C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N1C=CN=C1.[Br:25]Br.O[CH2:28][CH2:29][C:30]1[CH:35]=[CH:34][C:33]([O:36][CH3:37])=[C:32]([F:38])[CH:31]=1>C(Cl)Cl>[Br:25][CH2:28][CH2:29][C:30]1[CH:35]=[CH:34][C:33]([O:36][CH3:37])=[C:32]([F:38])[CH:31]=1
A mixture of resin bound triphenyl phosphine (polystyrene 2% cross linking, loading=3 mmol/g, 3 g, 9 mmol) and imidazole (0.48 g, 7.1 mmol) in DCM (30 mL) cooled on an ice bath was drop wise added Br2 (1.13 g, 7.1 mmol), whereupon a solution of 4-(2-hydroxy-ethyl)-2-fluoro-1-methoxy-benzene (1.0 g, 5.88 mmol) in DCM (5 mL) was added. The cooling bath was removed and the reaction mixture was stirred for 16 hs before the resin was filtered off. The resin was washed with DCM and the filtrate was concentrated in vacuo. The residue was purified using column chromatography (SiO2, heptane-EtAOc 95:5) to give 0.82 g of 4-(2-bromo-ethyl)-2-fluoro-1-methoxy-benzene
Wird geladen…
