[N+]([C:4]1[CH:11]=[C:10]([C:12]([F:15])([F:14])[F:13])[CH:9]=[CH:8][C:5]=1[C:6]#[N:7])([O-])=O.[O-:16][CH2:17][CH3:18].[Na+].O>C(O)C>[CH2:17]([O:16][C:4]1[CH:11]=[C:10]([C:12]([F:15])([F:14])[F:13])[CH:9]=[CH:8][C:5]=1[C:6]#[N:7])[CH3:18]To a solution of 2-nitro-4-trifluoromethyl-benzonitrile (71.7 g, 318.5 mmol) in anhydrous ethanol (400 mL) at room temperature was added sodium ethoxide (238 mL, 637 mmol, 21% solution in ethanol) dropwise over a period of 30 min. The reaction mixture was stirred at room temperature for 1 h. Water (1 L) was added, and the mixture was stirred for 15 min. The solids were filtered off, washed with water, and dried in the vacuum oven (40° C.) overnight to give 2-ethoxy-4-trifluoromethyl-benzonitrile (64 g, 93% yield).
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