反应详情

6-(4-(Trifluoromethoxy)phenyl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one (50.0 mg, 0.169 mmol), (3-cyclopropyl-1-methyl-1H-pyrazol-5-yl)methanol (38.6 mg, 0.2535, 1.5 equiv.) and PPh3 (60.5 mg, 0.2535 mmol, 1.5 equiv.) were placed in a 50 mL round bottomed flask under a nitrogen atmosphere. To the flask were added THF (3 mL) and diethyl azodicarboxylate (40% in toluene, 110.5 mg, 0.2535 mmol, 1.5 equiv.) at room temperature. The reaction mixture was stirred at the same temperature for 4 h. The reaction mixture was directly loaded onto prep-HPLC to give 2-((3-cyclopropyl-1-methyl-1H-pyrazol-5-yl)methyl)-6-(4-(trifluoromethoxy)phenyl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one as light yellow crystals. FTIR (ATR) 1710 cm−1 (CO).