反应详情

3-(2-chloroethoxy)-1-(3,4-dichlorophenyl)-5-methyl-1H-pyrazole (0.5 g, 1.64 mmol), N-(pyrrolidin-3-yl)acetamide (0.23 g, 1.8 mmol), K2CO3 (0.68 g, 4.9 mmol) and NaI (245 mg, 1.64 mmol) in dry dimethylformamide (10 ml) was warmed overnight at 85° C., and then an additionally 16 hrs at 95° C., in a dry nitrogen atmosphere. Solvents were evaporated in vacuo and the crude residue partitioned in water/ethyl acetate. The combined organic extracts were washed with water, dried on Na2SO4 and concentrated in vacuo to obtain a yellow crude oil, which was purified by column chromatography on silica gel (eluent: ethyl acetate 100% and ethyl acetate/MeOH 9/1) yielding 192 mg of N-(1-(2-(1-(3,4-dichlorophenyl)-5-methyl-1H-pyrazol-3-yloxy)ethyl)pyrrolidin-3-yl)acetamide as an oil.

1. customan additionally 16 hrs
2. customat 95° C.
3. customSolvents were evaporated in vacuo
4. customthe crude residue partitioned in water/ethyl acetate
5. washThe combined organic extracts were washed with water
6. customdried on Na2SO4
7. concentrationconcentrated in vacuo
8. customto obtain a yellow crude oil, which
9. customwas purified by column chromatography on silica gel (eluent: ethyl acetate 100% and ethyl acetate/MeOH 9/1)