Water → 2-(4-Cyanophenylamino)-2-[2-fluoro-3-(2-hydroxyethoxy)-5-methoxyphenyl]thioacetamide

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Reaction Steps

The crude product of 4-({cyano[2-fluoro-3-(2-hydroxyethoxy)-5-methoxyphenyl]methyl}amino)benzonitrile (2.77 g) obtained in Example 30 was dissolved in tetrahydrofuran (4.26 mL) and methanol (4.26 mL), and 20% aqueous ammonium sulfide solution (8.54 mL, 25 mmol) was added dropwise thereto at room temperature, and the resulting mixture was stirred at the same temperature. After completion of the reaction, water (4.26 mL) was added dropwise to the reaction mixture, and the resulting mixture was stirred at the same temperature for 0.5 hours. The precipitated solid was filtered. The filtrate obtained was sequentially washed with water and tert-butyl methyl ether, and dried to obtain the captioned compound (1.87 g) as a pale yellow solid.

Provenance & Evidence