Réaction #75122

Équation de réaction

1,3-dihydro-1-(3-hydroxypropyl)-5-(trifluoromethyl)-2H-benzimidazol-2-one

sulfinyl chloride

→

1-(3-chloropropyl)-1,3-dihydro-5-(trifluoromethyl)-2H-benzimidazol-2-one

Rendement 56.0%

Solvants

trichloromethane

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
   Autrethe reaction mixture is evaporated
6. 6
   Autrethe residue is crystallized from 2,2'-oxybispropane

Mode opératoire

To a stirred mixture of 23 parts of 1,3-dihydro-1-(3-hydroxypropyl)-5-(trifluoromethyl)-2H-benzimidazol-2-one in 150 parts of trichloromethane are added dropwise 32 parts of sulfinyl chloride. Upon completion, the whole is heated to reflux and stirring is continued for 1 hour at reflux temperature. After cooling, the reaction mixture is evaporated and the residue is crystallized from 2,2'-oxybispropane, yielding 14 parts (56%) of 1-(3-chloropropyl)-1,3-dihydro-5-(trifluoromethyl)-2H-benzimidazol-2-one.

Source