1-(3-amino-1-benzofuran-2-yl)ethanone

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

Procedure: To a solution of 1A (114 mmol) in MeOH (200 mL) was added NaOH (18.2 g, 445 mmol). The reaction was exothermic. After cooled to room temperature, benzaldehyde (14.5 g, 137 mmol) was added. The mixture was stirred overnight under N2. TLC monitored the reaction. After the reaction completed, the reaction mixture was poured into ice-water under stirring. The solids precipitated out and were collected by filtration, and dried to give 1B (26 g). the reaction under stirring The solids precipitated out were collected by filtration dried

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-hydroxy-benzonitrile (1000 mmol) in DMF (dimethylformamide, 80 mL) was added K2CO3 (207 g, 1.5 mol) portionwise under stirring, followed by 1-chloro-propan-2-one (139 g, 1.5 mol). After addition, the mixture was heated to 120° C. and stirred at that temperature for 2 hours. TLC showed the reaction was completed. The reaction mixture was cooled to room temperature and filtered. The filtrate was extracted with ethyl acetate, washed with brine, dried and concentrated. The residue was washed with dichloromethane, filtered and dried to give 112 g of 1-(3-amino-benzofuran-2-yl)-ethanone (1A). After addition stirred at that temperature for 2 hours The reaction mixture was cooled to room temperature filtered The filtrate was extracted with ethyl acetate washed with brine dried concentrated The residue was washed with dichloromethane filtered dried

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-hydroxy-benzonitrile (1000 mmol) in DMF (dimethylformamide, 80 mL) was added K2CO3 (207 g, 1.5 mol) portionwise under stirring, followed by 1-chloro-propan-2-one (139 g, 1.5 mol). After addition, the mixture was heated to 120° C. and stirred at that temperature for 2 hours. TLC showed the reaction was completed. The reaction mixture was cooled to room temperature and filtered. The filtrate was extracted with ethyl acetate, washed with brine, dried and concentrated. The residue was washed with dichloromethane, filtered and dried to give 112 g of 1-(3-amino-benzofuran-2-yl)-ethanone (1A). After addition stirred at that temperature for 2 hours The reaction mixture was cooled to room temperature filtered The filtrate was extracted with ethyl acetate washed with brine dried concentrated The residue was washed with dichloromethane filtered dried

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

Procedure: To a solution of 1A (114 mmol) in MeOH (200 mL) was added NaOH (18.2 g, 445 mmol). The reaction was exothermic. After cooled to room temperature, benzaldehyde (14.5 g, 137 mmol) was added. The mixture was stirred overnight under N2. TLC monitored the reaction. After the reaction completed, the reaction mixture was poured into ice-water under stirring. The solids precipitated out and were collected by filtration, and dried to give 1B (26 g). the reaction under stirring The solids precipitated out were collected by filtration dried

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-hydroxy-benzonitrile (1000 mmol) in DMF (dimethylformamide, 80 mL) was added K2CO3 (207 g, 1.5 mol) portionwise under stirring, followed by 1-chloro-propan-2-one (139 g, 1.5 mol). After addition, the mixture was heated to 120° C. and stirred at that temperature for 2 hours. TLC showed the reaction was completed. The reaction mixture was cooled to room temperature and filtered. The filtrate was extracted with ethyl acetate, washed with brine, dried and concentrated. The residue was washed with dichloromethane, filtered and dried to give 112 g of 1-(3-amino-benzofuran-2-yl)-ethanone (1A). After addition stirred at that temperature for 2 hours The reaction mixture was cooled to room temperature filtered The filtrate was extracted with ethyl acetate washed with brine dried concentrated The residue was washed with dichloromethane filtered dried