甲基 2,2-双(4-氯苯基)乙酸甲酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: A solution of bis-(4-chloro-phenyl)-acetic acid methyl ester (1.19 g, 4.0 mmol) in THF (20 ml) was cooled to −78° C. under nitrogen. A solution of LDA (3.0 mL, 6.0 mmol, 2M in heptane/THF/ethylbenzene) was added over 5 minutes, then after a further 20 minutes, iodomethane (0.63 ml, 10.1 mmol) was added. After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution and allowed to warm to room temperature then concentrated in vacuo to remove organic solvents. The mixture was diluted with ethyl acetate/petrol 1:4 and washed with saturated ammonium chloride solution then brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with an ethyl acetate/petrol gradient (1% to 2%), to afford the title compound as a colourless oil (210 mg, 17%); LCMS (PS-B3) Rt 4.01 min, No Ionisation. 1H NMR (CDCl3) δ 1.88 (3H, s), 3.73 (3H, s), 7.11-7.14 (4H, m), 7.26-7.30 (4H, m). After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution then concentrated in vacuo to remove organic solvents The mixture was diluted with ethyl acetate/petrol 1:4 washed with saturated ammonium chloride solution brine, dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with an ethyl acetate/petrol gradient (1% to 2%)

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

实验步骤: Bis-(4-chloro-phenyl)-acetic acid (4.33 g, 15.4 mmol) was suspended in anhydrous methanol (20 mL) and concentrated hydrochloric acid (5 drops) was added. After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution, then the organic solvent was removed in vacuo. The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution. The organic phase was washed with brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with 10% ethyl acetate/petrol, to afford the title compound as a colourless oil (3.57 g, 78%); LCMS (PS-B3) Rt 3.79 min, No Ionisation. 1H NMR (CDCl3) δ 3.74 (3H, s), 4.96 (1H, s), 7.20-7.23 (4H, m), 7.28-7.32 (4H, m). After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution the organic solvent was removed in vacuo The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution The organic phase was washed with brine dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with 10% ethyl acetate/petrol

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

实验步骤: Bis-(4-chloro-phenyl)-acetic acid (4.33 g, 15.4 mmol) was suspended in anhydrous methanol (20 mL) and concentrated hydrochloric acid (5 drops) was added. After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution, then the organic solvent was removed in vacuo. The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution. The organic phase was washed with brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with 10% ethyl acetate/petrol, to afford the title compound as a colourless oil (3.57 g, 78%); LCMS (PS-B3) Rt 3.79 min, No Ionisation. 1H NMR (CDCl3) δ 3.74 (3H, s), 4.96 (1H, s), 7.20-7.23 (4H, m), 7.28-7.32 (4H, m). After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution the organic solvent was removed in vacuo The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution The organic phase was washed with brine dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with 10% ethyl acetate/petrol

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

实验步骤: A solution of bis-(4-chloro-phenyl)-acetic acid methyl ester (1.19 g, 4.0 mmol) in THF (20 ml) was cooled to −78° C. under nitrogen. A solution of LDA (3.0 mL, 6.0 mmol, 2M in heptane/THF/ethylbenzene) was added over 5 minutes, then after a further 20 minutes, iodomethane (0.63 ml, 10.1 mmol) was added. After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution and allowed to warm to room temperature then concentrated in vacuo to remove organic solvents. The mixture was diluted with ethyl acetate/petrol 1:4 and washed with saturated ammonium chloride solution then brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with an ethyl acetate/petrol gradient (1% to 2%), to afford the title compound as a colourless oil (210 mg, 17%); LCMS (PS-B3) Rt 4.01 min, No Ionisation. 1H NMR (CDCl3) δ 1.88 (3H, s), 3.73 (3H, s), 7.11-7.14 (4H, m), 7.26-7.30 (4H, m). After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution then concentrated in vacuo to remove organic solvents The mixture was diluted with ethyl acetate/petrol 1:4 washed with saturated ammonium chloride solution brine, dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with an ethyl acetate/petrol gradient (1% to 2%)

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

实验步骤: A solution of bis-(4-chloro-phenyl)-acetic acid methyl ester (1.19 g, 4.0 mmol) in THF (20 ml) was cooled to −78° C. under nitrogen. A solution of LDA (3.0 mL, 6.0 mmol, 2M in heptane/THF/ethylbenzene) was added over 5 minutes, then after a further 20 minutes, iodomethane (0.63 ml, 10.1 mmol) was added. After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution and allowed to warm to room temperature then concentrated in vacuo to remove organic solvents. The mixture was diluted with ethyl acetate/petrol 1:4 and washed with saturated ammonium chloride solution then brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with an ethyl acetate/petrol gradient (1% to 2%), to afford the title compound as a colourless oil (210 mg, 17%); LCMS (PS-B3) Rt 4.01 min, No Ionisation. 1H NMR (CDCl3) δ 1.88 (3H, s), 3.73 (3H, s), 7.11-7.14 (4H, m), 7.26-7.30 (4H, m). After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution then concentrated in vacuo to remove organic solvents The mixture was diluted with ethyl acetate/petrol 1:4 washed with saturated ammonium chloride solution brine, dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with an ethyl acetate/petrol gradient (1% to 2%)

