Thionyl Chloride → 3-(2-chloroethyl)-2-phenylquinazolin-4(3H)-one

Participants

Reaction Steps

To a stirred mixture of 15 parts of 3-(2-hydroxyethyl)-2-phenyl-4(3H)-quinazolineone and 375 parts of trichloromethane are added dropwise 24 parts of thionyl chloride at room temperature. Upon completion, stirring is continued for 2 hours at reflux. The reaction mixture is evaporated. Water is added to the residue and the whole is neutralized with a sodium hydrogen carbonate solution. The product is extracted with trichloromethane. The extract is washed with water, dried, filtered and evaporated. The residue is crystallized from a mixture of 2,2'-oxybispropane and petroleumether. The product is filtered off and dried, yielding 11.6 parts of 3-(2-chloroethyl)-2-phenyl-4(3H)-quinazolinone.

Provenance & Evidence