6-amino-5-tert-butyl-3,3-dimethyl-1-benzofuran-2-one

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

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

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

Procedure: A reaction vessel was charged with compound 26 (2.926 g, 15.43 mmol), Compound 20 (4.32 g, 18.52 mmol), 2-MeTHF (35.99 mL), and subsequently 50% T3P in 2-MeTHF (13.36 g, 21.00 mmol). Pyridine (2.441 g, 2.496 mL, 30.86 mmol) was added and the suspension heated at 47.5° C.±5° C. for 18 h. After completion, the reaction was cooled to ambient temperature and 2-MeTHF (36) and water (30 ml) were added. The layers were split and the organic layer was washed with 10 wt % citric acid solution (30 ml), water (30 ml) and twice with NaHCO3 (20 ml). The organic layer was washed with brine (50 ml), separated and the solvent removed in vacuo. The crude product was dissolved in MTBE (100 ml) and hexane (200 ml) was added as an anti-solvent. A solid precipitated and the resulting slurry was stirred for two hours. The solid was collected by suction filtration and the cake was washed with hexane. The resulting product was dried in a vacuum oven at 55° C. with nitrogen bleed to give the title compound as a beige solid. 1H-NMR (400 MHZ, DMSO-d6) δ 12.96 (d J 6.4 Hz, 1H); 12.1 (s, 1H); 8.9 (d, J 6.4 Hz, 1H); 8.33 (d, J 8 Hz, 1H); 7.84-7.75 (m, 2H); 7.55-7.48 (m, 3H); 1.47 (s, 6H); 1.45 (s, 9H). the suspension heated at 47.5° C.±5° C. for 18 h The layers were split the organic layer was washed with 10 wt % citric acid solution (30 ml), water (30 ml) and twice with NaHCO3 (20 ml) The organic layer was washed with brine (50 ml) separated the solvent removed in vacuo The crude product was dissolved in MTBE (100 ml) hexane (200 ml) was added as an anti-solvent A solid precipitated The solid was collected by suction filtration the cake was washed with hexane The resulting product was dried in a vacuum oven at 55° C. with nitrogen

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

Procedure: Palladium on carbon (wet; 5 wt %) was placed into a round bottomed flask under nitrogen flow. 5-tert-butyl-3,3-dimethyl-6-nitro-benzofuran-2-one (4.7 g, 17.85 mmol) was then added to the vessel. Methanol (120 mL) was then carefully charged to the vessel under nitrogen atmosphere. The vessel was then purged with N2, evacuated, then charged with hydrogen gas. The vessel was evacuated and re-charged with hydrogen gas, and then a continuous hydrogen gas stream was introduced. After completion, the reaction was filtered through Celite® and the cake was washed with MeOH (300 ml). The solvent was removed in vacuo and the product dried under high vacuum to give a white crystalline solid. 1H-NMR (400 MHZ, DMSO-d6) δ 7.05 (s, 1H); 6.48 (s, 1H); 5.02 (s, 2H, NH2); 1.34 (s, 6H); 1.30 (s, 9H) The vessel was then purged with N2 evacuated charged with hydrogen gas The vessel was evacuated re-charged with hydrogen gas a continuous hydrogen gas stream was introduced After completion, the reaction was filtered through Celite® the cake was washed with MeOH (300 ml) The solvent was removed in vacuo the product dried under high vacuum to give a white crystalline solid

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

Procedure: Pd/C (1.50 g) and compound 19 (3.00 g, 1.14 mmol) were suspended in THF (1500 mL) at 25° C. under hydrogen at 30 psi for 4 hours. The mixture was then filtered through a pad of Celite®, and the filtrate was concentrated in vacuo to give compound 20 as a white solid. 1H NMR (DMSO-d6; 400 MHz) δ 7.05 (s), δ 6.49 (s), δ 5.01 (s), δ 1.35 (s), δ 1.33 (s). The mixture was then filtered through a pad of Celite® the filtrate was concentrated in vacuo

