OS(C(F)(F)F)(=O)=O.C1([Si](C2C=CC=CC=2)(C)C)C=CC=CC=1.C(N(C(C)C)CC)(C)C.[F:33][C:34]1[CH:39]=[CH:38][C:37]([C:40](=[O:42])[CH3:41])=[CH:36][CH:35]=1.[C:43]([C:45]1[CH:46]=[C:47]([CH:50]=[CH:51][CH:52]=1)[CH:48]=O)#[N:44].C(=O)(O)[O-].[Na+]>ClCCl>[F:33][C:34]1[CH:39]=[CH:38][C:37]([C:40](=[O:42])[CH:41]=[CH:48][C:47]2[CH:46]=[C:45]([CH:52]=[CH:51][CH:50]=2)[C:43]#[N:44])=[CH:36][CH:35]=1Triflic acid (3.2 g, 21 mmol) is added portionwise to diphenyldimethylsilane (2.22 g, 10.5 mmol) in 20 mL of dichloromethane and stirred for 1 hour. After cooling to -78° C., diisopropylethylamine (1.42 g, 11 mmol) and 4'-fluoroacetophenone (1.38 g, 10 mmol) are added and the reaction mixture stirred for another hour before adding 3-cyanobenzaldehyde (1.0 g, 7.62 mmol). After the reaction mixture is stirred 18 hours, it is diluted with 100 mL of dichloromethane and stirred 1 hour with a saturated solution of sodium bicarbonate. The organic layer is separated, dried (MgSO4), concentrated and columned over SiO2 eluting with dichloromethane to provide 0.8 g of the title compound; mp 170°-172° C.
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