Réaction #55050

Équation de réaction

N-(4-chlorophenyl)-1-(1-methylethyl)-4-piperidinamine

[4-(2-chloro-2-oxoethyl)-phenyl] ethyl carbonate

→

{4-[2-{(4-chlorophenyl)-[1-(1-methylethyl)-4-piperidinyl]amino }-2-oxoethyl]phenyl} ethyl carbonate

Solvants

4-methyl-2-pentanone

Conditions de réaction

Traitement

1. 1
   TempératureUpon completion, the whole is heated
2. 2
   Températureto reflux
3. 3
   Températureat reflux temperature
4. 4
   TempératureAfter cooling
5. 5
   Filtrationthe precipitated product is filtered off
6. 6
   workup.STIRRINGstirred for 30 minutes in a mixture of alkaline water and trichloromethane
7. 7
   AutreThe layers are separated
8. 8
   AutreThe organic phase is dried
9. 9
   Filtrationfiltered
10. 10
    Autreevaporated
11. 11
    AutreThe oily residue is purified by column-chromatography over silica gel using
12. 12
    workup.ADDITIONa mixture of trichloromethane and methanol (90:10 by volume) as eluent
13. 13
    AutreThe pure fractions are collected
14. 14
    Autrethe eluent is evaporated

Mode opératoire

To a stirred mixture of 7.5 parts of N-(4-chlorophenyl)-1-(1-methylethyl)-4-piperidinamine and 80 parts of 4-methyl-2-pentanone are added dropwise 9 parts of [4-(2-chloro-2-oxoethyl)-phenyl] ethyl carbonate. Upon completion, the whole is heated to reflux and stirring is continued for one hour at reflux temperature. After cooling, the precipitated product is filtered off and stirred for 30 minutes in a mixture of alkaline water and trichloromethane. The layers are separated. The organic phase is dried, filtered and evaporated. The oily residue is purified by column-chromatography over silica gel using a mixture of trichloromethane and methanol (90:10 by volume) as eluent. The pure fractions are collected and the eluent is evaporated yielding 5.5 parts of {4-[2-{(4-chlorophenyl)-[1-(1-methylethyl)-4-piperidinyl]amino }-2-oxoethyl]phenyl} ethyl carbonate as an oily residue.

Source