[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15](=[O:20])[C:16]([F:19])([F:18])[F:17])=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:21][Mg]Cl.[Cl-].[NH4+]>C(OCC)C>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]([OH:20])([CH3:21])[C:16]([F:17])([F:18])[F:19])=[CH:11][CH:10]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1A solution of 30.0 g (0.107 mol) of 4-(trifluoroacetyl)phenyl benzyl ether in 50 ml of diethyl ether was added dropwise at 0° C. to a solution of 12.0 g (0.161 mol) of methylmagnesium chloride in 150 ml of diethyl ether. After 2 hours at reflux, the mixture was poured into saturated ammonium chloride solution. 31.3 g (99% of theory) were obtained of colorless product.
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