反应详情

A mixture of 1-(2-hydroxyethyl)benzimidazolone (J. Davoll, J. Chem. Soc., 1960, 308) (9 g), 4-fluoroiodobenzene (23 g), potassium carbonate (8.0 g), cupper(I) iodide (1 g), and zinc oxide (0.5 g) in N-methyl-2(3H)-pyrrolidinone (100 ml) was kept at 155° C. for 4.5 h. After cooling water (500 ml) was added followed by extraction with ethyl acetate (3×200 ml). The organic phase was washed with water and saturated calcium chloride solution and dried over magnesium sulfate. Removal of solvent in vacuo gave an oil which was purified by chromatography (silica gel, ethyl acetate) giving 1-(4-fluorophenyl)-3-(2-hydroxyethyl)-2(3H)-benzimidazolone (2 g) as a solid, mp: 124-26° C.

1. additionwas added
2. extractionfollowed by extraction with ethyl acetate (3×200 ml)
3. washThe organic phase was washed with water and saturated calcium chloride solution
4. dry with materialdried over magnesium sulfate
5. customRemoval of solvent in vacuo
6. customgave an oil which
7. customwas purified by chromatography (silica gel, ethyl acetate)