimino)ethyl]-5-trifluoromethylphenyl}trifluoromethanesulfonamide 200 (300 my, 81%), as colorless crystals. M.p. 95-96° C. 1H n.m.r. (200 MHz, CDCl3) δ 11.48, br s, 1H, 8.01, s, 1H, 7.76, d, J=8.4 Hz, 1H, 7.55, m, 1H, 7.19-7.04, m, 4H, 2.60, s, 3H. The reaction mixture was concentrated under vacuum the residue purified by column chromatography (eluting with CH2Cl2/PE; 1:1 to 4:1) the solvent removed under reduced pressure Recrystallization from CH2Cl2/PE

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

Procedure: A solution of N-(4-chloro-2-cyclohexanecarbonylphenyl)trifluoromethanesulfonamide 29E (410 mg, 1.11 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (200 mg, 1.22 mmol) and anhydrous NaOAc (100 mg, 1.22 mmol) in EtOH (20 mL) was stirred for 15 hours at RT. The reaction mixture was concentrated under vacuum and the residue purified by column chromatography (eluting with CH2Cl2/PE, 3:7 to CH2Cl2) to afford N-{4-chloro-2-[(4-fluorophenoxyimino)cyclohexylmethyl]phenyl}trifluoromethanesulfonamide 169 (200 mg, 38%), as a white solid. 1H n.m.r. (200 MHz, CDCl3) δ 7.54, d, J=8.8 Hz, 1H, 7.43, dd, J=2.2 and 8.8 Hz, 1H; 7.24, d, J=2.2 Hz, 1H, 7.12-6.95, m, 5H, 2.56, m, 1H, 2.14, m, 1H, 1.93-1.65, m, 5H, 1.29, m, 4H. The reaction mixture was concentrated under vacuum the residue purified by column chromatography (eluting with CH2Cl2/PE, 3:7 to CH2Cl2)

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

Procedure: A solution of N-(4-chloro-2-propionylphenyl)trifluoromethanesulfonamide 22 (386 mg, 1.22 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (200 mg, 1.22 mmol) and anhydrous NaOAc (110 mg, 1.34 mmol) in EtOH (18 mL) was stirred for 15 hours at RT. The reaction mixture was concentrated under vacuum and the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2). The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4) to afford N-{4-chloro-2-[1-(4-fluorophenoxyimino)propyl]phenyl}trifluoromethanesulfonamide 130 (420 mg, 81%), as a pale yellow solid. M.p. 47-48° C. 1H n.m.r. (200 MHz, CDCl3) δ 11.25, br s, 1H, 7.71, d, J=8.8 Hz, 1H, 7.58, d, J=2.4 Hz, 1H, 7.40, dd, J=2.4 and 8.8 Hz, 1H, 7.18-7.02, m, 4H, 3.02, q, J=7.6 Hz, 2H, 1.31, t, J=7.6 Hz, 3H. The reaction mixture was concentrated under vacuum the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2) The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4)

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

Procedure: A solution of N-(4-chloro-2-propionylphenyl)trifluoromethanesulfonamide 22 (386 mg, 1.22 mmol), O-(4-fluorophenyl)hydroxylamine hydrochloride (200 mg, 1.22 mmol) and anhydrous NaOAc (110 mg, 1.34 mmol) in EtOH (18 mL) was stirred for 15 hours at RT. The reaction mixture was concentrated under vacuum and the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2). The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4) to afford N-{4-chloro-2-[1-(4-fluorophenoxyimino)propyl]phenyl}trifluoromethanesulfonamide 130 (420 mg, 81%), as a pale yellow solid. M.p. 47-48° C. 1H n.m.r. (200 MHz, CDCl3) δ 11.25, br s, 1H, 7.71, d, J=8.8 Hz, 1H, 7.58, d, J=2.4 Hz, 1H, 7.40, dd, J=2.4 and 8.8 Hz, 1H, 7.18-7.02, m, 4H, 3.02, q, J=7.6 Hz, 2H, 1.31, t, J=7.6 Hz, 3H. The reaction mixture was concentrated under vacuum the residue filtered through a pad of silica (eluting with CH2Cl2/PE, 3:2) The residue was purified by radial thin layer chromatography (eluting with CH2Cl2/PE, 1:4)