Compounds useful for the preparation of medicaments with phosphodiesterase IV inhibitory activity

Formula (I) compounds

• 8
• where:
• R1 and R2, which may be the same or different, are halogen, hydroxy, straight or branched C1-C4 alkoxy, C5-C6 cycloalkoxy;
• X is —(CH2)n—, —CO—(CH2)n—, where n is 1 or 2, or X is —CH═;
• R3 is —OH, —NHOH, straight or branched C1-C4 alkoxy;
• Y is H, —(CH2)nCOR4, —COR4, —NHR5, where R4 is —OH, —NHOH, straight or branched C1-C4 alkoxy, R5 is H, C1-C4 alkanoyl optionally substituted by halogens;
• n is an integer between 1 and 4, extremes included;
• their enantiomers, diastereoisomers and mixtures of the same, and their pharmaceutically acceptable salts.