(S)-3-IsopropylMorpholine HCl

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

Procedure: Ethyl vinyl ether (1.68 mL, 17.5 mmol) and trifluoroacetic acid (0.1 mL) were added sequentially to a solution of (R)-6-hydroxymethylpiperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485–3496, 1.62 g, 12.5 mmol) in CHCl3 (10 mL) at rt. The reaction mixture was stirred at rt for 18 h, then saturated aqueous NaHCO3 (100 mL) was added and the mixture was extracted with CH2Cl2 (3×75 mL). The combined organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient) afforded 2.03 g (80%) of (R)-6-(1-ethoxyethoxymethyl)-piperidin-2-one. the mixture was extracted with CH2Cl2 (3×75 mL) The combined organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient)

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

Procedure: Imidazole (773 mg, 11.4 mmol) and tert-butyldimethylsilyl chloride (787 mg, 5.22 mmol) were added sequentially to a solution of (R)-6-hydroxymethyl-piperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485–3496, 613 mg, 4.75 mmol) in DMF (8 mL) at 0° C. The reaction mixture was allowed to warm to rt and was stirred at rt for 20 h. Benzene and EtOAc (3:7, 200 mL) was added and the solution was washed with brine (3×50 mL). The organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient) afforded 1.13 g (98%) of (R)-6-(tert-butyldimethylsilanyloxymethyl)-piperidin-2-one as a white solid. the solution was washed with brine (3×50 mL) The organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient)

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

Procedure: Ethyl vinyl ether (1.68 mL, 17.5 mmol) and trifluoroacetic acid (0.1 mL) were added sequentially to a solution of (R)-6-hydroxymethylpiperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485-3496, 1.62 g, 12.5 mmol) in CHCl3 (10 mL) at rt. The reaction mixture was stirred at rt for 18 h, then saturated aqueous NaHCO3 (100 mL) was added and the mixture was extracted with CH2Cl2 (3×75 mL). The combined organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient) afforded 2.03 g (80%) of (R)-6-(1-ethoxyethoxymethyl)-piperidin-2-one. the mixture was extracted with CH2Cl2 (3×75 mL) The combined organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient)

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

Procedure: Ethyl vinyl ether (1.68 mL, 17.5 mmol) and trifluoroacetic acid (0.1 mL) were added sequentially to a solution of (R)-6-hydroxymethylpiperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485–3496, 1.62 g, 12.5 mmol) in CHCl3 (10 mL) at rt. The reaction mixture was stirred at rt for 18 h, then saturated aqueous NaHCO3 (100 mL) was added and the mixture was extracted with CH2Cl2 (3×75 mL). The combined organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient) afforded 2.03 g (80%) of (R)-6-(1-ethoxyethoxymethyl)-piperidin-2-one. the mixture was extracted with CH2Cl2 (3×75 mL) The combined organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient)

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

Procedure: Ethyl vinyl ether (1.68 mL, 17.5 mmol) and trifluoroacetic acid (0.1 mL) were added sequentially to a solution of (R)-6-hydroxymethylpiperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485–3496, 1.62 g, 12.5 mmol) in CHCl3 (10 mL) at rt. The reaction mixture was stirred at rt for 18 h, then saturated aqueous NaHCO3 (100 mL) was added and the mixture was extracted with CH2Cl2 (3×75 mL). The combined organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient) afforded 2.03 g (80%) of (R)-6-(1-ethoxyethoxymethyl)-piperidin-2-one. the mixture was extracted with CH2Cl2 (3×75 mL) The combined organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient)

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

Procedure: Imidazole (773 mg, 11.4 mmol) and tert-butyldimethylsilyl chloride (787 mg, 5.22 mmol) were added sequentially to a solution of (R)-6-hydroxymethyl-piperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485–3496, 613 mg, 4.75 mmol) in DMF (8 mL) at 0° C. The reaction mixture was allowed to warm to rt and was stirred at rt for 20 h. Benzene and EtOAc (3:7, 200 mL) was added and the solution was washed with brine (3×50 mL). The organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient) afforded 1.13 g (98%) of (R)-6-(tert-butyldimethylsilanyloxymethyl)-piperidin-2-one as a white solid. the solution was washed with brine (3×50 mL) The organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient)

