3-(3-bromo-4-fluorophenyl)-3-methylbutan-2-one

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3-(3-bromo-4-fluorophenyl)-3-methylbutan-2-one (13 g, 50 mmol) in NMP (100 mL) was added CuCN (17.9 g, 200 mmol, 4 eq). The mixture was heated 24 h at 160° C. After cooling, the reaction was diluted with EtOAc, washed with 2N HCl (200 mL), satd NaHCO3 (200 mL) and brine (200 mL) successively, dried over MgSO4 and evaporated in vacuo. The residue was purified by column chromatography (Hex/EtOAc=4:1) to give 2-fluoro-5-(2-methyl-3-oxobutan-2-yl)benzonitrile (7.1 g, 69%). 1H NMR (400 MHz, CDCl3) δ 7.56-7.54 (m, 1H), 7.49-7.45 (m, 1H), 7.20 (t, J=8.4 Hz, 1H), 1.96 (s, 3H), 1.50 (s, 6H). After cooling washed with 2N HCl (200 mL), satd NaHCO3 (200 mL) and brine (200 mL) successively dried over MgSO4 evaporated in vacuo The residue was purified by column chromatography (Hex/EtOAc=4:1)

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

Procedure: To a stirred solution of 3-(3-bromo-4-fluorophenyl)-3-methylbutan-2-ol (18 g, 69 mmol) in DCM (300 mL) at 0° C. was added PCC (29.7 g, 2 eq) portionwise. After stirring 24 h at room temperature, the reaction mixture was combined with water and extracted with DCM. The combined extracts were dried over MgSO4 and evaporated in vacuo. The residue was purified by flash column chromatography (Hex/EtOAc=10:1) to give 3-(3-bromo-4-fluorophenyl)-3-methylbutan-2-one (13 g, 73%). 1H NMR (400 MHz, CDCl3) δ 7.47-7.45 (m, 1H), 7.17-7.14 (m, 1H), 7.09 (t, J=8.8 Hz, 1H), 1.98 (s, 3H), 1.45 (s, 6H). extracted with DCM The combined extracts were dried over MgSO4 evaporated in vacuo The residue was purified by flash column chromatography (Hex/EtOAc=10:1)

Conditions: temp:160.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3-(3-bromo-4-fluorophenyl)-3-methylbutan-2-one (13 g, 50 mmol) in NMP (100 mL) was added CuCN (17.9 g, 200 mmol, 4 eq). The mixture was heated 24 h at 160° C. After cooling, the reaction was diluted with EtOAc, washed with 2N HCl (200 mL), satd NaHCO3 (200 mL) and brine (200 mL) successively, dried over MgSO4 and evaporated in vacuo. The residue was purified by column chromatography (Hex/EtOAc=4:1) to give 2-fluoro-5-(2-methyl-3-oxobutan-2-yl)benzonitrile (7.1 g, 69%). 1H NMR (400 MHz, CDCl3) δ 7.56-7.54 (m, 1H), 7.49-7.45 (m, 1H), 7.20 (t, J=8.4 Hz, 1H), 1.96 (s, 3H), 1.50 (s, 6H). After cooling washed with 2N HCl (200 mL), satd NaHCO3 (200 mL) and brine (200 mL) successively dried over MgSO4 evaporated in vacuo The residue was purified by column chromatography (Hex/EtOAc=4:1)

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

Procedure: To a stirred solution of 3-(3-bromo-4-fluorophenyl)-3-methylbutan-2-ol (18 g, 69 mmol) in DCM (300 mL) at 0° C. was added PCC (29.7 g, 2 eq) portionwise. After stirring 24 h at room temperature, the reaction mixture was combined with water and extracted with DCM. The combined extracts were dried over MgSO4 and evaporated in vacuo. The residue was purified by flash column chromatography (Hex/EtOAc=10:1) to give 3-(3-bromo-4-fluorophenyl)-3-methylbutan-2-one (13 g, 73%). 1H NMR (400 MHz, CDCl3) δ 7.47-7.45 (m, 1H), 7.17-7.14 (m, 1H), 7.09 (t, J=8.8 Hz, 1H), 1.98 (s, 3H), 1.45 (s, 6H). extracted with DCM The combined extracts were dried over MgSO4 evaporated in vacuo The residue was purified by flash column chromatography (Hex/EtOAc=10:1)