Propargyl bromide → 1,5-bis(4-methoxyphenyl)-3-(2-propynyloxy)-1H-1,2,4-triazole

関与物質

反応手順

Potassium carbonate (279 mg, 2.02 mmol) was added to a solution of 1,5-bis(4-methoxyphenyl)-1H-1,2,4-triazol-3-ol (200 mg, 0.673 mmol) in dimethylformamide (2 mL). After 5 minute stirring, 3-bromo-1-propyne (0.18 mL, 2.02 mmol) was added to the mixture and the mixture was stirred for 4 hours. Ethyl acetate and water were poured into the mixture. The organic layer was separated, washed with water and brine, and dried over magnesium sulfate. The solvent was removed under reduced pressure. The residue was purified by silica gel column chromatography (toluene-ethyl acetate 4:1). The desired product was washed with isopropyl ether, isolated by filtration, and dried in vacuo to give 1,5-bis(4-methoxyphenyl)-3-(2-propynyloxy)-1H-1,2,4-triazole (99 mg, 43.9% yield).

情報源と証拠