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

Procedure: Ethyl vinyl ether (1.68 mL, 17.5 mmol) and trifluoroacetic acid (0.1 mL) were added sequentially to a solution of (R)-6-hydroxymethylpiperidin-2-one (prepared from D-□-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485-3496, 1.62 g, 12.5 mmol) in CHCl3 (10 mL) at rt. The reaction mixture was stirred at rt for 18 h, then saturated aqueous NaHCO3 (100 mL) was added and the mixture was extracted with CH2Cl2 (3×75 mL). The combined organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient) afforded 2.03 g (80%) of (R)-6-(1-ethoxyethoxymethyl)-piperidin-2-one. the mixture was extracted with CH2Cl2 (3×75 mL) The combined organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient)

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

Procedure: Imidazole (773 mg, 11.4 mmol) and tert-butyldimethylsilyl chloride (787 mg, 5.22 mmol) were added sequentially to a solution of (R)-6-hydroxymethyl-piperidin-2-one (prepared from D-□-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485-3496, 613 mg, 4.75 mmol) in DMF (8 mL) at 0° C. The reaction mixture was allowed to warm to rt and was stirred at rt for 20 h. Benzene and EtOAc (3:7, 200 mL) was added and the solution was washed with brine (3×50 mL). The organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient) afforded 1.13 g (98%) of (R)-6-(tert-butyldimethylsilanyloxymethyl)-piperidin-2-one as a white solid. the solution was washed with brine (3×50 mL) The organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient)

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

Procedure: Ethyl vinyl ether (1.68 mL, 17.5 mmol) and trifluoroacetic acid (0.1 mL) were added sequentially to a solution of (R)-6-hydroxymethylpiperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485-3496, 1.62 g, 12.5 mmol) in CHCl3 (10 mL) at rt. The reaction mixture was stirred at rt for 18 h, then saturated aqueous NaHCO3 (100 mL) was added and the mixture was extracted with CH2Cl2 (3×75 mL). The combined organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient) afforded 2.03 g (80%) of (R)-6-(1-ethoxyethoxymethyl)-piperidin-2-one. the mixture was extracted with CH2Cl2 (3×75 mL) The combined organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient)

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

Procedure: Ethyl vinyl ether (1.68 mL, 17.5 mmol) and trifluoroacetic acid (0.1 mL) were added sequentially to a solution of (R)-6-hydroxymethylpiperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485–3496, 1.62 g, 12.5 mmol) in CHCl3 (10 mL) at rt. The reaction mixture was stirred at rt for 18 h, then saturated aqueous NaHCO3 (100 mL) was added and the mixture was extracted with CH2Cl2 (3×75 mL). The combined organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient) afforded 2.03 g (80%) of (R)-6-(1-ethoxyethoxymethyl)-piperidin-2-one. the mixture was extracted with CH2Cl2 (3×75 mL) The combined organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→4% MeOH/CH2Cl2, gradient)

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

Procedure: Imidazole (773 mg, 11.4 mmol) and tert-butyldimethylsilyl chloride (787 mg, 5.22 mmol) were added sequentially to a solution of (R)-6-hydroxymethyl-piperidin-2-one (prepared from D-α-aminoadipic acid according to Huang, et al., Synth. Commun. 1989, 19, 3485–3496, 613 mg, 4.75 mmol) in DMF (8 mL) at 0° C. The reaction mixture was allowed to warm to rt and was stirred at rt for 20 h. Benzene and EtOAc (3:7, 200 mL) was added and the solution was washed with brine (3×50 mL). The organic phase was dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient) afforded 1.13 g (98%) of (R)-6-(tert-butyldimethylsilanyloxymethyl)-piperidin-2-one as a white solid. the solution was washed with brine (3×50 mL) The organic phase was dried (Na2SO4) filtered concentrated in vacuo Purification of the residue by flash column chromatography on silica gel (CH2Cl2→3% MeOH/CH2Cl2, gradient)