Toluene → 4-Fluorophenyl-6-isopropyl-5-methoxycarbonyl-2-trifluoromethanesulfonyloxypyrimidine

Participants

Reaction Conditions

Reaction Steps

In a 300 mL-volume glass flask equipped with a stirrer, a thermometer and a reflux condenser were placed 2.9 g (10.0 mmol.) of 4-(4-fluorophenyl)-2-hydroxy-6-isopropyl-5-methoxycarbonylpyrimidine, 1.7 g (16.8 mmol.) of triethylamine, and 50 mL of toluene. The mixture in the flask was chilled to 0° C. in an ice bath. To the chilled mixture was slowly added 2.4 g (14.1 mmol.) of trifluoromethanesulfonyl chloride, and the resulting mixture was subjected to reaction for 3 hours at the same temperature. After the reaction was complete, to the reaction mixture was added 30 mL of water. From the aqueous reaction mixture, an organic liquid portion was separated. The organic liquid portion was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (column: Wako Gel C-200, eluent: hexane/ethyl acetate (8:2, volume ratio)). There was obtained 2.8 g of 4-(4-fluorophenyl)-6-isopropyl-5-methoxycarbonyl-2-trifluoromethanesulfonyloxypyrimidine having the below-mentioned characteristics as a colorless oil. The yield was 66% (based on the amount of 4-(4-fluorophenyl)-2-hydroxy-6-isopropyl-5-methoxycarbonylpyrimidine).

Provenance & Evidence