2-(3-chlorophenyl)-2-methylpropanal

反応条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred solution of 2-(3-chlorophenyl)-2-methylpropanal (4.6 g, 25.7 mmol) in THF (150 mL) at 0° C. was added MeMgBr (3M in ether, 17.1 mL, 51.3 mmol, 2 eq) dropwise over 2 h. After stirring 1 h at 0° C., the reaction was allowed to warm to room temperature, quenched with 1N HCl and then extracted with EtOAc. The extracts were dried over MgSO4 and evaporated in vacuo. The residue was purified by chromatography (silica, Hex/EtOAc=20:1 to 10:1) to give 3-(3-chlorophenyl)-3-methylbutan-2-ol (3.9 g, 78%). 1H NMR (400 MHz, CDCl3) δ 7.36 (s, 1H), 7.28 (m, 2H), 7.18 (m, 1H), 3.85 (q, 1H), 1.32 (d, J=6.4 Hz, 6H), 1.05 (d, J=6.8 Hz, 3H). to warm to room temperature quenched with 1N HCl extracted with EtOAc The extracts were dried over MgSO4 evaporated in vacuo The residue was purified by chromatography (silica, Hex/EtOAc=20:1 to 10:1)

反応条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-(3-chlorophenyl)-2-methylpropanenitrile (5.3 g, 29.2 mmol) in THF (80 mL, anhyd) at −78° C. was added dropwise DIBAL-H (1M in toluene, 87 mL, 87 mmol, 3 eq) over 2 h. After stirring 30 min at −78° C., the reaction mixture was allowed to warm to room temperature, quenched with 2N HCl and extracted with EtOAc. The combined extracts were dried over MgSO4 and evaporated in vacuo to give 2-(3-chlorophenyl)-2-methylpropanal (4.6 g, 88%). 1H NMR (400 MHz, CDCl3) δ 9.48 (s, 1H), 7.32 (m, 3H), 7.14 (m, 1H), 1.51 (s, 6H). to warm to room temperature quenched with 2N HCl extracted with EtOAc The combined extracts were dried over MgSO4 evaporated in vacuo

反応条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred solution of 2-(3-chlorophenyl)-2-methylpropanal (4.6 g, 25.7 mmol) in THF (150 mL) at 0° C. was added MeMgBr (3M in ether, 17.1 mL, 51.3 mmol, 2 eq) dropwise over 2 h. After stirring 1 h at 0° C., the reaction was allowed to warm to room temperature, quenched with 1N HCl and then extracted with EtOAc. The extracts were dried over MgSO4 and evaporated in vacuo. The residue was purified by chromatography (silica, Hex/EtOAc=20:1 to 10:1) to give 3-(3-chlorophenyl)-3-methylbutan-2-ol (3.9 g, 78%). 1H NMR (400 MHz, CDCl3) δ 7.36 (s, 1H), 7.28 (m, 2H), 7.18 (m, 1H), 3.85 (q, 1H), 1.32 (d, J=6.4 Hz, 6H), 1.05 (d, J=6.8 Hz, 3H). to warm to room temperature quenched with 1N HCl extracted with EtOAc The extracts were dried over MgSO4 evaporated in vacuo The residue was purified by chromatography (silica, Hex/EtOAc=20:1 to 10:1)

反応条件: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-(3-chlorophenyl)-2-methylpropanenitrile (5.3 g, 29.2 mmol) in THF (80 mL, anhyd) at −78° C. was added dropwise DIBAL-H (1M in toluene, 87 mL, 87 mmol, 3 eq) over 2 h. After stirring 30 min at −78° C., the reaction mixture was allowed to warm to room temperature, quenched with 2N HCl and extracted with EtOAc. The combined extracts were dried over MgSO4 and evaporated in vacuo to give 2-(3-chlorophenyl)-2-methylpropanal (4.6 g, 88%). 1H NMR (400 MHz, CDCl3) δ 9.48 (s, 1H), 7.32 (m, 3H), 7.14 (m, 1H), 1.51 (s, 6H). to warm to room temperature quenched with 2N HCl extracted with EtOAc The combined extracts were dried over MgSO4 evaporated in vacuo