1-(2-amino-5-bromophenyl)ethanone

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

Procedure: To a stirred solution of 1-(2-amino-5-bromophenyl)-ethanone (10.00 g, 46.70 mmol) in THF (150 mL) was added 3.0M ethyl magnesium bromide (50 mL, 150 mmol) slowly at 0° C. over 20 minutes. The reaction was stirred 1 hr at 0° C., quenched with ammonium chloride solution (sat.) and extracted with ethyl acetate several times. The organic layer was washed with brine and dried over magnesium sulfate. The concentrated crude material was dissolved in THF (150 mL). 1,1′-Carbonyldiimidazole (9.00 g, 56.04 mmol) was added and the reaction was stirred overnight at room temperature. The reaction was partitioned between ammonium chloride solution (sat.) and ethyl acetate. The organic layer was dried over magnesium sulfate and concentrated. Flash silica gel column separation with 30% ethyl acetate/hexane followed by trituration with ether gave 6-bromo-4-ethyl-4-methyl-1,4-dihydro-2H-3,1-benzoxazin-2-one as a white solid (5.84 g, 46%). 1H NMR (DMSO-d6): δ 10.28 (s, 1H), 7.43 (m, 2H), 6.783 (d, J=8.3 Hz, 1H), 2.02 (m, 1H), 1.87 (m, 1H), 1.57 (s, 3H), 0.82 (t, J=7.3 Hz, 3H). MS (ESI) m/z 270/272 ([M+H]+); MS (ESI) m/z 268/270 ([M−H]−); HRMS: calcd for C11H12BrNO2, 269.0051; found (ESI_FT), 270.01259. Anal. Calcd for C11H12BrNO2: C, 48.91; H, 4.48; N, 5.19. Found: C, 48.94; H, 4.38; N, 5.00. quenched with ammonium chloride solution (sat.) extracted with ethyl acetate several times The organic layer was washed with brine dried over magnesium sulfate The concentrated crude material was dissolved in THF (150 mL) the reaction was stirred overnight at room temperature The reaction was partitioned between ammonium chloride solution (sat.) and ethyl acetate The organic layer was dried over magnesium sulfate concentrated Flash silica gel column separation with 30% ethyl acetate/hexane

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

Procedure: To a stirred solution of 1-(2-amino-5-bromophenyl)-ethanone (10.00 g, 46.70 mmol) in THF (150 mL) was added 3.0M ethyl magnesium bromide (50 mL, 150 mmol) slowly at 0° C. over 20 minutes. The reaction was stirred 1 hr at 0° C., quenched with ammonium chloride solution (sat.) and extracted with ethyl acetate several times. The organic layer was washed with brine and dried over magnesium sulfate. The concentrated crude material was dissolved in THF (150 mL). 1,1′-Carbonyldiimidazole (9.00 g, 56.04 mmol) was added and the reaction was stirred overnight at room temperature. The reaction was partitioned between ammonium chloride solution (sat.) and ethyl acetate. The organic layer was dried over magnesium sulfate and concentrated. Flash silica gel column separation with 30% ethyl acetate/hexane followed by trituration with ether gave 6-bromo-4-ethyl-4-methyl-1,4-dihydro-2H-3,1-benzoxazin-2-one as a white solid (5.84 g, 46%). 1H NMR (DMSO-d6): δ 10.28 (s, 1H), 7.43 (m, 2H), 6.783 (d, J=8.3 Hz, 1H), 2.02 (m, 1H), 1.87 (m, 1H), 1.57 (s, 3H), 0.82 (t, J=7.3 Hz, 3H). MS (ESI) m/z 270/272 ([M+H]+); MS (ESI) m/z 268/270 ([M−H]−); HRMS: calcd for C11H12BrNO2, 269.0051; found (ESI_FT), 270.01259. Anal. Calcd for C11H12BrNO2: C, 48.91; H, 4.48; N, 5.19. Found: C, 48.94; H, 4.38; N, 5.00. quenched with ammonium chloride solution (sat.) extracted with ethyl acetate several times The organic layer was washed with brine dried over magnesium sulfate The concentrated crude material was dissolved in THF (150 mL) the reaction was stirred overnight at room temperature The reaction was partitioned between ammonium chloride solution (sat.) and ethyl acetate The organic layer was dried over magnesium sulfate concentrated Flash silica gel column separation with 30% ethyl acetate/hexane

