[Cl:1][C:2]1[CH:3]=[C:4]([OH:15])[CH:5]=[C:6]([Cl:14])[C:7]=1[O:8][CH2:9][CH2:10][CH2:11][CH2:12][OH:13].[Cl:16][C:17](Cl)([Cl:21])[CH2:18][CH2:19]Cl.C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C>[Cl:16][C:17]([Cl:21])=[CH:18][CH2:19][O:15][C:4]1[CH:3]=[C:2]([Cl:1])[C:7]([O:8][CH2:9][CH2:10][CH2:11][CH2:12][OH:13])=[C:6]([Cl:14])[CH:5]=1This compound was prepared in a manner analogous to that of Step D of Example 1, using 9.3 grams (0.036 mole) of 3,5-dichloro-4-(4-hydroxybutoxy)phenol, 7.7 grams (0.042 mole) of 1,1,1,3-tetrachloropropane and 11.7 grams (0.080 mole) of potassium carbonate in 300 mL of DMF. The crude product was purified with column chromatography on silica gel using mixtures of 1:4 and 1:1 ethyl acetate and hexane as eluants. The appropriate fractions were combined and concentrated under reduced pressure, yielding 8.0 grams of the subject compound. The NMR spectrum was consistent with the proposed structure.
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