Novel imidazo [4,5-b] pyridine as inhibitors of glycogen synthase kinase 3, for use in the treatment of dementia and neurodegenerative disorders

The present invention relates to novel compounds of formula (I), wherein X is or Y; as a free base or a pharmaceutically acceptable salt, solvate or solvate of a salt thereof, a process for their preparation and new intermediates used in this process, to pharmaceutical formulations containing said therapeutically active compounds and the use of said active compounds in therapy.