Potassium Carbonate → 5-{[1-(cyclopropylcarbonyl)-3-azetidinyl]methyl}-4-[4-(1H-indazol-6-yl)phenyl]-2,4-dihydro-3H-1,2,4-triazol-3-one

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Reaction Steps

In a microwave vial purged with nitrogen, a mixture of 4-(4-bromophenyl)-5-{[1-(cyclopropylcarbonyl)-3-azetidinyl]methyl}-2,4-dihydro-3H-1,2,4-triazol-3-one (70 mg, 0.186 mmol), 1,1′-bis(diphenylphosphino)ferrocene-palladium(II)dichloride dichloromethane complex (8 mg, 9.80 μmol), and 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indazole (50 mg, 0.205 mmol)) in 1,4-dioxane (2 mL) and 2M aq potassium carbonate (0.7 mL, 1.400 mmol) was stirred at 100° C. in an oil bath for 16 h. The reaction was cooled to room temperature and diluted with ethyl acetate (10 mL). The layers were separated and the aqueous layer was adjusted to pH˜6-6.5 using 1N aq HCl. The aqueous layer was extracted with ethyl acetate (2×30 mL). The organic layers were combined, dried over MgSO4, and concentrated in vacuo. Purification of the residue by reverse phase HPLC (10-90% acetonitrile/water+0.1% NH4OH) provided the title compound as a white solid (20 mg, 26%). MS(ES)+ m/e 415.2 [M+H]+.

Provenance & Evidence