[OH:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=1.[H-].[Na+].Cl[CH2:13][C:14]#[N:15].[Cl-].[NH4+]>CN(C)C=O>[CH:6]([C:5]1[CH:8]=[CH:9][C:2]([O:1][CH2:13][C:14]#[N:15])=[CH:3][CH:4]=1)=[O:7]4-Hydroxybenzaldehyde (244 mg, 2.00 mmol) in N,N-dimethylformamide (5 mL) was mixed with sodium hydride (60 wt % dispersion in liquid paraffin, 120 mg, 3.00 mmol) and chloroacetonitrile (189 μL, 3.00 mmol) under cooling with ice and then stirred at 50° C. for 3 hours. The reaction mixture was allowed to cool to room temperature and mixed with saturated aqueous ammonium chloride and extracted with ethyl acetate. The organic layer was washed with 1M aqueous sodium hydroxide, dried over anhydrous sodium sulfate and concentrated under reduced pressure to give the title compound as a brown oil (128 mg, yield 40%).
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