[Br:1][C:2]1[CH:9]=[CH:8][C:5]([CH2:6]Br)=[CH:4][CH:3]=1.[CH:10]([NH:13][CH:14]([CH3:16])[CH3:15])([CH3:12])[CH3:11].C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O>[Br:1][C:2]1[CH:9]=[CH:8][C:5]([CH2:6][N:13]([CH:14]([CH3:16])[CH3:15])[CH:10]([CH3:12])[CH3:11])=[CH:4][CH:3]=1A mixture of 4-bromobenzylbromide (5.0 g), N,N-diisopropylamine (7.85 ml) and potassium carbonate (2.76 g) in dimethylformamide (50 ml) was stirred at 80° C. for 2 hours. To the mixture was added water, and the mixture was extracted with ether. The extract was washed with water, dried (MgSO4) and concentrated to give the title compound (5.0 g).
Wird geladen…