abstract |
The present invention relates to a pyrazolopyrimidine derivative of formula (I), wherein R 1 represents chloro or bromo; A is (a); (b); (c); (d); or (E), as well as their pharmaceutically acceptable salts. The invention further relates to a process for the preparation of such compounds. The compounds of the present invention are modulators of mGluR5 and are therefore useful for the control and prevention of acute and / or chronic nervous system disorders. [Chemical 1] |