[EN] PYRAZOLO [3,4-B] PYRIDINE COMPOUNDS, AND THEIR USE AS PHOSPHODIESTERASE INHIBITORS<br/>[FR] COMPOSES PYRAZOLO [3,4-B] PYRIDINE ET LEUR UTILISATION EN TANT QU'INHIBITEURS DE LA PHOSPHODIESTERASE
申请人:GLAXO GROUP LTD
公开号:WO2005058892A1
公开(公告)日:2005-06-30
The invention provides a compound of formula (I) or a salt thereof, wherein Ar has the sub-formula (x) or (z) and wherein R3 is optionally substituted C3-8cycloalkyl, optionally substituted C5-7 cycloalkenyl, an optionally substituted heterocyclic group (aa), (bb) or (cc), or a bicyclic group (ee); and wherein R4 is H, C1-3 alkyl, C1-2fluoroalkyl, cyclopropyl, CH2OR4a, CH(Me)OR4a, or CH2CH2OR4a; and R5 is inter alia H, C1-8alkyl, C1-8fluoroalkyl, C3-8 cycloalkyl, certain substituted alkyl groups, -(CH2)n13- Het, or optionally substituted phenyl or CH2-Ph; or R4 and R5 taken together are -(CH2)p1- or (CH2)p3 X5 (CH2)p4- ; provided that at least one of R4 and R5 is not a hydrogen atom (H). The invention also provides the use of the compounds as inhibitors of phosphodiesterase type IV (PDE4) and/or for the treatment and/or prophylaxis of inflammatory and/or allergic diseases such as chronic obstructive pulmonary disease (COPD), asthma, rheumatoid arthritis, allergic rhinitis or atopic dermatitis.