Reaktion #63166

Reaktionsgleichung

phosgene

phosgene

hydrogen chloride

6-caprolactone

hydrogen chloride

N,N-dimethylpiperidinium chloride

→

6-chlorohexanoyl chloride

caprolactone

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeare passed in at 170°-175° C. in the course of 7 hours
2. 2
   workup.WAITThe reaction mixture is then kept at this temperature for a further hour
3. 3
   workup.DISTILLATIONthe reaction mixture is then worked up by distillation under reduced pressure

Vorschrift

456 parts of 6-caprolactone and 9 parts of N,N-dimethylpiperidinium chloride are initially taken in the stirred reactor described in Example 1. 380 parts of phosgene and 70 parts of hydrogen chloride are passed in at 170°-175° C. in the course of 7 hours. The reaction mixture is then kept at this temperature for a further hour. Any phosgene and hydrogen chloride still present are blown out with nitrogen, and the reaction mixture is then worked up by distillation under reduced pressure. 424 parts of 6-chlorohexanoyl chloride and 86 parts of caprolactone are obtained. The conversion is 81% and the yield is 77.3%, based on lactone used.

Quelle