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

Procedure: To a stirred solution of 1-(2-amino-5-bromophenyl)-ethanone (10.00 g, 46.70 mmol) in THF (150 mL) was added 3.0M ethyl magnesium bromide (50 mL, 150 mmol) slowly at 0° C. over 20 minutes. The reaction was stirred 1 hr at 0° C., quenched with ammonium chloride solution (sat.) and extracted with ethyl acetate several times. The organic layer was washed with brine and dried over magnesium sulfate. The concentrated crude material was dissolved in THF (150 mL). 1,1′-Carbonyldiimidazole (9.00 g, 56.04 mmol) was added and the reaction was stirred overnight at room temperature. The reaction was partitioned between ammonium chloride solution (sat.) and ethyl acetate. The organic layer was dried over magnesium sulfate and concentrated. Flash silica gel column separation with 30% ethyl acetate/hexane followed by trituration with ether gave 6-bromo-4-ethyl-4-methyl-1,4-dihydro-2H-3,1-benzoxazin-2-one as a white solid (5.84 g, 46%). 1H NMR (DMSO-d6): δ 10.28 (s, 1H), 7.43 (m, 2H), 6.783 (d, J=8.3 Hz, 1H), 2.02 (m, 1H), 1.87 (m, 1H), 1.57 (s, 3H), 0.82 (t, J=7.3 Hz, 3H). MS (ESI) m/z 270/272 ([M+H]+); MS (ESI) m/z 268/270 ([M−H]−); HRMS: calcd for C11H12BrNO2, 269.0051; found (ESI_FT), 270.01259. Anal. Calcd for C11H12BrNO2: C, 48.91; H, 4.48; N, 5.19. Found: C, 48.94; H, 4.38; N, 5.00. quenched with ammonium chloride solution (sat.) extracted with ethyl acetate several times The organic layer was washed with brine dried over magnesium sulfate The concentrated crude material was dissolved in THF (150 mL) the reaction was stirred overnight at room temperature The reaction was partitioned between ammonium chloride solution (sat.) and ethyl acetate The organic layer was dried over magnesium sulfate concentrated Flash silica gel column separation with 30% ethyl acetate/hexane

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

Procedure: To a stirred solution of 1-(2-amino-5-bromophenyl)-ethanone (10.00 g, 46.70 mmol) in THF (150 mL) was added 3.0M ethyl magnesium bromide (50 mL, 150 mmol) slowly at 0° C. over 20 minutes. The reaction was stirred 1 hr at 0° C., quenched with ammonium chloride solution (sat.) and extracted with ethyl acetate several times. The organic layer was washed with brine and dried over magnesium sulfate. The concentrated crude material was dissolved in THF (150 mL). 1,1′-Carbonyldiimidazole (9.00 g, 56.04 mmol) was added and the reaction was stirred overnight at room temperature. The reaction was partitioned between ammonium chloride solution (sat.) and ethyl acetate. The organic layer was dried over magnesium sulfate and concentrated. Flash silica gel column separation with 30% ethyl acetate/hexane followed by trituration with ether gave 6-bromo-4-ethyl-4-methyl-1,4-dihydro-2H-3,1-benzoxazin-2-one as a white solid (5.84 g, 46%). 1H NMR (DMSO-d6): δ 10.28 (s, 1H), 7.43 (m, 2H), 6.783 (d, J=8.3 Hz, 1H), 2.02 (m, 1H), 1.87 (m, 1H), 1.57 (s, 3H), 0.82 (t, J=7.3 Hz, 3H). MS (ESI) m/z 270/272 ([M+H]+); MS (ESI) m/z 268/270 ([M−H]−); HRMS: calcd for C11H12BrNO2, 269.0051; found (ESI_FT), 270.01259. Anal. Calcd for C11H12BrNO2: C, 48.91; H, 4.48; N, 5.19. Found: C, 48.94; H, 4.38; N, 5.00. quenched with ammonium chloride solution (sat.) extracted with ethyl acetate several times The organic layer was washed with brine dried over magnesium sulfate The concentrated crude material was dissolved in THF (150 mL) the reaction was stirred overnight at room temperature The reaction was partitioned between ammonium chloride solution (sat.) and ethyl acetate The organic layer was dried over magnesium sulfate concentrated Flash silica gel column separation with 30% ethyl acetate/hexane

