2-(1-丙-2-基哌啶-4-基)乙醇

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

实验步骤: Under argon gas atmosphere, lithium aluminum hydride (1.19 g) is suspended in tetrahydrofuran (50 mL) and thereto is added dropwise a solution of ethyl (1-isopropylpiperidin-4-yl)acetate (compound obtained in Reference Example 93(1), 6.43 g) in tetrahydrofuran (50 mL) over a period of 15 minutes under ice-cooling. The mixture is stirred at room temperature for 1.5 hours. To the reaction mixture is added successively water (1.2 mL), 2N sodium hydroxide solution (2.4 mL), and water (2.4 mL) under ice-cooling. The mixture is stirred at room temperature for 2 hours. After addition of magnesium sulfate, the reaction mixture is stirred for 10 minutes and filtered. The filtrate is concentrated in vacuo and the residue is purified by flash column chromatography on NH-silica gel (Solvent; n-hexane:ethyl acetate=1:1) to give 2-(1-isopropylpiperidin-4-yl)ethanol (5.09 g, yield; 99%) as a colorless oil. MS (APCI) m/z: 172 [M+H]+ cooling cooling The mixture is stirred at room temperature for 2 hours the reaction mixture is stirred for 10 minutes filtered The filtrate is concentrated in vacuo the residue is purified by flash column chromatography on NH-silica gel (Solvent; n-hexane:ethyl acetate=1:1)

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

实验步骤: Under argon gas atmosphere, lithium aluminum hydride (1.19 g) is suspended in tetrahydrofuran (50 mL) and thereto is added dropwise a solution of ethyl (1-isopropylpiperidin-4-yl)acetate (compound obtained in Reference Example 93(1), 6.43 g) in tetrahydrofuran (50 mL) over a period of 15 minutes under ice-cooling. The mixture is stirred at room temperature for 1.5 hours. To the reaction mixture is added successively water (1.2 mL), 2N sodium hydroxide solution (2.4 mL), and water (2.4 mL) under ice-cooling. The mixture is stirred at room temperature for 2 hours. After addition of magnesium sulfate, the reaction mixture is stirred for 10 minutes and filtered. The filtrate is concentrated in vacuo and the residue is purified by flash column chromatography on NH-silica gel (Solvent; n-hexane:ethyl acetate=1:1) to give 2-(1-isopropylpiperidin-4-yl)ethanol (5.09 g, yield; 99%) as a colorless oil. MS (APCI) m/z: 172 [M+H]+ cooling cooling The mixture is stirred at room temperature for 2 hours the reaction mixture is stirred for 10 minutes filtered The filtrate is concentrated in vacuo the residue is purified by flash column chromatography on NH-silica gel (Solvent; n-hexane:ethyl acetate=1:1)

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

实验步骤: Under argon gas atmosphere, lithium aluminum hydride (1.19 g) is suspended in tetrahydrofuran (50 mL) and thereto is added dropwise a solution of ethyl (1-isopropylpiperidin-4-yl)acetate (compound obtained in Reference Example 93(1), 6.43 g) in tetrahydrofuran (50 mL) over a period of 15 minutes under ice-cooling. The mixture is stirred at room temperature for 1.5 hours. To the reaction mixture is added successively water (1.2 mL), 2N sodium hydroxide solution (2.4 mL), and water (2.4 mL) under ice-cooling. The mixture is stirred at room temperature for 2 hours. After addition of magnesium sulfate, the reaction mixture is stirred for 10 minutes and filtered. The filtrate is concentrated in vacuo and the residue is purified by flash column chromatography on NH-silica gel (Solvent; n-hexane:ethyl acetate=1:1) to give 2-(1-isopropylpiperidin-4-yl)ethanol (5.09 g, yield; 99%) as a colorless oil. MS (APCI) m/z: 172 [M+H]+ cooling cooling The mixture is stirred at room temperature for 2 hours the reaction mixture is stirred for 10 minutes filtered The filtrate is concentrated in vacuo the residue is purified by flash column chromatography on NH-silica gel (Solvent; n-hexane:ethyl acetate=1:1)