Sodium Carbonate → 1-Phenyl-5-[3-(2,2,2-trifluoroethoxymethyl)phenyl]-1H-pyrazol-3-ylamine

Participants

Reaction Steps

To a solution of 5-iodo-1-phenyl-1H-pyrazol-3-ylamine (221 mg) prepared according to the same procedures as Preparation 2 in 1,2-dimethoxyethane (2.2 ml) were sequentially added 4,4,5,5-tetramethyl-2-[3-(2,2,2-trifluoroethoxymethyl)phenyl]-[1,3,2]dioxaborolane (269 mg) prepared in Preparation 28, a 2M aqueous solution of sodium carbonate (1.1 ml), tricyclohexylphosphine (43.4 mg) and palladium (II) acetate (17.4 mg) at room temperature, and the mixture was stirred at 100° C. for 12 hours. To this reaction mixture was added a saturated aqueous solution of sodium hydrogen carbonate at room temperature, and then the mixture was filtered through Celite, and subjected to elution with ethyl acetate. The filtrate was extracted with ethyl acetate, the resulting organic layer was washed with was a saturated aqueous solution of sodium chloride, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=2/1) to give the titled compound (258 mg).

Provenance & Evidence