Trifluoroacetic acid → 2-(((Tert-butyldimethylsilyl)oxy)methyl)-1-(oxetan-3-yl)piperazine
反応式
[Si:1]([O:8][CH2:9][CH:10]1[N:15]([CH:16]2[CH2:19][O:18][CH2:17]2)[CH2:14][CH2:13][N:12](C(OC(C)(C)C)=O)[CH2:11]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].C(O)(C(F)(F)F)=O>C(Cl)Cl>[Si:1]([O:8][CH2:9][CH:10]1[CH2:11][NH:12][CH2:13][CH2:14][N:15]1[CH:16]1[CH2:19][O:18][CH2:17]1)([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]参加物
4
実験手順
Tert-butyl 3-(((tert-butyldimethylsilyl)oxy)methyl)-4-(oxetan-3-yl)piperazine-1-carboxylate (714 mg, 1.847 mmol) was taken up in DCM (8 mL) and TFA (2.85 mL, 36.9 mmol) was added. The reaction was stirred at room temperature for 30 min. The solvent was removed in vacuo and the material was dissolved in MeOH. The solution was loaded onto an SCX column (3×5 g, benzenesulfonic acid sorbent) and the columns were flushed with MeOH, then 7N NH3/MeOH to release the product. (+/−)2-(((tert-butyldimethylsilyl)oxy)methyl)-1-(oxetan-3-yl)piperazine (517 mg) was obtained as a yellow oil.