反应详情

4-Amino-2,6-dichlorophenol (16 g.) was put into solution in N,N-dimethylaniline (15 ml.) and acetone (200 ml.), to which the acetone solution of 4-methyl-2-acetoxybenzoyl chloride was added dropwise. After reaction for several hours, by condensing and then acidifying the solution with 4 N hydrochloric acid a precipitate was obtained, which was redissolved in 2 N sodium hydroxide solution. The solution was made acidic with dilute hydrochloric acid, thereby precipitating the product which was recrystallized from aqueous acetone to give white crystals (20.3 g.) of 3',5'-dichloro-2,4'-dihydroxy-4-methylbenzanilide. Yield: 72.5%. The melting point was 246°-247° C.

1. customAfter reaction for several hours
2. customby condensing
3. customwas obtained
4. customprecipitating the product which
5. customwas recrystallized from aqueous acetone