反应详情

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.

1. stirringstirred for one hour
2. customthen partitioned between water and ethyl acetate
3. extractionThe aqueous phase was extracted with ethyl acetate
4. washthe combined organic extracts were washed with water, brine
5. customdried
6. customthen evaporated to a yellow solid
7. customThe crude material was purified by column chromatography on Merck 9385 silica eluting with dichloromethane:methanol (50:1)