反应详情

A solution of 1,5-dichloro-2,4-dinitrobenzene (5.0 g), glycolonitrile (1.81 g) and anhydrous potassium carbonate (2.19 g) in dimethylformamide (20 g) was stirred at 25° to 30° C. for 24 hours. After completion of the reaction, the reaction mixture was diluted with water (200 ml) and extracted with ethyl acetate (200 ml). The organic layer was washed with water, dried over magnesium sulfate and concentrated. The precipitated crystals were collected by filtration and washed with ether to give crude crystals (4.16 g), which were recrystallized from methanol to give 2,4-dinitro-5-chlorophenoxyacetonitrile (3.18 g; yield, 58.5%). M.P., 117°-118° C.

1. customAfter completion of the reaction
2. extractionextracted with ethyl acetate (200 ml)
3. washThe organic layer was washed with water
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated
6. filtrationThe precipitated crystals were collected by filtration
7. washwashed with ether
8. customto give crude crystals (4.16 g), which
9. customwere recrystallized from methanol