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:; See reaction.notes.procedure_details.

Procedure: Ethyl chlorooxoacetate (352.7 μL, 3.15 mmol) was added to 1-(2-amino-5-bromophenyl)ethanone (519.8 mg, 2.43 mmol, Example 34c) and pyridine (589.1 μL, 7.28 mmol) in dichloromethane (8 mL) at 0° C. under argon and the reaction was allowed to warm to room temperature and stirred for 17 hours. Water was added, and the solution was extracted with diethyl ether. The organic layer was washed with 10% citric acid, then saturated sodium bicarbonate, dried over anhydrous magnesium sulfate, filtered, and concentrated. The residue was purified by silica gel chromatography eluting with 1:4 ethyl acetate:hexanes to give 648.7 mg (85%) of ethyl[(2-acetyl-4-bromophenyl)amino](oxo)acetate as a solid. 1H NMR (400 MHz, d6-DMSO): δ 12.61 (s, 1H), 8.47 (d, J=9 Hz, 1H), 8.26 (d, J=2 Hz, 1H), 7.88 (dd, J=9, 2 Hz, 1H), 4.31 (q, J=7 Hz, 2H), 2.69 (s, 3H), 1.32 (t, J=7 Hz, 3H). ESI-LCMS m/z 314 (M+H)+. the solution was extracted with diethyl ether The organic layer was washed with 10% citric acid saturated sodium bicarbonate, dried over anhydrous magnesium sulfate filtered concentrated The residue was purified by silica gel chromatography eluting with 1:4 ethyl acetate

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 2.2 M solution of zinc(II)chloride (9.31 mL, 20.49 mmol) in diethyl ether was added to tin(II)chloride (3.88 g, 20.49 mmol) and activated 4 Å molecular sieve pellets (1.00 g) in ethanol (10 mL) under argon. Then, 1-(5-bromo-2-nitrophenyl)-ethanone (1.00 g, 4.10 mmol) and ethyl pyruvate (499.6 mg, 4.30 mmol) in ethanol (10 mL) were added to the reaction mixture via canula. The mixture was heated at 70° C. in an oil bath for three hours, then allowed to cool to room temperature, and carefully quenched with saturated sodium bicarbonate. Ethyl acetate was added and the mixture was filtered through Celite®. The filtrate was extracted with ethyl acetate and the organic layer was dried over anhydrous magnesium sulfate, then filtered and concentrated. The residue was purified by silica gel chromatography eluting with 1:6 ethyl acetate:hexanes to give 39.4 mg (3%) of ethyl 6-bromo-4-methyl-2-quinolinecarboxylate as a solid and 543.1 mg (62%) of 1-(5-bromo-2-aminophenyl)-ethanone as a solid. to cool to room temperature carefully quenched with saturated sodium bicarbonate Ethyl acetate was added the mixture was filtered through Celite® The filtrate was extracted with ethyl acetate the organic layer was dried over anhydrous magnesium sulfate filtered concentrated The residue was purified by silica gel chromatography eluting with 1:6 ethyl acetate