Br[CH2:2][C:3]([C:5]1[CH:10]=[CH:9][CH:8]=[C:7]([Br:11])[CH:6]=1)=[O:4].[NH:12]1[CH2:16][CH2:15][CH2:14][CH2:13]1.O>CCOCC>[Br:11][C:7]1[CH:6]=[C:5]([C:3](=[O:4])[CH2:2][N:12]2[CH2:16][CH2:15][CH2:14][CH2:13]2)[CH:10]=[CH:9][CH:8]=12-bromo-1-(3-bromophenyl)ethanone (4.0 g, 14.39 mmol) in anhydrous ether (50 mL) was added dropwise to a solution of pyrrolidine (2.05 g, 28.78 mmol) in anhydrous ether (20 mL) at 0° C. The reaction mixture was then warmed to room temperature. After stirring for 2 h, water (80 mL) was added and the aqueous layer was extracted with ethyl acetate (2×80 mL). The combined organic layers were dried over MgSO4 and concentrated to yield 1-(3-bromophenyl)-2-(1-pyrrolidinyl)ethanone as a light yellow oil (3.6 g, 94%), which was used without purification. MS (ES) m/e 268 [M+H]+.
Wird geladen…