Abstract: Compounds of Formula (1.0.0): are described wherein A is for example aryl, heteroaryl or heterocyclyl, Y is preferably —C(═O)—; B is independently selected from a group of moieties, the most preferred of which are those of partial Formulas (1.1.2) and (1.1.6): and E is a single bond; oxygen; 1,1-cyclopropyl; C(CH3)2; CF2; or a bridging moiety of partial Formula (1.9.0): where R1a is hydrogen when R1 has the meaning of a mono-valent substituent; and R1a is a single bond when R1 has the meaning of a di-valent substituent. Said compounds are useful in methods of treating or preventing an inflammatory, autoimmune or respiratory diseases by inhibiting cell adhesion and consequent or associated pathogenic processes subsequently mediated by VLA-4.

Abstract: This invention relates to 4-substituted catechol diether compounds which are selective inhibitors of phosphodiesterase (PDE) type IV. The compounds of the present invention are useful in inhibiting PDE.sub.IV and in the treatment of AIDS, asthma, bronchitis, chronic obstructive airways disease, psoriasis, allergic rhinitis, dermatitis and other inflammatory diseases. This invention also relates to pharmaceutical compositions comprising the compounds hereof.