8-Hydroxyquinoline → 3-(2,5-Dimethylpyrrol-1-yl)-1-(3-fluorophenyl)-1H-pyrazole

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-(2,5-dimethylpyrrol-1-yl)-1H-pyrazole (6.8 g) in N-methyl-2-pyrrolidone (68 ml) were sequentially added cesium carbonate (27.4 g), 8-quinolinol (1.2 g), copper oxide (I) (0.6 g) and 1-fluoro-3-iodobenzene (7.4 ml), and the mixture was stirred at 110° C. for 2 hours. This reaction mixture was cooled to room temperature, and toluene (80 ml) was added thereto, and then the mixture was filtered through Celite. After adding a 1M aqueous solution of sodium hydroxide (80 ml) to the filtrate, the mixture was extracted with toluene. The resulting organic layer was sequentially washed with water and a saturated aqueous solution of sodium chloride, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=9/1) to give the titled compound (10.4 g).

Provenance & Evidence