反应详情

温度

62 °C

A mixture of 10 parts of ethyl 4-[N-(4-chlorophenyl)-N-(phenylacetyl)amino]-1-piperidinecarboxylate and 125 parts of glacial acetic acid, previously saturated with gaseous hydrogen bromide, is heated for 9 h. 45 at 62° C., while stirring. The reaction mixture is cooled and glacial acetic acid is evaporated in vacuo. The semi-solid residue is taken up in 150 parts of water, alkalized with a concentrated sodium hydroxide solution and the product is extracted with trichloromethane. The extract is dried over sodium sulfate and evaporated. The oily residue is triturated in 56 parts of 1,1'-oxybisethane and the solid crude free base is filtered off. It is converted into the hydrochloride salt in the conventional manner in 1,1'-oxybisethane and 2-propanone, yielding 4 parts of N-(4-chlorophenyl)-N-(4-piperidinyl)benzeneacetamide hydrochloride; mp. 206.5° C.

1. temperatureThe reaction mixture is cooled
2. customglacial acetic acid is evaporated in vacuo
3. extractionthe product is extracted with trichloromethane
4. dry with materialThe extract is dried over sodium sulfate
5. customevaporated
6. customThe oily residue is triturated in 56 parts of 1,1'-oxybisethane
7. filtrationthe solid crude free base is filtered off