37148-48-4 fast delivery Hot sale factory 4-Amino-3,5-dichloroacetophenone CAS NO.37148-48-4 CAS NO.37148-48-4

37148-48-4 fast delivery Hot sale factory 4-Amino-3,5-dichloroacetophenone

3,5-Dichloro-4-aminoacetophenone use and synthetic method use

3,5-Dichloro-4-aminoacetophenone is beige crystals and can be used as a pharmaceutical intermediate.

Chemical nature

Beige crystals. The melting point is 158-160°C. It is insoluble in cold water, slightly soluble in hot water, and easily soluble in organic solvents such as ethanol, ether and benzene. This product is an intermediate for the synthesis of a cough and asthmatic medicine, clenbuterol.

production method

P-aminoacetophenone is obtained by chlorination. Add p-aminoacetophenone and acetic acid (80%) into the reaction pot, stir to dissolve, quickly add the chlorine-containing glacial acetic acid solution, the feeding temperature is 5℃, after the addition, immediately put into the ice water to precipitate the precipitate, filter, wash, and obtain the crude product Recrystallize with ethanol to obtain the finished product.

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