PROCESS FOR PRODUCING 2,3,5-TRICHLOROPYRIDINE AND 2,4,4-TRICHLORO-4-FORMYLBUTYRONITRILE (MODIFICATIONS)

PROCESS FOR PRODUCING 2,3,5-TRICHLOROPYRIDINE AND 2,4,4-TRICHLORO-4-FORMYLBUTYRONITRILE (MODIFICATIONS)

A novel process for producing 2,3,5-trichloropyridine is described. The process comprises the addition reaction of trichloroacetaldehyde with acrylonitrile in the presence of a catalyst, and the subsequent cyclization of the intermediately formed 2,4,4-trichloro-4-formylbutyronitrile, with the split...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: PER MARTIN,CH, EGINKHARD SHTAJNER,CH, DANIEL BELLUS,CH
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A novel process for producing 2,3,5-trichloropyridine is described. The process comprises the addition reaction of trichloroacetaldehyde with acrylonitrile in the presence of a catalyst, and the subsequent cyclization of the intermediately formed 2,4,4-trichloro-4-formylbutyronitrile, with the splitting-off of water, to give 2,3,5-trichloropyridine. 2,4,4-Trichloro-4-formylbutyronitrile occurring as an intermediate product in the process according to the invention is a novel compound. It can be produced by the addition reaction of trichloroacetaldehyde with acrylonitrile in the presence of a catalyst. 2,3,5-Trichloropyridine can be used as intermediate for the production of herbicidal active substances.