Pyridine → HCID 67087558、化合物

関与物質

反応条件

反応手順

0.47 ml (5.81 mmol) of pyridine was added to 1.3 g (4.15 mmol) of 3-(2-ethoxypyridin-3-yl)-6-fluoro-3-hydroxy-2-oxo-2,3-dihydro-1H-indole-5-carbonitrile in 30 ml of dichloromethane. After the reaction mixture had been cooled to 0° C., 0.42 ml (5.81 mmol) of thionyl chloride was added dropwise. The mixture was stirred at room temperature for one hour and then poured into ice-water. After stirring for 15 minutes, the organic phase was separated off. The aqueous phase was extracted several times with dichloromethane. The combined organic phase was dried over magnesium sulfate and filtered, and the solvent was removed in vacuo. 1.13 g of 3-chloro-3-(2-ethoxypyridin-3-yl)-6-fluoro-2-oxo-2,3-dihydro-1H-indole-5-carbonitrile were obtained as a solid which was employed without further purification in the next stage.

情報源と証拠