Hydrochloric Acid → 2-Cyano-2-[4-(2,5-dichloro-phenoxy)-3-fluoro-phenylthiocarbamoyl]-acetamide

関与物質

反応条件

反応手順

To a solution of potassium tert-butoxide (0.6 g, 5.36 mmol) in 10 ml of anhydrous THF was added 2-cyanoacetamide (0.45 g, 5.36 mmol) under argon. The mixture was cooled to 5° C. and added dropwise to a solution of 4-(2,5-dichloro-phenoxy)-3-fluoro-phenylisothiocyanate (1.53 g, 4.87 mmol) in 5 ml of dry THF with stirring under argon. After 15 min of stirring at 5° C., this reaction mixture was warmed to room temperature and stirred for another 2 h. The reaction mixture was poured into 200 ml of ice water with stirring and acidified with 10% HCl. The solid was filtered and washed with water. After drying in vacuo, the crude product (1.6 g, 82.5%) was obtained in sufficient purity for the next step.

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