反应详情

A mixture of 60 g of 3-amino-1-(4-fluorophenyl)-2,3-dihydro-5-methoxy-1H-indol-2-one hydrochloride, 43 g of potassium carbonate, 20 ml of acrylonitrile and 200 ml of dimethyl sulfoxide was stirred at room temperature under argon atmosphere for 2 hours. 2 ml of acrylonitrile was added to the mixture, and stirring was continued overnight. The reaction mixture was poured into ice water and extracted with ethyl acetate. The extract was washed with a saturated sodium chloride solution, dried over anhydrous magnesium sulfate and filtered, the filtrate was concentrated under reduced pressure. Precipitated crystals were collected by filtration to afford 46.8 g of 3-[3-amino-1-(4-fluorophenyl)-2,3-dihydro-5-methoxy-2-oxo-1H-indol-3-yl]propanenitrile. Melting point 136° to 138° C. EI-MS (m/z): 325 (M+).

1. stirringstirring
2. waitwas continued overnight
3. extractionextracted with ethyl acetate
4. washThe extract was washed with a saturated sodium chloride solution
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationthe filtrate was concentrated under reduced pressure
8. customPrecipitated crystals
9. filtrationwere collected by filtration