反应详情

To a solution of 2-(4-phenylpiperazine-1-carbonyloxymethyl)-morpholine-4-carboxylic acid tert-butyl ester (6.67 g, 16.5 mmol) in MeOH (10 mL) was added 2M HCl in Et2O solution (16.5 mL, 32.9 mmol). The brown solution was stirred at room temperature overnight. The reaction mixture was concentrated in vacuo. The residue purified by reverse phase column chromatography (LiChroprep RP-18, 40-63 μm, 460×26 mm (100 g), 30 mL/min, gradient 0% to 15% (over 75 min) MeOH in water with 0.1% TFA). The pure sample was stirred in a 4M aq HCl solution (20 mL) overnight before being concentrated in vacuo. The resulting yellow oil was washed with heptane, concentrated in vacuo and dried in a vacuum oven overnight to give the morpholin-2-ylmethyl 4-phenylpiperazine-1-carboxylate dihydrochloride salt (4.72 g, 76%) as a pale yellow solid.

1. concentrationThe reaction mixture was concentrated in vacuo
2. customThe residue purified by reverse phase column chromatography (LiChroprep RP-18, 40-63 μm, 460×26 mm (100 g), 30 mL/min, gradient 0% to 15% (over 75 min) MeOH in water with 0.1% TFA)
3. stirringThe pure sample was stirred in a 4M aq HCl solution (20 mL) overnight
4. concentrationbefore being concentrated in vacuo
5. washThe resulting yellow oil was washed with heptane
6. concentrationconcentrated in vacuo
7. customdried in a vacuum oven overnight