Reaktion #1253203

Reaktionsgleichung

chlorine

3,4-dimethyl-2-pyrazolin-5-one

→

3,4-dimethyl-4-chloro-2-pyrazolin-5-one

Lösungsmittel

1,2-dichloroethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeAfter the reaction
2. 2
   Temperaturthe reaction mixture was cooled
3. 3
   Filtrationfiltered
4. 4
   workup.DISTILLATIONThe solvent was then distilled off
5. 5
   SonstigeThe residue in the form of an oil was recrystallized from a 1:1 mixture of benzene and petroleum ether

Vorschrift

A chlorine gas was introduced into a solution of 3,4-dimethyl-2-pyrazolin-5-one in 1,2-dichloroethane, followed by gradual refluxing. After the reaction, the reaction mixture was cooled and filtered. The solvent was then distilled off. The residue in the form of an oil was recrystallized from a 1:1 mixture of benzene and petroleum ether, whereby 3,4-dimethyl-4-chloro-2-pyrazolin-5-one was obtained.

Quelle