Potassium Carbonate → 4-((7-(4-chlorophenyl)-3,6-dioxo-8-(pyridin-4-yl)-2,3-dihydro-[1,2,4]triazolo[4,3-b]pyridazin-5(6H)-yl)methyl)benzonitrile

Participants

Reaction Steps

To the solution of 7-(4-chlorophenyl)-8-(pyridin-4-yl)-[1,2,4]triazolo[4,3-b]pyridazine-3,6(2H,5H)-dione (8 mg, 0.023 mmol), prepared as described in Example 9 in DMF (0.3 ml) was added K2CO3 (5 mg, 0.036 mmol) followed by 4-(bromomethyl)benzonitrile (5 mg, 0.025 mmol). After 15 min, the reaction mixture was diluted with ethyl acetate. The resultant solution was then washed with water. The organic layer was dried over Na2SO4, filtered and concentrated under reduced pressure. The crude product was purified by reverse phase HPLC to give the title compound, 4-((7-(4-chlorophenyl)-3,6-dioxo-8-(pyridin-4-yl)-2,3-dihydro-[1,2,4]triazolo[4,3-b]pyridazin-5(6H)-yl)methyl)benzonitrile, (4.2 mg, 32%) as a mono trifluoroacetate salt as a yellow foam. MS M+H=454; 1H (CD3OD) δ 8.68(2H), 7.71-7.65(6H), 7.28(2H), 7.20(2H), 5.94(2H).

Provenance & Evidence