tert-butyl N-(9-azabicyclo[3.3.1]nonan-3-yl)carbamate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Ethyl iodide (50 μL, 0.63 mmol) was added to a solution of the amine from Step B (100 mg, 0.42 mmol) in methylene chloride (2 mL) at 0° C. The mixture was allowed to warm to room temperature and stirred for 30 h. The mixture was quenched with a saturated solution of sodium bicarbonate and extracted with methylene chloride. The combined organic layers were washed with brine, dried (Na2SO4), filtered and concentrated. The crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide) to afford tert-butyl 9-ethyl-9-azabicyclo[3.3.1]nonan-3-ylcarbamate (50 mg, 45%) as a white solid: 1H NMR (500 MHz, CDCl3) δ 4.28 (br s, 1H), 3.99 (br s, 1H), 3.13-3.10 (m, 2H), 2.63 (q, J=7.0 Hz, 2H), 2.38-2.30 (m, 2H), 1.90-1.82 (m, 3H), 1.48-1.46 (m, 1H), 1.44 (s, 9H), 1.16-0.95 (m, 7H); MS (ESI+) m/z 269 (M+H). The mixture was quenched with a saturated solution of sodium bicarbonate extracted with methylene chloride The combined organic layers were washed with brine dried (Na2SO4) filtered concentrated The crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of the carbamate from Step A (430 mg, 1.69 mmol) in THF (2 mL) at 0° C. was added a solution of sodium hydroxide (2.0 g, 50 mmol) in water (20 mL), followed by a solution of KMnO4 (2.0 g, 12.6 mmol) in water (100 mL). The mixture was allowed to warm to room temperature and stirred overnight. Additional KMnO4 (2.0 g, 12.6 mmol) solution was added at room temperature and the mixture was stirred for additional 1 h. The mixture was extracted with methylene chloride. The combined organic layers were washed with brine, dried (Na2SO4), filtered and concentrated to afford tert-butyl 9-azabicyclo[3.3.1]nonan-3-ylcarbamate (360 mg, 89%) as an off-white solid: 1H NMR (500 MHz, CDCl3) δ 4.32 (br s, 1H), 3.66 (br s, 1H), 3.33-3.00 (m, 2H), 2.25-2.00 (m, 2H), 1.85-1.48 (m, 5H), 1.45 (s, 9H), 1.40-1.35 (m, 2H), 1.09-1.02 (m, 2H); MS (ESI+) m/z 241 (M+H). the mixture was stirred for additional 1 h The mixture was extracted with methylene chloride The combined organic layers were washed with brine dried (Na2SO4) filtered concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Ethyl iodide (50 μL, 0.63 mmol) was added to a solution of the amine from Step B (100 mg, 0.42 mmol) in methylene chloride (2 mL) at 0° C. The mixture was allowed to warm to room temperature and stirred for 30 h. The mixture was quenched with a saturated solution of sodium bicarbonate and extracted with methylene chloride. The combined organic layers were washed with brine, dried (Na2SO4), filtered and concentrated. The crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide) to afford tert-butyl 9-ethyl-9-azabicyclo[3.3.1]nonan-3-ylcarbamate (50 mg, 45%) as a white solid: 1H NMR (500 MHz, CDCl3) δ 4.28 (br s, 1H), 3.99 (br s, 1H), 3.13-3.10 (m, 2H), 2.63 (q, J=7.0 Hz, 2H), 2.38-2.30 (m, 2H), 1.90-1.82 (m, 3H), 1.48-1.46 (m, 1H), 1.44 (s, 9H), 1.16-0.95 (m, 7H); MS (ESI+) m/z 269 (M+H). The mixture was quenched with a saturated solution of sodium bicarbonate extracted with methylene chloride The combined organic layers were washed with brine dried (Na2SO4) filtered concentrated The crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of the carbamate from Step A (430 mg, 1.69 mmol) in THF (2 mL) at 0° C. was added a solution of sodium hydroxide (2.0 g, 50 mmol) in water (20 mL), followed by a solution of KMnO4 (2.0 g, 12.6 mmol) in water (100 mL). The mixture was allowed to warm to room temperature and stirred overnight. Additional KMnO4 (2.0 g, 12.6 mmol) solution was added at room temperature and the mixture was stirred for additional 1 h. The mixture was extracted with methylene chloride. The combined organic layers were washed with brine, dried (Na2SO4), filtered and concentrated to afford tert-butyl 9-azabicyclo[3.3.1]nonan-3-ylcarbamate (360 mg, 89%) as an off-white solid: 1H NMR (500 MHz, CDCl3) δ 4.32 (br s, 1H), 3.66 (br s, 1H), 3.33-3.00 (m, 2H), 2.25-2.00 (m, 2H), 1.85-1.48 (m, 5H), 1.45 (s, 9H), 1.40-1.35 (m, 2H), 1.09-1.02 (m, 2H); MS (ESI+) m/z 241 (M+H). the mixture was stirred for additional 1 h The mixture was extracted with methylene chloride The combined organic layers were washed with brine dried (Na2SO4) filtered concentrated