[CH2:1]([Li])CCC.[F:6][C:7]([F:19])([F:18])[CH2:8][O:9][C:10]1[CH:17]=[CH:16][C:13]([CH:14]=O)=[CH:12][N:11]=1.O>[Br-].C[P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O1CCCC1>[F:6][C:7]([F:19])([F:18])[CH2:8][O:9][C:10]1[CH:17]=[CH:16][C:13]([CH:14]=[CH2:1])=[CH:12][N:11]=1n-Butyllithium (5.14 mL, 13.4 mmol) is added to a suspension of methyltriphenylphosphonium bromide (4.41 g, 12.34 mmol) in tetrahydrofuran (51 mL) at −78° C. under nitrogen atmosphere. The reaction mixture is warmed to room temperature to yield deep red ylide solution. To ylide solution, cooling in ice, is introduced 6-(2,2,2-trifluoroethoxy)nicotinaldehyde (2.11 g, 10.3 mmol, Step-1) in tetrahydrofuran (10 mL) and stirred at room temperature for 3 hours. The reaction mixture is poured into water, extracted with ethyl acetate and dried over sodium sulfate and concentrated in vacuo. The residue is purified by column chromatography on silica gel eluting with n-hexane/ethyl acetate (10:1) to give 1.56 g (75% yield) of the title compound as colorless oil.
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