The present invention relates to the use of pyrimidylaminobenzamide compounds for the preparation of a drug for the treatment of diseases that respond to modulation of kinase, especially tie-2 kinase, activity, especially for the curative and/or prophylactic treatment of leukemia, myelodysplastic syndromes or pulmonary hypertension, and to a method of treating diseases that respond to modulation of kinase activity, especially tie-2 kinase activity.