[O:1]([C:8]1[CH:15]=[CH:14][C:11]([CH:12]=O)=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Li][CH2:17][CH2:18][CH2:19][CH3:20].C(OCC)(=[O:23])C.C([O-])(O)=O.[Na+]>C1COCC1.CCCCCC>[OH:23][CH2:17][CH2:18][CH2:19][CH2:20][CH2:12][C:11]1[CH:14]=[CH:15][C:8]([O:1][C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)=[CH:9][CH:10]=1To a solution of 4-phenoxybenzaldehyde (704 mg, 3.56 mmol) in 15 mL of THF at -78° C. was added n-BuLi dropwise (3.73 mmol, 2.5M in hexane). After 24 hours, the reaction was poured into ethyl acetate and sat. aq. NaHCO3 solution, then washed with brine, dried (Na2SO4) and concentrated in vacuo to provide the crude product.
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