3-Methyl-4-phenylbutan-2-one

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: Sodium hydride (0.3965 g, 16.52 mmol) was added slowly to a NaCl ice bath containing EtOH (5.6 mL, 2.6 M) stirring under N2. 59 (2.2727 g, 14.01 mmol) and diethyloxalate (2.0649 g, 14.13 mmol) were mixed together, and then added to the chilled NaOEt solution. After stirring for 5 minutes, the reaction was warmed to room temperature. After stirring for 5 h, the reaction was quenched at 0° C. with 1N HCl and extracted 2× with CH2Cl2. The combined organics were washed with H2O, dried with Na2SO4, filtered, concentrated, and purified by silica gel chromatography (Combiflash column, 67:30:3 Hexanes: CH2Cl2: 2N NH3 in EtOH): Only pure fractions were combined and concentrated to obtain 60. 1H (CDCl3, 400 MHz): δ 14.55 (1H, broad s), 7.32-7.12 (5H, m), 6.36 (1H, s), 4.33 (2H, q, J=7.0 Hz), 3.05 (1H, dd, J=13.5, 6.8 Hz), 2.84 (1H, app sex, J=7.0 Hz), 2.67 (1H, dd, J=13.5, 7.8 Hz), 1.36 (3H, t, J=7.1 Hz), 2.33 (3H, d, J=7.0 Hz) ppm. 13C (CDCl3, 100 MHz): δ 205.78, 166.96, 161.88, 138.75, 128.80, 128.30, 126.29, 100.75, 62.32, 46.35, 39.10, 16.51, 13.88 ppm. DEPT (CDCl3, 100 MHz): CH3 carbons: 16.51, 13.88; CH2 carbons: 62.32, 39.10; CH carbons: 128.80, 128.30, 126.29, 100.75, 46.35 ppm. HPLC: 11.084 min. After stirring for 5 minutes After stirring for 5 h the reaction was quenched at 0° C. with 1N HCl extracted 2× with CH2Cl2 The combined organics were washed with H2O dried with Na2SO4 filtered concentrated purified by silica gel chromatography (Combiflash column, 67:30:3 Hexanes: CH2Cl2: 2N NH3 in EtOH) concentrated

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

実験手順: 1.4 M Methyl lithium (34.8 mL, 48.72 mmol) was added over 70 min to a stirring 0° C. solution of α-methylhydrocinnamic acid (4.0019 g, 24.36 mmol) in dry Et2O (122 mL, 0.2 M): The ice bath was removed, and the reaction was allowed to stir at room temperature for 2 additional hours. The reaction was the poured into rapidly stirring ice water containing aq. HCl. The organic layer was removed, washed with NaHCO3 and brine, then dried with Na2SO4, filtered, concentrated, and purified by silica gel chromatography (Combiflash column, 95:5 Hexanes: EtOAc) to achieve pure 59 (2.3038 g, 58.3%): 1H (CDCl3, 400 MHz): δ 7.28 (2H, t, J=7.3 Hz), 7.20 (1H, t, J=7.3 Hz), 7.16 (2H, d, J=7.3 Hz), 3.00 (1H, dd, J=13.7, 6.8 Hz), 2.83 (1H, app sex, 7.0 Hz), 2.56 (1H, dd, J=13.7, 7.8 Hz), 2.08 (3H, s), 1.09 (3H, d, J=6.8 Hz) ppm. 13C (CDCl3, 100 MHz): δ 211.99, 139.53, 128.79, 128.28, 126.10, 48.65, 38.75, 28.74, 16.10 ppm. DEPT (CDCl3, 100 MHz): CH3 carbons: 28.74, 16.10; CH2 carbons: 38.75; CH carbons: 128.79, 128.28, 126.10, 48.65 ppm. HPLC: 10.229 min. (Note: SM has HPLC retention time of 9.225 min.) The ice bath was removed poured into rapidly stirring ice water containing aq. HCl The organic layer was removed washed with NaHCO3 and brine dried with Na2SO4 filtered concentrated purified by silica gel chromatography (Combiflash column, 95:5 Hexanes: EtOAc) 10.229 min. (Note: SM has HPLC retention time of 9.225 min.)

