An optimized procedure is given for the synthesis of novel 3-(arylamino)-1,2,4-triazin-5-one building blocks from commercially available material. By employing these building blocks, a practical protocol is described for the functionalization of the 5-position of the triazine core with anilines orphenols.
The present invention relates to HIV replication inhibitors of formula (I) as defined in the specification their use as a medicine, their processes for preparation and pharmaceutical compositions comprising them.