To a solution of 5-(4-Boc-piperazin-1-yl)-3-chloro[1,2,4]triazine 151 (50 mg, 0.167 mmol.) in anhydrous DMF (3 mL) was added 3-methyl-5-trimethylstannanylindazole 152 (49 mg, 0.166 mmol.), tris(dibenzylideneacetone)dipalladium (15 mg, 0.016 mmol.), tri-o-tolylphosphine (10 mg, 0.033 mmol.) and triethylamine (17 mg, 0.168 mmol.). The reaction mixture was heated in a microwave reactor at 180° C. for 20 minutes. Ethyl acetate (50 mL) was added. The organic layer was washed with water and brine. The organic layer was filtered through Celite and dried over sodium sulfate. The organic solvent was evaporated under reduced pressure. The crude product was purified by RP-HPLC to yield the desired 3-(3-methylindazol-5-yl)-5-(4-Boc-piperazin-1-yl)-[1,2,4]triazine 153 (5.1 mg, 0.013 mmol.).
