The present invention concerns 2,6-quinolinyl and 2,6-naphthyl derivatives of formula (I), processes for preparing them, pharmaceutical compositions containing them and their use as pharmaceuticals for the treatment of VLA-4 dependent inflammatory diseases such as for example asthma, allergic rhinitis, sinusitis, conjunctivitis, food allergy, psoriasis, urticaria, pruritus, eczema, rheumatoid arthritis, inflammatory bowel disease, multiple sclerosis and atherosclerosis. Formula (I): wherein X is N or CH.