反应详情

5.0 g of alpha-(2-furyl)-alpha-aminoacetonitrile hydrochloride was dehydrochlorinated with sodium hydroxide in ethyl acetate by the same method as in the above Synthesis Example 6. Pyridine (2.5 g) was added, and furthermore, an ethyl acetate solution of 4.0 g of 3-methylisothiazole-5-carboxylic acid chloride was added dropwise After the addition, the mixture was stirred for 1 hour. The reaction mixture was washed with water, dilute hydrochloric acid and a dilute aqueous solution of sodium bicarbonate. Sodium sulfate, and active carbon were added to dehydrate and decolorize the reaction mixture. The solvent was removed under reduced pressure, and the residue was washed with ethyl ether to give 4.5 g (yield 74%) of the desired N-(alpha-cyanofurfuryl)-3-methylisothiazole-5-carboxylic acid amide

1. additionAfter the addition
2. washThe reaction mixture was washed with water, dilute hydrochloric acid
3. additionSodium sulfate, and active carbon were added
4. customThe solvent was removed under reduced pressure
5. washthe residue was washed with ethyl ether