3,3-dibromo-1,1,1-trifluorobutan-2-one

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluorobutanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluoro-butanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluorobutanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluorobutanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluorobutanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluorobutanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluorobutanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluoro-butanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried

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

Procedure: To a mixed solution of 8.0 g (97.2 mmol) of sodium acetate and about 50 ml of water was added under ice cooling 6.9 g (24.3 mmol) of 3,3-dibromo-1,1,1-trifluorobutanone, and the reaction was allowed to proceed at 80° C. for 30 minutes. Then, the reaction mixture was cooled to 0° C., to which 4.4 g (18.7 mmol) of 7-fluoro-6-hydrazino-4-propargyl-2H-1,4-benzoxazin-3-one was added, and the reaction mixture was stirred at room temperature for 2 hours. The precipitated crystals were collected by filtration, washed twice with 10 ml of water, and dried, which afforded 6.1 g (17.0 mmol) of 1,1,1-trifluoro-2,3-butandione 3-(7-fluoro-3-oxo-4-propargyl-2H-1,4-benzoxazin-6-ylhydrazone). was added The precipitated crystals were collected by filtration washed twice with 10 ml of water dried