4-iodo-1,3-dihydroindol-2-one

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

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

Procedure: A mixture of concentrated sulfuric acid (0.73 mL) and concentrated nitric acid (0.14 mL) was added slowly to a solution of 1,3-dihydro-4-iodo-2H-indol-2-one (0.5 g, 1.93 mmol) (see Fukuyama et al., supra) in concentrated sulfuric acid (6 mL) at −5° C. with stirring. The mixture was stirred for an additional 15 min at −5° C. then poured into ice. After standing for 1 h, solid was collected by filtration and washed with water, and dried in a vacuum oven to give the above product. (Yield 0.46 g, 78%). The mixture was stirred for an additional 15 min at −5° C. then poured into ice solid was collected by filtration washed with water dried in a vacuum oven to give the above product

Conditions: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 1,3-dihydro-4-iodo-2H-indol-2-one (404.1 mg, 1.56 mmol) (see Fukuyama et al., supra) and pyrrole-2-carboxaldehyde (163.2 mg, 1.72 mmol) (Aldrich) in 2-propanol (6.2 mL) was treated with 2 drops of piperidine. The reaction mixture was heated at reflux for 24 h and then allowed to cool to 23° C., at which time, the reaction mixture was filtered. The solid was washed several times with cold distilled water and then allowed to air dry to provide pure (Z)-1,3-dihydro-4-iodo-3-[(1H-pyrrol-2-yl)methylene]-2H-indol-2-one (341.8 mg, 65%) as a yellow solid which was used without further purification. (MP 256-258° C.). The reaction mixture was heated at reflux for 24 h the reaction mixture was filtered The solid was washed several times with cold distilled water to air dry

Conditions: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 1,3-dihydro-4-iodo-2H-indol-2-one (404.1 mg, 1.56 mmol) (prepared according to T. Fukuyama et al., supra) and pyrrole-2-carboxaldehyde (163.2 mg, 1.72 mmol) (Aldrich) in 2-propanol (6.2 mL) was treated with 2 drops of piperidne (Aldrich). The reaction mixture was heated at reflux for 24 h and then allowed to cool to 23° C., at which time, the reaction mixture was filtered. The solid was washed several times with cold distilled water and then allowed to air dry to provide pure (Z)-1,3-dihydro-4-iodo-3-[(1H-pyrrol-2-yl)methylene]-indol-2-one. (Yield 341.8 mg, 65%) as a yellow solid, which was used without further purification. was treated with 2 drops of piperidne (Aldrich) The reaction mixture was heated at reflux for 24 h the reaction mixture was filtered The solid was washed several times with cold distilled water to air dry

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

Procedure: A mixture of concentrated sulfuric acid (0.73 mL) and concentrated nitric acid (0.14 mL) was added slowly to a solution of 1,3-dihydro-4-iodo-2H-indol-2-one (0.5 g, 1.93 mmol) (see T. Fukuyama, supra, and Kende, supra) in concentrated sulfuric acid (6 mL) at −5° C. with stirring. The mixture was stirred for an additional 15 min at −5° C. then poured into ice. After standing for 1 h, solid was collected by filtration and washed with water, and dried in a vacuum oven to give 1,3-dihydro-4-iodo-5-nitro-2H-indol-2-one. (Yield 0.46 g, 78%). The mixture was stirred for an additional 15 min at −5° C. then poured into ice solid was collected by filtration washed with water dried in a vacuum oven

Conditions: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 1,3-dihydro-4-iodo-2H-indol-2-one (404.1 mg, 1.56 mmol) (prepared according to T. Fukuyama et al., supra) and pyrrole-2-carboxaldehyde (163.2 mg, 1.72 mmol) (Aldrich) in 2-propanol (6.2 mL) was treated with 2 drops of piperidne (Aldrich). The reaction mixture was heated at reflux for 24 h and then allowed to cool to 23° C., at which time, the reaction mixture was filtered. The solid was washed several times with cold distilled water and then allowed to air dry to provide pure (Z)-1,3-dihydro-4-iodo-3-[(1H-pyrrol-2-yl)methylene]-indol-2-one. (Yield 341.8 mg, 65%) as a yellow solid, which was used without further purification. was treated with 2 drops of piperidne (Aldrich) The reaction mixture was heated at reflux for 24 h the reaction mixture was filtered The solid was washed several times with cold distilled water to air dry

