2-Bromo-1-(4-fluorophenyl)ethan-1-one → Tert-butyl 4-[2-(4-fluorophenyl)-2-oxoethyl]piperazine-1-carboxylate
반응식
[N:1]1([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]1.Br[CH2:15][C:16]([C:18]1[CH:23]=[CH:22][C:21]([F:24])=[CH:20][CH:19]=1)=[O:17]>CN(C=O)C>[F:24][C:21]1[CH:22]=[CH:23][C:18]([C:16](=[O:17])[CH2:15][N:4]2[CH2:5][CH2:6][N:1]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[CH2:2][CH2:3]2)=[CH:19][CH:20]=1참가 물질
4
실험 절차
tert-Butyl piperazine-1-carboxylate (5.00 g, 26.8 mmol) and 2-bromo-1-(4-fluorophenyl)ethanone (6.99 g, 32.2 mmol) were dissolved in DMF (5 mL) and stirred for 10 min at room temperature. The crude material was purified by column chromatography eluting with a mixture of DCM and MeOH to afford the title compound (3.50 g) as an oil. 1H NMR (Acetonitrile-d3, 400 MHz) δ 1.42 (s, 9H) 2.47 (t, J=5.0 Hz, 4H), 3.36 (t, J=5.0 Hz, 4H), 3.77 (s, 2H), 7.20 (t, J=8.8, 2H), 8.07 (td, J=2.0, 8.8 Hz, 2H). Exact mass calculated for C17H23FN2O3: 322.2. Found: LCMS m/z=323.4 (M+H+).