p-Toluenesulfonic acid → HCID 178463003, compound

Participants

Reaction Steps

To a solution of 3-(4-fluorophenyl)-1H-1,2,4-triazol-5-amine (100 mg, 0.56 mmol) in diphenyl ether (1 ml) was added ethyl 3-(1-ethyl-1H-indazol-5-yl)-3-oxopropanoate (400 mg, 1.540 mmol) and TsOH (6 mg, 0.03 mmol), and the resulting mixture was strirred for 2.5 h at 170° C. The reaction mixture was then quenched by the addition of ethyl ether (8 ml). The solids were collected by filtration and washed with dichloromethane (5 ml) to afford 5-(1-ethyl-1H-indazol-5-yl)-2-(4-fluorophenyl)-[1,2,4]triazolo[1,5-α]pyrimidin-7(4H)-one as a light yellow solid (69 mg, 24%).

Provenance & Evidence