4-amino-2-fluoro-N,N-dimethylbenzamide

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

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

Procedure: To a 100 mL round bottom flask, 4-amino-2-fluoro-N,N-dimethyl-benzamide (2.5 g, 0.0137 mol), 4-bromophenylisocyanate (3.3 g, 0.0164), TEA (3.9 mL, 0.0274 mol) and DCM (50 mL) was added. The reaction mixture was stirred at room temperature for 12 h. After 12 h, the precipitate was formed and was collected by filtration. The solid was washed with diethyl ether and dried to get the title compound [3.0 g, 58%]. Calculated mass: 379.0; Observed mass: 380.0 (RT: 1.46 min). This compound was directly taken to the next step. After 12 h the precipitate was formed was collected by filtration The solid was washed with diethyl ether dried

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

Procedure: To a 100 mL round bottom flask, 4-amino-2-fluoro-N,N-dimethyl-benzamide (2.5 g, 0.0137 mol), 4-bromophenylisocyanate (3.3 g, 0.0164), TEA (3.9 mL, 0.0274 mol) and DCM (50 mL) was added. The reaction mixture was stirred at room temperature for 12 h. After 12 h, the precipitate was formed and was collected by filtration. The solid was washed with diethyl ether and dried to get the title compound [3.0 g, 58%]. Calculated mass: 379.0; Observed mass: 380.0 (RT: 1.46 min). This compound was directly taken to the next step. After 12 h the precipitate was formed was collected by filtration The solid was washed with diethyl ether dried

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

Procedure: To a 50 mL round bottom flask was added 2-fluoro-N,N-dimethyl-4-nitro benzamide (2.8 g, 0.0132 mol) and EtOH (20 mL). To the same flask, SnCl2.2H2O (11.9 g, 0.0528 mol) was added and the reaction mixture was maintained at 85° C. for 2 h. The reaction mass was cooled to room temperature and the volatiles were evaporated under reduced pressure. The residue was dissolved in water and ethyl acetate. Aqueous saturated sodium bicarbonate was added to adjust to a pH of 7.0. The reaction mixture was filtered through a pad of Celite® reagent and washed with ethyl acetate. The organic layer was separated, dried over anhydrous sodium sulfate and evaporated under reduced pressure to obtain the title compound [2.5 g, 100%]. 1H NMR (300 MHz, CDCl3): δ 7.21 (t, J=7.8 Hz, 1H), 6.46 (dd, J′=8.4 Hz, J″=2.4 Hz, 1H), 6.34 (d, J′=11.4 Hz, J″=1.8 Hz, 1H), 3.95 (brs, 2H), 3.08 (s, 3H), 2.95 (d, J=1.8 Hz, 3H); LC-MS (ESI): Calculated mass: 182.1; Observed mass: 183.1 (RT: 0.17 min). The reaction mass was cooled to room temperature the volatiles were evaporated under reduced pressure The residue was dissolved in water Aqueous saturated sodium bicarbonate was added The reaction mixture was filtered through a pad of Celite® reagent washed with ethyl acetate The organic layer was separated dried over anhydrous sodium sulfate evaporated under reduced pressure

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

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

Procedure: To a 100 mL round bottom flask, 4-amino-2-fluoro-N,N-dimethyl-benzamide (2.5 g, 0.0137 mol), 4-bromophenylisocyanate (3.3 g, 0.0164), TEA (3.9 mL, 0.0274 mol) and DCM (50 mL) was added. The reaction mixture was stirred at room temperature for 12 h. After 12 h, the precipitate was formed and was collected by filtration. The solid was washed with diethyl ether and dried to get the title compound [3.0 g, 58%]. Calculated mass: 379.0; Observed mass: 380.0 (RT: 1.46 min). This compound was directly taken to the next step. After 12 h the precipitate was formed was collected by filtration The solid was washed with diethyl ether dried

