The present invention provides novel 4,5-disubstituted-7 H -pyrrolo[2,3- d ]pyrimidine derivatives of Formula I, and the pharmaceutically acceptable salts thereof wherein R 1 , R 2 , R 3 , R 4 and R 5 are as defined in the specification. The invention is also directed to pharmaceutical compositions comprising the compounds of formula I and to use of the compounds in the treatment of diseases associated with LRRK2, such as neurodegenerative diseases including Parkinson's disease or Alzheimer's disease, cancer, Crohn's disease or leprosy.