4-bromo-2-fluorobenzamide

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

Conditions: temp:85.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-Bromo-2-fluorobenzamide (9.53 g, 43.7 mmol) and N,N-dimethylformamide dimethylacetal (75.0 mL) were combined in a 500 mL round bottom flask and purged with nitrogen. The reaction was heated to reflux at 85° C. for 2 h. The resulting mixture was concentrated under reduced pressure and dried under vacuum to afford a yellow oil. The oil was suspended in concentrated acetic acid (75.0 mL) and cooled to 0° C. Hydrazine hydrate (21.88 g, 437 mmol) was added dropwise and the mixture was allowed to stir at rt for 5 h. The reaction was poured warm onto cold ice and extracted with dichloromethane (3×200 mL). Organic volatiles were removed under reduced pressure to afford 3-(4-bromo-2-fluorophenyl)-4H-1,2,4-triazole (7.20 g, 29.7 mmol, 68.1% yield) as a white solid. MS (ESI) m/z 241.9 [M]+, 243.9 [M+2]+. purged with nitrogen The reaction was heated The resulting mixture was concentrated under reduced pressure dried under vacuum to afford a yellow oil cooled to 0° C The reaction was poured warm onto cold ice extracted with dichloromethane (3×200 mL) Organic volatiles were removed under reduced pressure

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

Procedure: A solution of 4-bromo-2-fluorobenzonitrile (10.0 g, 50.0 mmol) in a 70 mL mixture of TFA (56.0 mL, 727 mmol)-sulfuric acid (14.0 mL, 263 mmol) (4:1 V/V) was stirred at 40° C. for 16 h. The reaction was poured while still warm over ice water. The product precipitated and the solid was filtered and dried to give 4-bromo-2-fluorobenzamide (9.53 g, 43.7 mmol, 87% yield) as a white solid. MS (ESI) m/z 218.1 [M]+, 220.1 [M+2]+. The reaction was poured The product precipitated the solid was filtered dried

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

Procedure: A solution of 4-bromo-2-fluorobenzonitrile (10.0 g, 50.0 mmol) in a 70 mL mixture of TFA (56.0 mL, 727 mmol)-sulfuric acid (14.0 mL, 263 mmol) (4:1 V/V) was stirred at 40° C. for 16 h. The reaction was poured while still warm over ice water. The product precipitated and the solid was filtered and dried to give 4-bromo-2-fluorobenzamide (9.53 g, 43.7 mmol, 87% yield) as a white solid. MS (ESI) m/z 218.1 [M]+, 220.1 [M+2]+. The reaction was poured The product precipitated the solid was filtered dried

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

Procedure: At 0° C., 1,1′-carbonyldiimidazole (8.8 g, 54.3 mmol) was added in portions to a stirred mixture of 4-bromo-2-fluorobenzoic acid (6 g, 27.3 mmol) in dichloromethane (100 ml). After 20 minutes, a clear solution was obtained. Ammonium hydroxide (28%, 30 ml) was added and the mixture was stirred overnight. Aqueous layer was isolated, extracted with dichloromethane twice. Combined organic extracts were washed with water, 1 N HCl twice, water, brine and dried (MgSO4). Solvent was removed under vacuum, and the solid was washed with hexane to afford 4-bromo-2-fluoro-benzamide 2BL (5.56 g). a clear solution was obtained Aqueous layer was isolated extracted with dichloromethane twice Combined organic extracts were washed with water, 1 N HCl twice water, brine and dried (MgSO4) Solvent was removed under vacuum the solid was washed with hexane

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

Procedure: At 0° C., 1,1′-carbonyldiimidazole (8.8 g, 54.3 mmol) was added in portions to a stirred mixture of 4-bromo-2-fluorobenzoic acid (6 g, 27.3 mmol) in dichloromethane (100 ml). After 20 minutes, a clear solution was obtained. Ammonium hydroxide (28%, 30 ml) was added and the mixture was stirred overnight. Aqueous layer was isolated, extracted with dichloromethane twice. Combined organic extracts were washed with water, 1 N HCl twice, water, brine and dried (MgSO4). Solvent was removed under vacuum, and the solid was washed with hexane to afford 4-bromo-2-fluoro-benzamide 2BL (5.56 g). a clear solution was obtained Aqueous layer was isolated extracted with dichloromethane twice Combined organic extracts were washed with water, 1 N HCl twice water, brine and dried (MgSO4) Solvent was removed under vacuum the solid was washed with hexane

