The invention relates to 4-amino-6-phenyl-pyrrolo[2,3-d]pyrimidine derivatives, and also relates to 7H-pyrrolo[2,3-d]pyrimidine derivatives of formula I wherein the symbols and substituents are as defined in the description, to processes for the preparation thereof, to pharmaceutical compositions comprising such derivatives and to the use of such derivatives-alone or in combination with one or more other pharmaceutically active compounds-for the preparation of pharmaceutical compositions for the treatment especially of a proliferative disease, such as a tumour.