Potassium Phosphate, Tribasic → 5-(4-(Trifluoromethyl)phenyl)pyridazin-3(2H)-one

Participants

Reaction Conditions

Reaction Steps

Tricyclohexyl phosphine (16.6 μL, 0.02 mmol) was added to a mixture of 5-iodopyridazin-3(2H)-one (35 mg, 0.16 mmol), 4-(trifluoromethyl)phenylboronic acid (30 mg, 0.16 mmol), potassium phosphate tribasic (117 mg, 0.55 mmol), and palladium (II) acetate (3.5 mg, 0.02 mmol) in Toluene (0.8 mL) and Water (0.3 mL). The mixture was stirred at 100° C. for 22 hours. The reaction was diluted with CH2Cl2, filtered and concentrated. The crude was purified using HPLC (Phen Luna Axia C18 5μ 10:90:0.1 to 90:10:0.1 MeOH—H2O-TFA) to afford the desired product 5-(4-(trifluoromethyl)phenyl)pyridazin-3(2H)-one 18A (14.8 mg, 0.06 mmol, 39.1% yield) as a white solid. LC/MS 282 (M+H)+, tR 0.77 min (method 5).

Provenance & Evidence