甲基 2-溴-2-(2-氯-4-氟苯基)乙酸甲酯

反应条件: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Methyl 2-chloro-4-fluorophenylacetate (3.15 g, 15.6 mmol), N-bromosuccinimide (2.77 g, 15.6 mmol) and AIBN (255 mg, 1.56 mmol) were suspended in benzene (50.0 mL) and degassed via N2 stream. The resulting mixture was heated to 80° C. for 12 h. After cooling to rt, the mixture was partially concentrated in vacuo and partitioned between ether and water. The layers were separated, and the organic layer was washed with water and brine. The organics were dried (MgSO4), filtered and concentrated in vacuo. The resulting crude oil was purified by by flash chromatography on silica gel (gradient elution; 0%-20% EtOAc/hexanes as eluent) to afford the title compound i-1a. 1HNMR (500 MHz, CDCl3): δ 7.82 (dd, 1H, J=6.0, 8.8 Hz), 7.17 (dd, 1H, J=2.6, 8.3 Hz), 7.08 (m, 1H), 5.88 (s, 1H), 3.84 (s, 3H). degassed via N2 stream After cooling to rt the mixture was partially concentrated in vacuo partitioned between ether and water The layers were separated the organic layer was washed with water and brine The organics were dried (MgSO4) filtered concentrated in vacuo The resulting crude oil was purified by by flash chromatography on silica gel (gradient elution; 0%-20% EtOAc/hexanes as eluent)

反应条件: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Methyl 2-chloro-4-fluorophenylacetate (3.15 g, 15.6 mmol), N-bromosuccinimide (2.77 g, 15.6 mmol) and AIBN (255 mg, 1.56 mmol) were suspended in benzene (50.0 mL) and degassed via N2 stream. The resulting mixture was heated to 80° C. for 12 h. After cooling to rt, the mixture was partially concentrated in vacuo and partitioned between ether and water. The layers were separated, and the organic layer was washed with water and brine. The organics were dried (MgSO4), filtered and concentrated in vacuo. The resulting crude oil was purified by flash chromatography on silica gel (gradient elution; 0%-20% EtOAc/hexanes as eluent) to afford the title compound i-1a. 1HNMR (500 MHz, CDCl3): δ 7.82 (dd, 1H, J=6.0, 8.8 Hz), 7.17 (dd, 1H, J=2.6, 8.3 Hz), 7.08 (m, 1H), 5.88 (s, 1H), 3.84 (s, 3H). degassed via N2 stream After cooling to rt the mixture was partially concentrated in vacuo partitioned between ether and water The layers were separated the organic layer was washed with water and brine The organics were dried (MgSO4) filtered concentrated in vacuo The resulting crude oil was purified by flash chromatography on silica gel (gradient elution; 0%-20% EtOAc/hexanes as eluent)