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

実験手順: Sodium hydride (0.3965 g, 16.52 mmol) was added slowly to a NaCl ice bath containing EtOH (5.6 mL, 2.6 M) stirring under N2. 59 (2.2727 g, 14.01 mmol) and diethyloxalate (2.0649 g, 14.13 mmol) were mixed together, and then added to the chilled NaOEt solution. After stirring for 5 minutes, the reaction was warmed to room temperature. After stirring for 5 h, the reaction was quenched at 0° C. with 1N HCl and extracted 2× with CH2Cl2. The combined organics were washed with H2O, dried with Na2SO4, filtered, concentrated, and purified by silica gel chromatography (Combiflash column, 67:30:3 Hexanes:CH2Cl2:2N NH3 in EtOH): Only pure fractions were combined and concentrated to obtain 60. 1H (CDCl3, 400 MHz): δ 14.55 (1H, broad s), 7.32-7.12 (5H, m), 6.36 (1H, s), 4.33 (2H, q, J=7.0 Hz), 3.05 (1H, dd, J=13.5, 6.8 Hz), 2.84 (1H, app sex, J=7.0 Hz), 2.67 (1H, dd, J=13.5, 7.8 Hz), 1.36 (3H, t, J=7.1 Hz), 2.33 (3H, d, J=7.0 Hz) ppm. 13C (CDCl3, 100 MHz): δ 205.78, 166.96, 161.88, 138.75, 128.80, 128.30, 126.29, 100.75, 62.32, 46.35, 39.10, 16.51, 13.88 ppm. DEPT (CDCl3, 100 MHz): CH3 carbons: 16.51, 13.88; CH2 carbons: 62.32, 39.10; CH carbons: 128.80, 128.30, 126.29, 100.75, 46.35 ppm. HPLC: 11.084 min. After stirring for 5 minutes After stirring for 5 h the reaction was quenched at 0° C. with 1N HCl extracted 2× with CH2Cl2 The combined organics were washed with H2O dried with Na2SO4 filtered concentrated purified by silica gel chromatography (Combiflash column, 67:30:3 Hexanes:CH2Cl2:2N NH3 in EtOH) concentrated

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

実験手順: 1.4 M Methyl lithium (34.8 mL, 48.72 mmol) was added over 70 min to a stirring 0° C. solution of α-methylhydrocinnamic acid (4.0019 g, 24.36 mmol) in dry Et2O (122 mL, 0.2 M): The ice bath was removed, and the reaction was allowed to stir at room temperature for 2 additional hours. The reaction was the poured into rapidly stirring ice water containing aq. HCl. The organic layer was removed, washed with NaHCO3 and brine, then dried with Na2SO4, filtered, concentrated, and purified by silica gel chromatography (Combiflash column, 95:5 Hexanes:EtOAc) to achieve pure 59 (2.3038 g, 58.3%): 1H (CDCl3, 400 MHz): δ 7.28 (2H, t, J=7.3 Hz), 7.20 (1H, t, J=7.3 Hz), 7.16 (2H, d, J=7.3 Hz), 3.00 (1H, dd, J=13.7, 6.8 Hz), 2.83 (1H, app sex, 7.0 Hz), 2.56 (1H, dd, J=13.7, 7.8 Hz), 2.08 (3H, s), 1.09 (3H, d, J=6.8 Hz) ppm. 13C (CDCl3, 100 MHz): δ 211.99, 139.53, 128.79, 128.28, 126.10, 48.65, 38.75, 28.74, 16.10 ppm. DEPT (CDCl3, 100 MHz): CH3 carbons: 28.74, 16.10; CH2 carbons: 38.75; CH carbons: 128.79, 128.28, 126.10, 48.65 ppm. HPLC: 10.229 min. (Note: SM has HPLC retention time of 9.225 min.) The ice bath was removed poured into rapidly stirring ice water containing aq. HCl The organic layer was removed washed with NaHCO3 and brine dried with Na2SO4 filtered concentrated purified by silica gel chromatography (Combiflash column, 95:5 Hexanes:EtOAc) 10.229 min. (Note: SM has HPLC retention time of 9.225 min.)

