反应详情

(S)-(4-Methyl-morpholin-2-yl)-methanol (Intermediate 10; 100 mg, 0.76 mmol) was added to a suspension of NaH (60% dispersion in oil; 90.0 mg, 2.28 mmol) in anhydrous THF (7 mL) and stirred under nitrogen for 30 min. 4-(4-Fluorophenyl)-piperazine-1-carboxylic acid 4-nitrophenyl ester (Intermediate 6; 314 mg, 0.91 mmol) was added and the reaction mixture was stirred at room temperature for 48 h. The reaction mixture was filtered through celite and the solid washed with THF (10 mL). The filtrates were combined and the solvent removed in vacuo. The residue was purified by column chromatography (normal phase silica, 5 g Isolute-Si column, gradient 1-5% MeOH in DCM) and the solvents were removed in vacuo to give [(2S)-4-methylmorpholin-2-yl]methyl 4-(4-fluorophenyl)-piperazine-1-carboxylate (130 mg, 51%) as a light brown solid.

1. stirringthe reaction mixture was stirred at room temperature for 48 h
2. filtrationThe reaction mixture was filtered through celite
3. washthe solid washed with THF (10 mL)
4. customthe solvent removed in vacuo
5. customThe residue was purified by column chromatography (normal phase silica, 5 g Isolute-Si column, gradient 1-5% MeOH in DCM)
6. customthe solvents were removed in vacuo