3-chloro-1,3-dihydroindol-2-one

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Pyridine (1.51 mL, 18.76 mmol) and thionyl chloride (1.03 mL, 14.07 mmol) were added to a solution of 5-chloro-3-(2,4-dimethoxyphenyl)-3-hydroxy-1,3-dihydroindol-2-one (prepared as described in WO 2005/030755, 3.00 g, 9.38 mmol) in dichloromethane (70 mL) while cooling in ice. The reaction mixture was then stirred at 0° C. for 1 hour. While stirring, water was added to the reaction mixture, and it was then extracted with dichloromethane. The organic phase was washed with water and saturated brine, dried over sodium sulfate and concentrated under reduced pressure. 1-Pyridin-4-yl-piperazine (2.17 g, 13.31 mmol) was added to a solution of the 3-chloro-oxindole intermediate obtained in this way in dimethylformamide (25 mL), and the reaction mixture was stirred at room temperature for 12 h. The reaction mixture was concentrated under reduced pressure and the residue was partitioned between ethyl acetate and water. The aqueous phase was extracted again with ethyl acetate. The combined organic phase was dried over sodium sulfate and concentrated under reduced pressure, resulting in 1.00 g of the title compound which was employed without further purification in the next step. while cooling in ice While stirring was then extracted with dichloromethane The organic phase was washed with water and saturated brine dried over sodium sulfate concentrated under reduced pressure the reaction mixture was stirred at room temperature for 12 h The reaction mixture was concentrated under reduced pressure the residue was partitioned between ethyl acetate and water The aqueous phase was extracted again with ethyl acetate The combined organic phase was dried over sodium sulfate concentrated under reduced pressure

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Pyridine (1.51 mL, 18.76 mmol) and thionyl chloride (1.03 mL, 14.07 mmol) were added to a solution of 5-chloro-3-(2,4-dimethoxyphenyl)-3-hydroxy-1,3-dihydroindol-2-one (prepared as described in WO 2005/030755, 3.00 g, 9.38 mmol) in dichloromethane (70 mL) while cooling in ice. The reaction mixture was then stirred at 0° C. for 1 hour. While stirring, water was added to the reaction mixture, and it was then extracted with dichloromethane. The organic phase was washed with water and saturated brine, dried over sodium sulfate and concentrated under reduced pressure. 1-Pyridin-4-yl-piperazine (2.17 g, 13.31 mmol) was added to a solution of the 3-chloro-oxindole intermediate obtained in this way in dimethylformamide (25 mL), and the reaction mixture was stirred at room temperature for 12 h. The reaction mixture was concentrated under reduced pressure and the residue was partitioned between ethyl acetate and water. The aqueous phase was extracted again with ethyl acetate. The combined organic phase was dried over sodium sulfate and concentrated under reduced pressure, resulting in 1.00 g of the title compound which was employed without further purification in the next step. while cooling in ice While stirring was then extracted with dichloromethane The organic phase was washed with water and saturated brine dried over sodium sulfate concentrated under reduced pressure the reaction mixture was stirred at room temperature for 12 h The reaction mixture was concentrated under reduced pressure the residue was partitioned between ethyl acetate and water The aqueous phase was extracted again with ethyl acetate The combined organic phase was dried over sodium sulfate concentrated under reduced pressure

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Pyridine (0.18 mL, 2.24 mmol) and thionyl chloride (0.16 mL, 2.24 mmol) were added to a solution of 5-chloro-3-hydroxy-3-(2-methoxyphenyl)-1,3-dihydro-indol-2-one (WO 2005/030755, 0.50 g, 1.73 mmol) in dichloromethane (40 mL) with ice cooling, and stirred for 45 min at 0° C. The reaction solution was quenched with water, while stirring, and the preparation was extracted with dichloromethane. The organic phase was washed with water and saturated sodium chloride solution, dried over sodium sulphate and concentrated at reduced pressure. N,N-diisopropylethylamine (0.81 mL, 4.66 mmol) and 1-pyridin-3-yl-piperazine, HCl salt (0.34 g, 1.73 mmol) were added to a solution of the 3-chloro-oxindole intermediate thus obtained in dichloromethane/THF (20 mL) and the reaction mixture was stirred for 12 h at room temperature. The reaction mixture was concentrated at reduced pressure and the residue was distributed between ethyl acetate and water. The aqueous phase was extracted with ethyl acetate again. The combined organic phase was dried over sodium sulphate and concentrated at reduced pressure, and was used further without additional purification. Yield: 0.62 g. The reaction solution was quenched with water while stirring the preparation was extracted with dichloromethane The organic phase was washed with water and saturated sodium chloride solution dried over sodium sulphate concentrated at reduced pressure the reaction mixture was stirred for 12 h at room temperature The reaction mixture was concentrated at reduced pressure The aqueous phase was extracted with ethyl acetate again The combined organic phase was dried over sodium sulphate concentrated at reduced pressure was used further without additional purification

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Pyridine (1.51 mL, 18.76 mmol) and thionyl chloride (1.03 mL, 14.07 mmol) were added to a solution of 5-chloro-3-(2,4-dimethoxyphenyl)-3-hydroxy-1,3-dihydroindol-2-one (prepared as described in WO 2005/030755, 3.00 g, 9.38 mmol) in dichloromethane (70 mL) while cooling in ice. The reaction mixture was then stirred at 0° C. for 1 hour. While stirring, water was added to the reaction mixture, and it was then extracted with dichloromethane. The organic phase was washed with water and saturated brine, dried over sodium sulfate and concentrated under reduced pressure. 1-Pyridin-4-yl-piperazine (2.17 g, 13.31 mmol) was added to a solution of the 3-chloro-oxindole intermediate obtained in this way in dimethylformamide (25 mL), and the reaction mixture was stirred at room temperature for 12 h. The reaction mixture was concentrated under reduced pressure and the residue was partitioned between ethyl acetate and water. The aqueous phase was extracted again with ethyl acetate. The combined organic phase was dried over sodium sulfate and concentrated under reduced pressure, resulting in 1.00 g of the title compound which was employed without further purification in the next step. while cooling in ice While stirring was then extracted with dichloromethane The organic phase was washed with water and saturated brine dried over sodium sulfate concentrated under reduced pressure the reaction mixture was stirred at room temperature for 12 h The reaction mixture was concentrated under reduced pressure the residue was partitioned between ethyl acetate and water The aqueous phase was extracted again with ethyl acetate The combined organic phase was dried over sodium sulfate concentrated under reduced pressure