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

実験手順: Sodium hydride (0.3965 g, 16.52 mmol) was added slowly to a NaCl ice bath containing EtOH (5.6 mL, 2.6 M) stirring under N2. 59 (2.2727 g, 14.01 mmol) and diethyloxalate (2.0649 g, 14.13 mmol) were mixed together, and then added to the chilled NaOEt solution. After stirring for 5 minutes, the reaction was warmed to room temperature. After stirring for 5 h, the reaction was quenched at 0° C. with 1N HCl and extracted 2× with CH2Cl2. The combined organics were washed with H2O, dried with Na2SO4, filtered, concentrated, and purified by silica gel chromatography (Combiflash column, 67:30:3 Hexanes:CH2Cl2:2N NH3 in EtOH): Only pure fractions were combined and concentrated to obtain 60. 1H (CDCl3, 400 MHz): δ 14.55 (1H, broad s), 7.32-7.12 (5H, m), 6.36 (1H, s), 4.33 (2H, q, J=7.0 Hz), 3.05 (1H, dd, J=13.5, 6.8 Hz), 2.84 (1H, app sex, J=7.0 Hz), 2.67 (1H, dd, J=13.5, 7.8 Hz), 1.36 (3H, t, J=7.1 Hz), 2.33 (3H, d, J=7.0 Hz) ppm. 13C (CDCl3, 100 MHz): δ 205.78, 166.96, 161.88, 138.75, 128.80, 128.30, 126.29, 100.75, 62.32, 46.35, 39.10, 16.51, 13.88 ppm. DEPT (CDCl3, 100 MHz): CH3 carbons: 16.51, 13.88; CH2 carbons: 62.32, 39.10; CH carbons: 128.80, 128.30, 126.29, 100.75, 46.35 ppm. HPLC: 11.084 min. After stirring for 5 minutes After stirring for 5 h the reaction was quenched at 0° C. with 1N HCl extracted 2× with CH2Cl2 The combined organics were washed with H2O dried with Na2SO4 filtered concentrated purified by silica gel chromatography (Combiflash column, 67:30:3 Hexanes:CH2Cl2:2N NH3 in EtOH) concentrated

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

実験手順: 1.4 M Methyl lithium (34.8 mL, 48.72 mmol) was added over 70 min to a stirring 0° C. solution of α-methylhydrocinnamic acid (4.0019 g, 24.36 mmol) in dry Et2O (122 mL, 0.2 M): The ice bath was removed, and the reaction was allowed to stir at room temperature for 2 additional hours. The reaction was the poured into rapidly stirring ice water containing aq. HCl. The organic layer was removed, washed with NaHCO3 and brine, then dried with Na2SO4, filtered, concentrated, and purified by silica gel chromatography (Combiflash column, 95:5 Hexanes:EtOAc) to achieve pure 59 (2.3038 g, 58.3%): 1H (CDCl3, 400 MHz): δ 7.28 (2H, t, J=7.3 Hz), 7.20 (1H, t, J=7.3 Hz), 7.16 (2H, d, J=7.3 Hz), 3.00 (1H, dd, J=13.7, 6.8 Hz), 2.83 (1H, app sex, 7.0 Hz), 2.56 (1H, dd, J=13.7, 7.8 Hz), 2.08 (3H, s), 1.09 (3H, d, J=6.8 Hz) ppm. 13C (CDCl3, 100 MHz): δ 211.99, 139.53, 128.79, 128.28, 126.10, 48.65, 38.75, 28.74, 16.10 ppm. DEPT (CDCl3, 100 MHz): CH3 carbons: 28.74, 16.10; CH2 carbons: 38.75; CH carbons: 128.79, 128.28, 126.10, 48.65 ppm. HPLC: 10.229 min. (Note: SM has HPLC retention time of 9.225 min.) The ice bath was removed poured into rapidly stirring ice water containing aq. HCl The organic layer was removed washed with NaHCO3 and brine dried with Na2SO4 filtered concentrated purified by silica gel chromatography (Combiflash column, 95:5 Hexanes:EtOAc) 10.229 min. (Note: SM has HPLC retention time of 9.225 min.)