6-fluoro-5-methyl-1H-indole-2,3-dione

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Add of N-(3-Fluoro-4-methyl-phenyl)-2-hydroxyimino-acetamide (2.96 g, 15.10 mmol) in small portions at 65° C. to concentrated sulfuric acid (15 mL) and heat the mixture at 80° C. for 10 minutes. Cool to room temperature, pour into ice water (100 mL) and filter the precipitate and wash with water. Dry the solid to yield 4-Fluoro-5-methyl-1H-indole-2,3-dione and 6-Fluoro-5-methyl-1H-indole-2,3-dione. Cool to room temperature filter the precipitate wash with water Dry the solid

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Add of N-(3-Fluoro-4-methyl-phenyl)-2-hydroxyimino-acetamide (2.96 g, 15.10 mmol) in small portions at 65° C. to concentrated sulfuric acid (15 mL) and heat the mixture at 80° C. for 10 minutes. Cool to room temperature, pour into ice water (100 mL) and filter the precipitate and wash with water. Dry the solid to yield 4-Fluoro-5-methyl-1H-indole-2,3-dione and 6-Fluoro-5-methyl-1H-indole-2,3-dione. Cool to room temperature filter the precipitate wash with water Dry the solid

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Add of N-(3-Fluoro-4-methyl-phenyl)-2-hydroxyimino-acetamide (2.96 g, 15.10 mmol) in small portions at 65° C. to concentrated sulfuric acid (15 mL) and heat the mixture at 80° C. for 10 minutes. Cool to room temperature, pour into ice water (100 mL) and filter the precipitate and wash with water. Dry the solid to yield 4-Fluoro-5-methyl-1H-indole-2,3-dione and 6-Fluoro-5-methyl-1H-indole-2,3-dione. Cool to room temperature filter the precipitate wash with water Dry the solid