[Cu][C:2]#[N:3].[CH3:4][O:5][C:6]1[CH:15]=[C:14]([CH:16]([CH3:18])[CH3:17])[C:13](Br)=[CH:12][C:7]=1[C:8]([O:10][CH3:11])=[O:9].C(OCC)(=O)C>CN1CCCC1=O>[CH3:4][O:5][C:6]1[CH:15]=[C:14]([CH:16]([CH3:18])[CH3:17])[C:13]([C:2]#[N:3])=[CH:12][C:7]=1[C:8]([O:10][CH3:11])=[O:9]Copper (I) cyanide (550 mg, 6 mmol) was added to a solution of methyl 2-methoxy-5-bromo-4-iso-propylbenzoate (861 mg) in N-methyl-2-pyrolidinone (30 ml). The mixture was stirred under argon and boiled under reflux for 4 h. The mixture was cooled, poured into excess ice/water and ethyl acetate and filtered. The organic phase was separated, washed with water, brine and dried (MgSO4). Evaporation gave a crude brown solid which was purified by chromatography on silica gel eluting with ethyl acetate/n-hexane (1:4). The product was obtained as a white solid (523 mg).
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