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

Procedure: Pd/C (1.50 g) and compound 19 (3.00 g, 1.14 mmol) were suspended in THF (1500 mL) at 25° C. under hydrogen at 30 psi for 4 hours. The mixture was then filtered through a pad of Celite®, and the filtrate was concentrated in vacuo to give compound 20 as a white solid. 1H NMR (DMSO-d6; 400 MHz) δ 7.05 (s), δ 6.49 (s), δ 5.01 (s), δ 1.35 (s), δ 1.33 (s). The mixture was then filtered through a pad of Celite® the filtrate was concentrated in vacuo

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

Procedure: A reaction vessel was charged with compound 26 (2.926 g, 15.43 mmol), Compound 20 (4.32 g, 18.52 mmol), 2-MeTHF (35.99 mL), and subsequently 50% T3P in 2-MeTHF (13.36 g, 21.00 mmol). Pyridine (2.441 g, 2.496 mL, 30.86 mmol) was added and the suspension heated at 47.5° C.±5° C. for 18 h. After completion, the reaction was cooled to ambient temperature and 2-MeTHF (36) and water (30 ml) were added. The layers were split and the organic layer was washed with 10 wt % citric acid solution (30 ml), water (30 ml) and twice with NaHCO3 (20 ml). The organic layer was washed with brine (50 ml), separated and the solvent removed in vacuo. The crude product was dissolved in MTBE (100 ml) and hexane (200 ml) was added as an anti-solvent. A solid precipitated and the resulting slurry was stirred for two hours. The solid was collected by suction filtration and the cake was washed with hexane. The resulting product was dried in a vacuum oven at 55° C. with nitrogen bleed to give the title compound as a beige solid. 1H-NMR (400 MHZ, DMSO-d6) δ 12.96 (d J 6.4 Hz, 1H); 12.1 (s, 1H); 8.9 (d, J 6.4 Hz, 1H); 8.33 (d, J=8 Hz, 1H); 7.84-7.75 (m, 2H); 7.55-7.48 (m, 3H); 1.47 (s, 6H); 1.45 (s, 9H). the suspension heated at 47.5° C.±5° C. for 18 h The layers were split the organic layer was washed with 10 wt % citric acid solution (30 ml), water (30 ml) and twice with NaHCO3 (20 ml) The organic layer was washed with brine (50 ml) separated the solvent removed in vacuo The crude product was dissolved in MTBE (100 ml) hexane (200 ml) was added as an anti-solvent A solid precipitated The solid was collected by suction filtration the cake was washed with hexane The resulting product was dried in a vacuum oven at 55° C. with nitrogen

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

Procedure: Palladium on carbon (wet; 5 wt %) was placed into a round bottomed flask under nitrogen flow. 5-Tert-butyl-3,3-dimethyl-6-nitro-benzofuran-2-one (4.7 g, 17.85 mmol) was then added to the vessel. Methanol (120 mL) was then carefully charged to the vessel under nitrogen atmosphere. The vessel was then purged with N2, evacuated, then charged with hydrogen gas. The vessel was evacuated and re-charged with hydrogen gas, and then a continuous hydrogen gas stream was introduced. After completion, the reaction was filtered through Celite® and the cake was washed with MeOH (300 ml). The solvent was removed in vacuo and the product dried under high vacuum to give a white crystalline solid. 1H-NMR (400 MHZ, DMSO-d6) δ 7.05 (s, 1H); 6.48 (s, 1H); 5.02 (s, 2H, NH2); 1.34 (s, 6H); 1.30 (s, 9H) The vessel was then purged with N2 evacuated charged with hydrogen gas The vessel was evacuated re-charged with hydrogen gas a continuous hydrogen gas stream was introduced After completion, the reaction was filtered through Celite® the cake was washed with MeOH (300 ml) The solvent was removed in vacuo the product dried under high vacuum to give a white crystalline solid

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

Procedure: Pd/C (1.50 g) and compound 19 (3.00 g, 1.14 mmol) were suspended in THF (1500 mL) at 25° C. under hydrogen at 30 psi for 4 hours. The mixture was then filtered through a pad of Celite®, and the filtrate was concentrated in vacuo to give compound 20 as a white solid. 1H NMR (DMSO-d6; 400 MHz) δ 7.05 (s), δ 6.49 (s), δ 5.01 (s), δ 1.35 (s), δ 1.33 (s). The mixture was then filtered through a pad of Celite® the filtrate was concentrated in vacuo

