SUBSTITUTED PYRAZOLOPYRIMIDINES, A PROCESS FOR THEIR PREPARATION AND THEIR USE AS MEDICINE

摘要

Substituted pyrazolopyrimidine derivatives of formula (I) wherein Y1, Y2, Y3, Y4 represent N or C-, whereby at least two of the groups Y1 to Y4 denot e a carbon atom, R1 represents chloro or bromo, R2 to R7 represent e.g. hydr ogen, methyl or ethyl; and R10 and R11 independent ly represent e.g. hydroge n or C1-C6alkyl, are potent mGluR5 modulators and are useful for the prevent ion of acute and chronic neurological disorders.