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

实验步骤: Bis-(4-chloro-phenyl)-acetic acid (4.33 g, 15.4 mmol) was suspended in anhydrous methanol (20 mL) and concentrated hydrochloric acid (5 drops) was added. After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution, then the organic solvent was removed in vacuo. The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution. The organic phase was washed with brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with 10% ethyl acetate/petrol, to afford the title compound as a colourless oil (3.57 g, 78%); LCMS (PS-B3) Rt 3.79 min, No Ionisation. 1H NMR (CDCl3) δ 3.74 (3H, s), 4.96 (1H, s), 7.20-7.23 (4H, m), 7.28-7.32 (4H, m). After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution the organic solvent was removed in vacuo The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution The organic phase was washed with brine dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with 10% ethyl acetate/petrol

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

实验步骤: A solution of bis-(4-chloro-phenyl)-acetic acid methyl ester (1.19 g, 4.0 mmol) in THF (20 ml) was cooled to −78° C. under nitrogen. A solution of LDA (3.0 mL, 6.0 mmol, 2M in heptane/THF/ethylbenzene) was added over 5 minutes, then after a further 20 minutes, iodomethane (0.63 ml, 10.1 mmol) was added. After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution and allowed to warm to room temperature then concentrated in vacuo to remove organic solvents. The mixture was diluted with ethyl acetate/petrol 1:4 and washed with saturated ammonium chloride solution then brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with an ethyl acetate/petrol gradient (1% to 2%), to afford the title compound as a colourless oil (210 mg, 17%); LCMS (PS-B3) Rt 4.01 min, No ionisation. 1H NMR (CDCl3) δ 1.88 (3H, s), 3.73 (3H, 5), 7.11-7.14 (4H, m), 7.26-7.30 (4H, m). After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution then concentrated in vacuo to remove organic solvents The mixture was diluted with ethyl acetate/petrol 1:4 washed with saturated ammonium chloride solution brine, dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with an ethyl acetate/petrol gradient (1% to 2%)

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

实验步骤: Bis-(4-chloro-phenyl)-acetic acid (4.33 g, 15.4 mmol) was suspended in anhydrous methanol (20 mL) and concentrated hydrochloric acid (5 drops) was added. After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution, then the organic solvent was removed in vacuo. The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution. The organic phase was washed with brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with 10% ethyl acetate/petrol, to afford the title compound as a colourless oil (3.57 g, 78%); LCMS (PS-B3) Rt 3.79 min, No ionisation. 1H NMR (CDCl3) δ 3.74 (3H, s), 4.96 (1H, s), 7.20-7.23 (4H, m), 7.28-7.32 (4H, m). After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution the organic solvent was removed in vacuo The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution The organic phase was washed with brine dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with 10% ethyl acetate/petrol

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

实验步骤: A solution of bis-(4-chloro-phenyl)-acetic acid methyl ester (1.19 g, 4.0 mmol) in THF (20 ml) was cooled to −78° C. under nitrogen. A solution of LDA (3.0 mL, 6.0 mmol, 2M in heptane/THF/ethylbenzene) was added over 5 minutes, then after a further 20 minutes, iodomethane (0.63 ml, 10.1 mmol) was added. After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution and allowed to warm to room temperature then concentrated in vacuo to remove organic solvents. The mixture was diluted with ethyl acetate/petrol 1:4 and washed with saturated ammonium chloride solution then brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with an ethyl acetate/petrol gradient (1% to 2%), to afford the title compound as a colourless oil (210 mg, 17%); LCMS (PS-B3) Rt 4.01 min, No ionisation. 1H NMR (CDCl3) δ 1.88 (3H, s), 3.73 (3H, 5), 7.11-7.14 (4H, m), 7.26-7.30 (4H, m). After 4 hours the reaction was quenched by the addition of saturated ammonium chloride solution then concentrated in vacuo to remove organic solvents The mixture was diluted with ethyl acetate/petrol 1:4 washed with saturated ammonium chloride solution brine, dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with an ethyl acetate/petrol gradient (1% to 2%)

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

实验步骤: Bis-(4-chloro-phenyl)-acetic acid (4.33 g, 15.4 mmol) was suspended in anhydrous methanol (20 mL) and concentrated hydrochloric acid (5 drops) was added. After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution, then the organic solvent was removed in vacuo. The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution. The organic phase was washed with brine, dried (MgSO4), filtered and concentrated to give a residue which was purified by column chromatography (SiO2), eluting with 10% ethyl acetate/petrol, to afford the title compound as a colourless oil (3.57 g, 78%); LCMS (PS-B3) Rt 3.79 min, No ionisation. 1H NMR (CDCl3) δ 3.74 (3H, s), 4.96 (1H, s), 7.20-7.23 (4H, m), 7.28-7.32 (4H, m). After 1 day the reaction was quenched by the addition of saturated sodium bicarbonate solution the organic solvent was removed in vacuo The residue was partitioned between ethyl acetate and 50% saturated potassium carbonate solution The organic phase was washed with brine dried (MgSO4) filtered concentrated to give a residue which was purified by column chromatography (SiO2) eluting with 10% ethyl acetate/petrol