4-(2,3-difluorophenyl)piperidine

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 mixture of 4-(2,3-difluorophenyl)-1,2,3,6-tetrahydropyridine (2.4 g, 12.3 mmol), palladium on active carbon (0.5 g) and formic acid (2.4 ml) in isopropanol (50 ml) was hydrogenated at 50 psi for 6 h under hydrogen gas. The reaction mixture was filtered through a pad of celite and the filtrate was concentrated and evaporated to dryness. Aqueous sodium carbonate (10%, 50 ml) was added. The aqueous phase was extracted with ethylacetate (3×60 ml) and the combined organic phases was dried (MgSO4), filtered and evaporated to dryness. Yield: 2.11 g. MS m/z (rel. intensity, 70 eV) 197 (M+, bp), 196 (53), 140 (11), 127 (10), 114 (6). The reaction mixture was filtered through a pad of celite the filtrate was concentrated evaporated to dryness Aqueous sodium carbonate (10%, 50 ml) was added The aqueous phase was extracted with ethylacetate (3×60 ml) the combined organic phases was dried (MgSO4) filtered evaporated to dryness

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 4-(2,3-difluorophenyl)piperidine (0.41 g, 2.08 mmol) in acetonitrile (4 ml), was added potassium carbonate (0.57 g, 4.16 mmol) and 1-iodoethane (0.163 ml, 2.12 mmol) and the mixture was heated to 120° C. in a sealed tube under microwave radiation for 1200 s. Water (50 ml) was added and the mixture was extracted with ethylacetate (3×40 ml). The combined organic phases was dried (MgSO4), filtered and evaporated to dryness. The oily residue was purified by flash column chromatography (ethylacetate/methanol, 1:1) to give the title compound (0.31 g). MS m/z (reL. intensity, 70 eV) 225 (M+, 20), 224 (14), 211 (13), 210 (bp), 127 (8). the mixture was extracted with ethylacetate (3×40 ml) The combined organic phases was dried (MgSO4) filtered evaporated to dryness The oily residue was purified by flash column chromatography (ethylacetate/methanol, 1:1)

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 4-(2,3-difluorophenyl)piperidine (0.41 g, 2.08 mmol) in acetonitrile (4 ml), was added potassium carbonate (0.57 g, 4.16 mmol) and 1-iodoethane (0.163 ml, 2.12 mmol) and the mixture was heated to 120° C. in a sealed tube under microwave radiation for 1200 s. Water (50 ml) was added and the mixture was extracted with ethylacetate (3×40 ml). The combined organic phases was dried (MgSO4), filtered and evaporated to dryness. The oily residue was purified by flash column chromatography (ethylacetate/methanol, 1:1) to give the title compound (0.31 g). MS m/z (reL. intensity, 70 eV) 225 (M+, 20), 224 (14), 211 (13), 210 (bp), 127 (8). the mixture was extracted with ethylacetate (3×40 ml) The combined organic phases was dried (MgSO4) filtered evaporated to dryness The oily residue was purified by flash column chromatography (ethylacetate/methanol, 1:1)

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

实验步骤: To a solution of 4-(2,3-difluorophenyl)piperidine (0.2 g, 1.01 mmol) in acetonitrile (10 ml), was added potassium carbonate (0.28 g, 2.0 mmol) and 1-iodomethane (0.06 ml, 1.0 mmol) and the mixture was stirred at ambient temperature for 1 h. MS m/z (rel. intensity, 70 eV) 211 (M+, 78), 210 (bp), 2140 (8), 127 (12), 97 (11).