1,3-Dibromopropane → 3-Phenyl-6-(3-bromopropyloxy)-7-propylbenzofuran

Reaktionsgleichung

[C:1]1([C:7]2[C:11]3[CH:12]=[CH:13][C:14]([OH:19])=[C:15]([CH2:16][CH2:17][CH3:18])[C:10]=3[O:9][CH:8]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C(=O)([O-])[O-].[K+].[K+].[Br:26][CH2:27][CH2:28][CH2:29]Br>C(C(C)=O)C>[C:1]1([C:7]2[C:11]3[CH:12]=[CH:13][C:14]([O:19][CH2:29][CH2:28][CH2:27][Br:26])=[C:15]([CH2:16][CH2:17][CH3:18])[C:10]=3[O:9][CH:8]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Komponenten

Versuchsvorschrift

To a solution of 3-phenyl-6-hydroxy-7-propylbenzofuran (3.54 g, 13.99 mmol) and potassium carbonate (2.08 g, 15.05 mmol) in dry methyl ethyl ketone (50 ml) was added 1,3-dibromopropane (2.84 ml, 27.98 mmol). The reaction mixture refluxed for 5 hours under nitrogen. The mixture was partitioned between isopropyl acetate and pH4 buffer. The organic was dried over sodium sulfate. The solvent was removed under reduced pressure, and the residue was purified by chromatography (silica gel, 50% methylene chloride in hexane) to afford the title compound.