Potassium Phosphate, Tribasic → HCID 66817324, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-(3-bromo-phenyl)-4-oxo-1,3,8-triaza-spiro[4.5]dec-1-ene-8-carboxylic acid tert-butyl ester (100 mg, 0.245 mmol), 3,5-dimethyl-isoxazole-4-boronic acid (51.8 mg, 0.367 mmol), tetrakis-(triphenylphosphine)palladium(0) (28 mg, 0.0245 mmol) and K3PO4 (104 mg, 0.490 mmol) in dioxane (1.2 mL) was heated with stirring at 100° C. for one hour in a nitrogen atmosphere. The reaction mixture was cooled, and then quenched with water and extracted with ethyl acetate (×3). The organic layers were combined and sequentially washed with water (×2) and saturated brine, and then dried over sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=2:1) to give 2-[3-(3,5-dimethyl-isoxazol-4-yl)-phenyl]-4-oxo-1,3,8-triaza-spiro[4.5]dec-1-ene-8-carboxylic acid tert-butyl ester as a pale yellow solid (88.3 mg, 85%).

Provenance & Evidence