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

Procedure: To a 50 mL round bottom flask was added 2-fluoro-N,N-dimethyl-4-nitro benzamide (2.8 g, 0.0132 mol) and EtOH (20 mL). To the same flask, SnCl2.2H2O (11.9 g, 0.0528 mol) was added and the reaction mixture was maintained at 85° C. for 2 h. The reaction mass was cooled to room temperature and the volatiles were evaporated under reduced pressure. The residue was dissolved in water and ethyl acetate. Aqueous saturated sodium bicarbonate was added to adjust to a pH of 7.0. The reaction mixture was filtered through a pad of Celite® reagent and washed with ethyl acetate. The organic layer was separated, dried over anhydrous sodium sulfate and evaporated under reduced pressure to obtain the title compound [2.5 g, 100%]. 1H NMR (300 MHz, CDCl3): δ 7.21 (t, J=7.8 Hz, 1H), 6.46 (dd, J′=8.4 Hz, J″=2.4 Hz, 1H), 6.34 (d, J′=11.4 Hz, J″=1.8 Hz, 1H), 3.95 (brs, 2H), 3.08 (s, 3H), 2.95 (d, J=1.8 Hz, 3H); LC-MS (ESI): Calculated mass: 182.1; Observed mass: 183.1 (RT: 0.17 min). The reaction mass was cooled to room temperature the volatiles were evaporated under reduced pressure The residue was dissolved in water Aqueous saturated sodium bicarbonate was added The reaction mixture was filtered through a pad of Celite® reagent washed with ethyl acetate The organic layer was separated dried over anhydrous sodium sulfate evaporated under reduced pressure

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

Procedure: To a 100 mL round bottom flask, 4-amino-2-fluoro-N,N-dimethyl-benzamide (2.5 g, 0.0137 mol), 4-bromophenylisocyanate (3.3 g, 0.0164), TEA (3.9 mL, 0.0274 mol) and DCM (50 mL) was added. The reaction mixture was stirred at room temperature for 12 h. After 12 h, the precipitate was formed and was collected by filtration. The solid was washed with diethyl ether and dried to get the title compound [3.0 g, 58%]. Calculated mass: 379.0; Observed mass: 380.0 (RT: 1.46 min). This compound was directly taken to the next step. After 12 h the precipitate was formed was collected by filtration The solid was washed with diethyl ether dried

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

Procedure: To a 50 mL round bottom flask was added 2-fluoro-N,N-dimethyl-4-nitro benzamide (2.8 g, 0.0132 mol) and EtOH (20 mL). To the same flask, SnCl2.2H2O (11.9 g, 0.0528 mol) was added and the reaction mixture was maintained at 85° C. for 2 h. The reaction mass was cooled to room temperature and the volatiles were evaporated under reduced pressure. The residue was dissolved in water and ethyl acetate. Aqueous saturated sodium bicarbonate was added to adjust to a pH of 7.0. The reaction mixture was filtered through a pad of Celite® reagent and washed with ethyl acetate. The organic layer was separated, dried over anhydrous sodium sulfate and evaporated under reduced pressure to obtain the title compound [2.5 g, 100%]. 1H NMR (300 MHz, CDCl3): δ 7.21 (t, J=7.8 Hz, 1H), 6.46 (dd, J′=8.4 Hz, J″=2.4 Hz, 1H), 6.34 (d, J′=11.4 Hz, J″=1.8 Hz, 1H), 3.95 (brs, 2H), 3.08 (s, 3H), 2.95 (d, J=1.8 Hz, 3H); LC-MS (ESI): Calculated mass: 182.1; Observed mass: 183.1 (RT: 0.17 min). The reaction mass was cooled to room temperature the volatiles were evaporated under reduced pressure The residue was dissolved in water Aqueous saturated sodium bicarbonate was added The reaction mixture was filtered through a pad of Celite® reagent washed with ethyl acetate The organic layer was separated dried over anhydrous sodium sulfate evaporated under reduced pressure