[Cl:1][C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][C:9]=1[OH:10])[CH:5]=O.[Cl-].O[NH3+:13]>>[Cl:1][C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][C:9]=1[OH:10])[C:5]#[N:13]The title compound was prepared from 3-chloro-4-hydroxybenzaldehyde and hydroxyl ammonium chloride, using the same method as that described for preparation 70. The title compound was purified by column chromatography on silica gel, eluting with pentane:ethyl acetate, 100:0 to 90:10, to afford the title compound as a white solid in 76% yield.
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