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

Procedure: A mixture of concentrated sulfuric acid (0.73 mL) and concentrated nitric acid (0.14 mL) was added slowly to a solution of 1,3-dihydro-4-iodo-2H-indol-2-one (0.5 g, 1.93 mmol) (see T. Fukuyama, supra, and Kende, supra) in concentrated sulfuric acid (6 mL) at -5° C. with stirring. The mixture was stirred for an additional 15 min at -5° C. then poured into ice. After standing for 1 h, solid was collected by filtration and washed with water, and dried in a vacuum oven to give 1,3-dihydro-4-iodo-5-nitro-2H-indol-2-one. (Yield 0.46 g, 78%). The mixture was stirred for an additional 15 min at -5° C. then poured into ice solid was collected by filtration washed with water dried in a vacuum oven

Conditions: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 1,3-dihydro-4-iodo-2H-indol-2-one (404.1 mg, 1.56 mmol) (prepared according to T. Fukuyama et al., supra) and pyrrole-2-carboxaldehyde (163.2 mg, 1.72 mmol) (Aldrich) in 2-propanol (6.2 mL) was treated with 2 drops of piperidne (Aldrich). The reaction mixture was heated at reflux for 24 h and then allowed to cool to 23° C., at which time, the reaction mixture was filtered. The solid was washed several times with cold distilled water and then allowed to air dry to provide pure (Z)-1,3-dihydro-4-iodo-3-[(1H-pyrrol-2-yl)methylene]-indol-2-one. (Yield 341.8 mg, 65%) as a yellow solid, which was used without further purification. was treated with 2 drops of piperidne (Aldrich) The reaction mixture was heated at reflux for 24 h the reaction mixture was filtered The solid was washed several times with cold distilled water to air dry

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

Procedure: A mixture of concentrated sulfuric acid (0.73 mL) and concentrated nitric acid (0.14 mL) was added slowly to a solution of 1,3-dihydro-4-iodo-2H-indol-2-one (0.5 g, 1.93 mmol) (see T. Fukuyama, supra, and Kende, supra) in concentrated sulfuric acid (6 mL) at −5° C. with stirring. The mixture was stirred for an additional 15 min at −5° C. then poured into ice. After standing for 1 h, solid was collected by filtration and washed with water, and dried in a vacuum oven to give 1,3-dihydro-4-iodo-5-nitro-2H-indol-2-one. (Yield 0.46 g, 78%). The mixture was stirred for an additional 15 min at −5° C. then poured into ice solid was collected by filtration washed with water dried in a vacuum oven

Conditions: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 4-iodooxindole (404.1 mg, 1.56 mmol) (see Fukuyama, supra) and pyrrole-2-carboxaldehyde (163.2 mg, 1.72 mmol) (Aldrich) in 2-propanol (6.2 mL) was treated with 2 drops of piperidne. The reaction mixture was heated at reflux for 24 h and then allowed to cool to 23° C., at which time, the reaction mixture was filtered. The solid was washed several times with cold distilled water and then allowed to air dry to provide pure (Z)-1,3-dihydro-4-iodo-3-[(1H-pyrrol-2-yl)methylene]-2H-indol-2-one (341.8 mg, 65%) as a yellow solid which was used without further purification: was treated with 2 drops of piperidne The reaction mixture was heated at reflux for 24 h the reaction mixture was filtered The solid was washed several times with cold distilled water to air dry

Conditions: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 4-iodooxindole (404.1 mg, 1.56 mmol) (see Fukuyama, supra) and pyrrole-2-carboxaldehyde (163.2 mg, 1.72 mmol) (Aldrich) in 2-propanol (6.2 mL) was treated with 2 drops of piperidne. The reaction mixture was heated at reflux for 24 h and then allowed to cool to 23° C., at which time, the reaction mixture was filtered. The solid was washed several times with cold distilled water and then allowed to air dry to provide pure (Z)-1,3-dihydro-4-iodo-3-[(1H-pyrrol-2-yl)methylene]-2H-indol-2-one (341.8 mg, 65%) as a yellow solid which was used without further purification: was treated with 2 drops of piperidne The reaction mixture was heated at reflux for 24 h the reaction mixture was filtered The solid was washed several times with cold distilled water to air dry

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

Procedure: A mixture of concentrated sulfuric acid (0.73 mL) and concentrated nitric acid (0.14 mL) was added slowly to a solution of 1,3-dihydro-4-iodo-2H-indol-2-one (0.5 g, 1.93 mmol) (see Fukuyama, supra) in concentrated sulfuric acid (6 mL) at −5° C., with stirring. The mixture was stirred for an additional 15 min at −5° C., then poured onto ice. After standing for 1 h, solid was collected by filtration and washed with water, and dried in a vacuum oven to give 1,3-dihydro-4-iodo-5-nitro-2H-indol-2-one. (Yield 0.46 g, 78%). The mixture was stirred for an additional 15 min at −5° C. poured onto ice solid was collected by filtration washed with water dried in a vacuum oven