3-methoxy-1H-pyrrole-2-carbaldehyde

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

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

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

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

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

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

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

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: tert-Butyl 5,6-dihydro-5-oxo-4H-thieno[2,3-b]pyrrole-2-carboxylate (915 mg, 3.8 mmol) was dissolved in a solution of 1% piperidine in 2-propanol (10 ml). 3-Methoxypyrrole-2-carboxaldehyde (3.8 mmol, 480 mg) was added in one portion and the mixture heated at 75° C. for 1 hour. The reaction mixture was poured into an ice/water mixture (15 ml) and the precipitated solid was collected by filtration and washed with water to give 530 mg of tert-butyl (Z)-5,6-dihydro-4-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-oxo-4H-thieno [2,3-b]pyrrole-2-carboxylate as a red solid. MS(ES): m/e 347 [M+H]. the precipitated solid was collected by filtration washed with water

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

Procedure: 1,3-Dihydro-4-fluoro-5-nitro-2H-indol-2-one (5.25 g, 26.8 mmol) (Starting Material 9) was suspended in 110 mL solution of 1.35% piperidine in 2-propanol (Aldrich). 3-Methoxy-2-pyrrolecarboxaldehyde (3.68 g, 29.4 mmol, 1.1 eq.)(Bellamy, supra) was added and this mixture heated at 60° C. for 3.5 hours (TLC: 50% ethyl acetate in hexanes). The reaction mixture was poured into 1 L ice and water mixture and the solid precipitate filtered, washed with water and dried at 50° C. under high vacuum to give (Z)-1,3-dihydro-4-fluoro-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-5-nitro-2H-indol-2-one as an orange-brown solid. (Yield 6.6 g, 81%). the solid precipitate filtered washed with water dried at 50° C. under high vacuum

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

Procedure: 3-Methoxypyrrole-2-carboxaldehyde (13 mg, 0.105 mmol) (Bellamy, supra) and 2-phenyl-6,8-dihydro-thiazolo[5,4-e]indol-7-one (20 mg, 0.075 mmol) (from Example 5) were suspended in a solution of 10% piperidine in 2-propanol (1 mL). The mixture was heated at reflux for 3 h. The mixture was cooled, poured into water, and the aqueous mixture was made acidic with concentrated hydrochloric acid. The aqueous layer was extracted with ethyl acetate, and the combined organic extracts were washed with water, brine, and dried over anhydrous magnesium sulfate. The solvent was removed in vacuo, and the crude product was purified by reverse phase HPLC using acetonitrile-water as solvent. (Yield 10 mg, 36%). The mixture was heated at reflux for 3 h The mixture was cooled The aqueous layer was extracted with ethyl acetate the combined organic extracts were washed with water, brine dried over anhydrous magnesium sulfate The solvent was removed in vacuo the crude product was purified by reverse phase

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

Procedure: 3-Methoxypyrrole-2-carboxaldehyde (13 mg, 0.105 mmol)(Bellamy, supra) and 2-phenyl-6,8-dihydro-oxazolo[5,4-e]-indol-7-one (17 mg, 0.068 mmol)(Starting Material 4) were suspended in a solution of 10% piperidine (Aldrich) in 2-propanol (1 mL). The mixture was heated at reflux for 2 h. The mixture was cooled, poured into water, and the aqueous mixture was made acidic with concentrated hydrochloric acid. The aqueous layer was extracted with ethyl acetate, and the combined organic extracts were washed with water, brine, and dried over anhydrous magnesium sulfate. The solvent was removed in vacuo and the crude product was purified by reverse phase HPLC using acetonitrile-water as solvent. (Yield 10 mg, 41%). The mixture was heated at reflux for 2 h The mixture was cooled The aqueous layer was extracted with ethyl acetate the combined organic extracts were washed with water, brine dried over anhydrous magnesium sulfate The solvent was removed in vacuo the crude product was purified by reverse phase

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3-Methoxypyrrole-2-carboxaldehyde (11 mg, 0.088 mmol)(Bellamy, supra), piperidine (3 drops)(Aldrich), and 2-phenyl-6,8-dihydro-thiazolo[4,5-e]indol-7-one (21.4 mg, 0.08 mmol) (Example 3) were dissolved in DMF (3 mL). The mixture was heated to 90° C. and stirred at that temperature for 1 h. The mixture was cooled, poured into water, and acidified with concentrated hydrochloric acid. The mixture was extracted with ethyl acetate, and the combined organic extracts were washed with water, brine, and dried over anhydrous magnesium sulfate. The solvent was concentrated under reduced pressure, and the crude product was purified by reverse phase HPLC using acetonitrile-water as solvent, then crystallization from ethanol. (Yield 4.5 mg, 15%). The mixture was cooled The mixture was extracted with ethyl acetate the combined organic extracts were washed with water, brine dried over anhydrous magnesium sulfate The solvent was concentrated under reduced pressure the crude product was purified by reverse phase crystallization from ethanol