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

Procedure: Pd/C (1.50 g) and compound 19 (3.00 g, 1.14 mmol) were suspended in THF (1500 mL) at 25° C. under hydrogen at 30 psi for 4 hours. The mixture was then filtered through a pad of Celite®, and the filtrate was concentrated in vacuo to give compound 20 as a white solid. 1H NMR (DMSO-d6; 400 MHz) δ 7.05 (s), δ 6.49 (s), δ 5.01 (s), δ 1.35 (s), δ 1.33 (s). The mixture was then filtered through a pad of Celite® the filtrate was concentrated in vacuo

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

Procedure: A reaction vessel was charged with compound 26 (2.926 g, 15.43 mmol), Compound 20 (4.32 g, 18.52 mmol), 2-MeTHF (35.99 mL), and subsequently 50% T3P in 2-MeTHF (13.36 g, 21.00 mmol). Pyridine (2.441 g, 2.496 mL, 30.86 mmol) was added and the suspension heated at 47.5° C.±5° C. for 18 h. After completion, the reaction was cooled to ambient temperature and 2-MeTHF (36) and water (30 ml) were added. The layers were split and the organic layer was washed with 10 wt % citric acid solution (30 ml), water (30 ml) and twice with NaHCO3 (20 ml). The organic layer was washed with brine (50 ml), separated and the solvent removed in vacuo. The crude product was dissolved in MTBE (100 ml) and hexane (200 ml) was added as an anti-solvent. A solid precipitated and the resulting slurry was stirred for two hours. The solid was collected by suction filtration and the cake was washed with hexane. The resulting product was dried in a vacuum oven at 55° C. with nitrogen bleed to give the title compound as a beige solid. 1H-NMR (400 MHZ, DMSO-d6) δ 12.96 (d J 6.4 Hz, 1H); 12.1 (s, 1H); 8.9 (d, J=6.4 Hz, 1H); 8.33 (d, J 8 Hz, 1H); 7.84-7.75 (m, 2H); 7.55-7.48 (m, 3H); 1.47 (s, 6H); 1.45 (s, 9H). the suspension heated at 47.5° C.±5° C. for 18 h The layers were split the organic layer was washed with 10 wt % citric acid solution (30 ml), water (30 ml) and twice with NaHCO3 (20 ml) The organic layer was washed with brine (50 ml) separated the solvent removed in vacuo The crude product was dissolved in MTBE (100 ml) hexane (200 ml) was added as an anti-solvent A solid precipitated The solid was collected by suction filtration the cake was washed with hexane The resulting product was dried in a vacuum oven at 55° C. with nitrogen

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

Procedure: Palladium on carbon (wet; 5 wt %) was placed into a round bottomed flask under nitrogen flow. 5-tert-butyl-3,3-dimethyl-6-nitro-benzofuran-2-one (4.7 g, 17.85 mmol) was then added to the vessel. Methanol (120 mL) was then carefully charged to the vessel under nitrogen atmosphere. The vessel was then purged with N2, evacuated, then charged with hydrogen gas. The vessel was evacuated and re-charged with hydrogen gas, and then a continuous hydrogen gas stream was introduced. After completion, the reaction was filtered through Celite® and the cake was washed with MeOH (300 ml). The solvent was removed in vacuo and the product dried under high vacuum to give a white crystalline solid. 1H-NMR (400 MHZ, DMSO-d6) δ 7.05 (s, 1H); 6.48 (s, 1H); 5.02 (s, 2H, NH2); 1.34 (s, 6H); 1.30 (s, 9H) The vessel was then purged with N2 evacuated charged with hydrogen gas The vessel was evacuated re-charged with hydrogen gas a continuous hydrogen gas stream was introduced After completion, the reaction was filtered through Celite® the cake was washed with MeOH (300 ml) The solvent was removed in vacuo the product dried under high vacuum to give a white crystalline solid