[Br-].[CH3:2][O:3][C:4]1[CH:5]=[C:6]([CH:10]([CH3:32])[CH2:11][CH2:12][P+](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[CH:7]=[CH:8][CH:9]=1.[N:33]1[CH:38]=[CH:37][C:36]([CH:39]=O)=[CH:35][CH:34]=1.[H-].[Na+]>CS(C)=O.O1CCCC1>[CH3:2][O:3][C:4]1[CH:5]=[C:6]([CH:10]([CH3:32])[CH2:11][CH:12]=[CH:39][C:36]2[CH:37]=[CH:38][N:33]=[CH:34][CH:35]=2)[CH:7]=[CH:8][CH:9]=1A mixture of 3-(3-methoxyphenyl)butyl triphenylphosphonium bromide (17.5 g., 35.4 mmoles) in dimethylsulfoxide (50 ml.) is added to 4-pyridinecarboxaldehyde (3.79 g., 35.4 mmoles) in tetrahydrofuran (40 ml.). The resulting mixture is then added dropwise to a slurry of 50% sodium hydride (1.87 g., 39 mmoles) in tetrahydrofuran (20 ml.) under a nitrogen atmosphere at 0°-5° C. Following completion of addition, the mixture is stirred for one hour at 0°-5° C. and then concentrated under reduced pressure. The concentrate is diluted with water (200 ml.) and then acidified with 6N HCl. The aqueous acid solution is extracted with benzene (4 × 50 ml.). It is then made basic and extracted with ethyl acetate (3 × 50 ml.). Evaporation of the combined extracts after drying (MgSO4) affords 4-(3-methoxyphenyl)-1-(4-pyridyl)-1-pentene as an oil.
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