Process for the preparation of 2-chloroethanephosphonic dichloride

The invention relates to a process for the preparation of 2-chloroethanephosphonic dichloride through reaction of a 2-chloroethanephosphonate of the formula +TR or a mixture of the two esters, with thionyl chloride at a temperature of 60 DEG to 160 DEG C. In this reaction, tertiary phosphines, quate...

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Bibliographic Details
Main Authors BERGER; HARALD, SIEGEL; HERBERT, WEISS; ERWIN
Format Patent
LanguageEnglish
Published 07.06.1988
Edition4
Subjects
ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:The invention relates to a process for the preparation of 2-chloroethanephosphonic dichloride through reaction of a 2-chloroethanephosphonate of the formula +TR or a mixture of the two esters, with thionyl chloride at a temperature of 60 DEG to 160 DEG C. In this reaction, tertiary phosphines, quaternary ammonium or phosphonium salts or alkali metal or alkaline-earth metal halides are employed as catalysts. The thionyl chloride is introduced into the initially introduced ester.
Bibliography:Application Number: US19870089827