p-Fluoronitrobenzene → 5-[(4-nitrophenyl)-1,2,4-triazol-1-ylmethyl]-3,3-dimethyl-3H-isobenzofuran-1-one

関与物質

反応手順

3,3-Dimethyl-5-[1,2,4-triazol-1-ylmethyl]-3H-isobenzofuran-1-one (200 mg, Intermediate 1) was dissolved in N,N-dimethylformamide (8 ml) at 0° under nitrogen and potassium tert-butoxide was added (138 mg). After 30 minutes 4-fluoronitrobenzene (232 mg) in N,N-dimethylformamide (1 ml) was added and stirring continued for one hour. The mixture was warmed to room temperature, stirred for one hour then partitioned between water and ethyl acetate. The aqueous phase was extracted with ethyl acetate then the combined organic extracts were washed with water, brine, dried then evaporated to a yellow solid. The crude material was purified by column chromatography on Merck 9385 silica eluting with dichloromethane:methanol (50:1) to give a yellow oil, 5-[(4-nitrophenyl)-1,2,4-triazol-1-ylmethyl]-3,3-dimethyl-3H-isobenzofuran-1-one.

情報源と証拠