¬1,7 NAPHTHYRIDINES AS PDE4 INHIBITORS

摘要

Compounds of formula I in free or salt form, wherein R1, R2 and R3 have the meanings as indicated in the specification, are useful for treating conditions mediated by of phosphodiesterase type 4 or the down-regulation or inhibition of TNF-alpha release, particularly obstructive or inflammatory airways diseases. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described.