3-methyl-2,5-dihydro-1H-3-benzazepin-4-one

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

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

Procedure: At 140° C., 2-chloro-N-methyl-N-phenethyl-acetamide (20 g, 94 mmol) and aluminum trichloride (18.9 g, 142 mmol, 1.5 eq.) were heated for 8 hours. The mixture was allowed to cool to ambient temperature and poured over ice. The mixture was extracted with dichlomethane (3×200 mL) and dried with sodium sulfate. The solvent was evaporated to give 3-methyl-1,3,4,5-tetrahydro-benzo[d]azepin-2-one (18.2 g, 100%): 1H NMR (300 MHz, CDCl3) δ 7.1 (m, 4H), 3.92 (s, 2H), 3.71 (t, 2H), 3.15 (t, 2H), 3.03 (s, 3H). poured over ice The mixture was extracted with dichlomethane (3×200 mL) dried with sodium sulfate The solvent was evaporated

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

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

Procedure: In a 22 L flask, under nitrogen, was 3-methyl-2,3,4,5-tetrahydro-1H-3-benzazepin-2-one (606 g, 3.46 mol) and isoamyl nitrite (543 g, 4.5 mol) in THF (7.88 L). The mixture was cooled to about 0° C. before LiHMDS (1 N THF solution, 4.5 L, 04.5 mol) was added at a rate such that the temperature remained below about 7° C. After addition, the reaction was allowed to stir at room temperature for about 2 h while monitoring for the reaction progress by HPLC. Upon completion of the reaction, the mixture was cooled to about 0° C., and the pH adjusted from 12 to about 2-1 using aqueous HCl (2N). The resulting precipitate was stirred for about 6 h before isolation by filtration and drying to provide 1-hydroxyimino-3-methyl-2,3,4,5-tetrahydro-1H-3-benzazepin-2-one 604.7 g (85.6%). In a 22 L flask, under nitrogen, was was added at a rate such that the temperature remained below about 7° C After addition Upon completion of the reaction the mixture was cooled to about 0° C. The resulting precipitate was stirred for about 6 h before isolation by filtration drying

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3-Methyl-2,3,4,5-tetrahydro-1H-3-benzazepin-2-one (1 eq.) was dissolved in THF and isoamylnitrite (1.2 eq.) was added. The mixture was cooled to 0° C. in an ice bath. NaHMDS (1.1 eq., 1M in THF) was added dropwise. After stirring for 1 hour or until the reaction was complete, the mixture was concentrated then acidified with 1N aqueous hydrochloric acid solution and extracted with ethyl acetate. The organic portion was dried and concentrated to yield a crude product which was purified by silica gel chromatography to give 1-hydroxyimino-3-methyl-2,3,4,5-tetrahydro-1H-3-benzazepin-2-one: Mass spectroscopy (M+H)+, 205.1. the mixture was concentrated extracted with ethyl acetate The organic portion was dried concentrated to yield a crude product which was purified by silica gel chromatography

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

Procedure: To a slurry of sodium hydride (1.1 eq) in 15 mL of dry DMF was added 2,3,4,5-tetrahydro-1H-3-benzazepin-2-one (0.0042 moles) as a solution in 10 mL of DMF. Methyl iodide (about 2 eq.) was then added. When complete by TLC, the reaction mixture was poured over ice and extracted into ethyl acetate. The organic layer was washed with water, followed by brine. The organic layer was then dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by HPLC (LC 2000), eluting with an ethyl acetate/hexane system to give 3-methyl-2,3,4,5-tetrahydro-1H-3-benzazepin-2-one. When complete by TLC, the reaction mixture was poured over ice extracted into ethyl acetate The organic layer was washed with water The organic layer was then dried over Na2SO4 filtered concentrated under reduced pressure The residue was purified by HPLC (LC 2000) eluting with an ethyl acetate/hexane system

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

Procedure: To a slurry of sodium hydride (1.1 eq) in 15 mL of dry DMF was added 2,3,4,5-tetrahydro-1H-3-benzazepin-2-one (0.0042 moles) as a solution in 10 mL of DMF. Methyl iodide (about 2 eq.) was then added. When complete by TLC, the reaction mixture was poured over ice and extracted into ethyl acetate. The organic layer was washed with water, followed by brine. The organic layer was then dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by HPLC (LC 2000), eluting with an ethyl acetate/hexane system to give 3-methyl-2,3,4,5-tetrahydro-1H-3-benzazepin-2-one. When complete by TLC, the reaction mixture was poured over ice extracted into ethyl acetate The organic layer was washed with water The organic layer was then dried over Na2SO4 filtered concentrated under reduced pressure The residue was purified by HPLC (LC 2000) eluting with an ethyl acetate/hexane system

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

Procedure: To a slurry of sodium hydride (1.1 eq) in 15 mL of dry DMF was added 2,3,4,5-tetrahydro-1H-3-benzazepin-2-one (0.0042 moles) as a solution in 10 mL of DMF. Methyl iodide (about 2 eq.) was then added. When complete by TLC, the reaction mixture was poured over ice and extracted into ethyl acetate. The organic layer was washed with water, followed by brine. The organic layer was then dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by HPLC (LC 2000), eluting with an ethyl acetate/hexane system to give 3-methyl-2,3,4,5-tetrahydro-1H-3-benzazepin-2-one. When complete by TLC, the reaction mixture was poured over ice extracted into ethyl acetate The organic layer was washed with water The organic layer was then dried over Na2SO4 filtered concentrated under reduced pressure The residue was purified by HPLC (LC 2000) eluting with an ethyl acetate/hexane system

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

Procedure: At 140° C., 2-chloro-N-methyl-N-phenethyl-acetamide (20 g, 94 mmol) and aluminum trichloride (18.9 g, 142 mmol, 1.5 eq.) were heated for 8 hours. The mixture was allowed to cool to ambient temperature and poured over ice. The mixture was extracted with dichlomethane (3×200 mL) and dried with sodium sulfate. The solvent was evaporated to give 3-methyl-1,3,4,5-tetrahydro-benzo[d]azepin-2-one (18.2 g, 100%): 1H NMR (300 MHz, CDCl3) δ 7.1 (m, 4H), 3.92 (s, 2H), 3.71 (t, 2H), 3.15 (t, 2H), 3.03 (s, 3H). poured over ice The mixture was extracted with dichlomethane (3×200 mL) dried with sodium sulfate The solvent was evaporated

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

Procedure: At 140° C., 2-chloro-N-methyl-N-phenethyl-acetamide (20 g, 94 mmol) and aluminum trichloride (18.9 g, 142 mmol, 1.5 eq.) were heated for 8 hours. The mixture was allowed to cool to ambient temperature and poured over ice. The mixture was extracted with dichlomethane (3×200 mL) and dried with sodium sulfate. The solvent was evaporated to give 3-methyl-1,3,4,5-tetrahydro-benzo[d]azepin-2-one (18.2 g, 100%): 1H NMR (300 MHz, CDCl3) δ 7.1 (m, 4H), 3.92 (s, 2H), 3.71 (t, 2H), 3.15 (t, 2H), 3.03 (s, 3H). poured over ice The mixture was extracted with dichlomethane (3×200 mL) dried with sodium sulfate The solvent was evaporated

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