C([O:8][C:9]1[C:16]([O:17][CH3:18])=[C:15]([O:19][CH3:20])[CH:14]=[CH:13][C:10]=1[C:11]#[N:12])C1C=CC=CC=1>[Pd].C(O)C>[OH:8][C:9]1[C:16]([O:17][CH3:18])=[C:15]([O:19][CH3:20])[CH:14]=[CH:13][C:10]=1[C:11]#[N:12]10% palladium on charcoal (2.0 g) was added to a solution of 2-benzyloxy-3,4-dimethoxybenzonitrile (20.8 g, 0.077 mol) in ethanol (250 ml) and the reaction stirred under a hydrogen atmosphere of 414 kPa (60 p.s.i.) for 4 hours. On cooling, the mixture was filtered through Arbocel™, washing with further ethanol. The filtrate was evaporated under reduced pressure to give the subtitle compound as a yellow solid (13.37 g, 97%). Rf 0.19 (dichloromethane). MS m/z 197 (MNH4)+.
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