Conditions: temp:85.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-Bromo-2-fluorobenzamide (9.53 g, 43.7 mmol) and N,N-dimethylformamide dimethylacetal (75.0 mL) were combined in a 500 mL round bottom flask and purged with nitrogen. The reaction was heated to reflux at 85° C. for 2 h. The resulting mixture was concentrated under reduced pressure and dried under vacuum to afford a yellow oil. The oil was suspended in concentrated acetic acid (75.0 mL) and cooled to 0° C. Hydrazine hydrate (21.88 g, 437 mmol) was added dropwise and the mixture was allowed to stir at rt for 5 h. The reaction was poured warm onto cold ice and extracted with dichloromethane (3×200 mL). Organic volatiles were removed under reduced pressure to afford 3-(4-bromo-2-fluorophenyl)-4H-1,2,4-triazole (7.20 g, 29.7 mmol, 68.1% yield) as a white solid. MS (ESI) m/z 241.9 [M]+, 243.9 [M+2]+. purged with nitrogen The reaction was heated The resulting mixture was concentrated under reduced pressure dried under vacuum to afford a yellow oil cooled to 0° C The reaction was poured warm onto cold ice extracted with dichloromethane (3×200 mL) Organic volatiles were removed under reduced pressure

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

Procedure: A solution of 4-bromo-2-fluorobenzonitrile (10.0 g, 50.0 mmol) in a 70 mL mixture of TFA (56.0 mL, 727 mmol)-sulfuric acid (14.0 mL, 263 mmol) (4:1 VAT) was stirred at 40° C. for 16 h. The reaction was poured while still warm over ice water. The product precipitated and the solid was filtered and dried to give 4-bromo-2-fluorobenzamide (9.53 g, 43.7 mmol, 87% yield) as a white solid. MS (ESI) m/z 218.1 [M]+, 220.1 [M+2]+. The reaction was poured The product precipitated the solid was filtered dried

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

Procedure: A solution of 4-bromo-2-fluorobenzonitrile (10.0 g, 50.0 mmol) in a 70 mL mixture of TFA (56.0 mL, 727 mmol)-sulfuric acid (14.0 mL, 263 mmol) (4:1 VAT) was stirred at 40° C. for 16 h. The reaction was poured while still warm over ice water. The product precipitated and the solid was filtered and dried to give 4-bromo-2-fluorobenzamide (9.53 g, 43.7 mmol, 87% yield) as a white solid. MS (ESI) m/z 218.1 [M]+, 220.1 [M+2]+. The reaction was poured The product precipitated the solid was filtered dried

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

Procedure: Following the General Procedure-3, the titled compound (55 mg) was prepared from Intermediate 16 (360 mg, 0.87 mmol) and 4-bromo-2-fluorobenzamide (190 mg, 0.87 mmol) as an off-white solid. M.P.: 178-181° C. MS (m/z): 425.45 [M+H]+.

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

Procedure: Following the General Procedure-3, the titled compound (25 mg) was prepared from Intermediate 8 (150 mg, 0.35 mmol) and 4-bromo-2-fluorobenzamide (77 mg, 0.35 mmol) as a white solid. M.P.: 202-206° C. 1H-NMR (δ ppm, DMSO-d6, 400 MHz): 8.22 (t, J 8.3, 1H), 7.89 (s, 1H), 7.59-7.49 (m, 3H), 7.37 (dd, J 1.6, 13.24, 1H), 6.71 (d, J 9.5, 1H), 5.85 (s, 1H), 4.15 (d, J 10.7, 2H), 3.20-3.10 (m, 1H), 3.00 (t, J 11.8, 2H), 2.20-2.12 (m, 2H), 1.99-1.85 (m, 2H), 1.48 (s, 9H).

Conditions: temp:97.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-Bromo-2-fluorobenzamide (0.5 g, 2.29 mmol), 2 aminoisobutyric acid (0.354 g, 3.54 mmol), CuI (87 mg, 0.458 mmol), and K2CO3 (0.790 g, 5.72 mmol) were mixed in DMF (5 mL). H2O (0.5 mL) and TEA (11 mg, 0.1 mmol) were added followed by 2-acetyl cyclohexanone (60 mg, 0.428 mmol). The reaction mixture was heated to 95-100° C. for 48 h. The reaction mixture was diluted with H2O (20 mL) and the aqueous layer was washed with ethyl acetate (20 mL). The aqueous layer was acidified with 1M citric acid to pH 4 and the product was extracted with ethyl acetate (20 mL×3). The combined organic layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure to obtain the product. 1H NMR (DMSO, Freebase): δ (ppm) 7.55-7.45 (t, 1H), 7.20 (bs, 1H), 7.05 (bs, 1H), 6.80 (bs, 1H), 6.35-6.30 (d, 1H), 6.18-6.10 (d, 1H), 1.42 (s, 6H). the aqueous layer was washed with ethyl acetate (20 mL) the product was extracted with ethyl acetate (20 mL×3) The combined organic layer was dried over anhydrous Na2SO4 concentrated under reduced pressure to obtain the product